Tag: screwdriver

How to Assemble a Makita Screwdriver Video

Innovative technologies in construction are developing every day, it is no longer a secret that a screwdriver is an indispensable assistant for both an experienced specialist and a novice master. Thanks to him, you can easily tighten all kinds of screws and self-tapping screws when assembling furniture designs, as well as when repairing equipment and residential premises.

How to Assemble a Makita Screwdriver Video

The fact that any equipment fails over time is no longer news to us, so it becomes possible to disassemble a screwdriver and try to repair it with your own hands. But only without fanaticism, be careful when disassembling, especially such models as: interskol yes 12er 01, interskol yes 18er.

How is a screwdriver arranged? (Video)

What problems can I fix in my home environment? How to recognize this or that breakdown? To give specific answers to the questions asked, let’s first look at the internal mechanism of the tool. The main protruding element is the power button. It is used to start the device and to change the speed, the direction of rotation of the working part. the cartridge.

Speed ​​adjustment is carried out thanks to an electronic device based on a transistor. The speed of revolutions is directly proportional to the force of pressing the button. The reverse is triggered by replacing the polarity of the electric current at the terminals. Traditionally, a screwdriver is equipped with single-phase collector type motors that operate on continuous current. The engine includes a housing, magnets, an anchor and brushes.

Rotation from the motor goes to the gearbox. Further, it converts high engine speeds into reduced cycles on the shaft, a cartridge with active bits is fixed in it. The gearbox can be used classic, as on a conventional drill, including a planetary one. Recently, the classic gearbox is almost not used, so we will not stop and go further. The planetary gear includes:

  1. Ring gear
  2. Sun gear mounted directly on the motor shaft
  3. Satellites
  4. two or three drove

Then follows a force stabilizer with sixteen positions. These positions give a specific tension on the self-tapping screw, so as not to spoil the material with which they are attached. The last component is the cartridge.

How to disassemble a screwdriver in general form (Video)

Let’s do a disassembly analysis, an example is a Makita screwdriver:

  • We remove the block housing where the battery is located.
  • We remove the screws that combine the two halves of the case with a Phillips screwdriver.
  • We take out everything that is contained inside the tool body.
  • Disconnect the reverse button.
  • Dismantle the speed switch.
  • We disconnect the engine and gearbox.

How the cartridge is disassembled (Video)

If the cartridge fixing is conical, then it is removed simply. by careful blows with a hammer on the block case. If the fasteners are threaded, you will need the following steps:

  • In the clockwise direction, unscrew the screw with the left thread.
  • We squeeze the hexagon in a vise, put a key on it and make blows with a hammer. Similarly, the cartridge should move from its original position. You can choose another option:
  • Put the screwdriver on a flat surface, on the table, for example.
  • Turn it on.
  • Observe if the cartridge has moved off the table. when striking a hexagon.

It also happens that all of the above methods do not work, and then one thing remains. to disassemble the screwdriver, after which:

  • Remove gearbox and spindle;
  • Position the assembly in the vise clamps;
  • Take the pipe wrench and then disconnect the chuck.

And if garbage is found in the gearbox, then you need to do so.

How to disassemble the battery (Video)

  1. Disconnect the screws at the bottom of the box.
  2. Open the box.
  3. Check and discard components.
  4. Replace and assemble again.

The mounting screws on the underside can vary in number, from four to six. Often unscrew with a Phillips screwdriver. Screws come in various lengths. This must be taken into account so as not to confuse them with each other during assembly. On some modifications, you can find a non-separable case. Then examine the entire surface and find a special strip along which the factory gluing passes. Next, you need to take a strong knife and insert it into the groove, slightly swaying to the sides. If the case breaks into the upper and lower parts, the autopsy was successful. Not a problem if this happens past the groove. All discrepancies can be glued with good superglue. The upper part of the housing contains several parts for the battery. At each of these components, a voltage is measured, which must certainly be in the range of the optimal level. If the difference is over 10%, such a battery needs to be replaced.

Each manufacturer seeks to create a tool that will be as convenient as possible in the work process, creating an extensive assortment of models. from basic level screwdrivers to professional samples.

Hitachi screwdrivers prioritize the excellent build quality as well as the practicality of their tools. Bosch’s model cordless screwdriver collection is practically no different from its counterparts, which have a cord for connecting to 220 V. Equipped with mode switches, as well as an off button and an accelerator option, Bosch screwdrivers are an excellent solution for home and professional use. In addition, such brands as Interskol, Makita, Cmi, Bison have proven themselves well.

Repair of the cartridge and other parts of the Makita screwdriver

Next, a screwdriver from the famous Makita brand will be considered, we will describe its technical properties and the general device, we will talk about the main dilemmas and defects that arise during the use of the tool, and of course, how to diagnose a breakdown at home and repair the one that is also called another element screwdriver.

Makita screwdriver

Description, general information

The Makita company makes various power tools among which screwdrivers are considered. The company began its history from the 20th century, and to this day, it continues to amuse consumers with its products of quality work. It is necessary to consider the general features and properties of the models of this office.

Makita screwdrivers are very powerful. The average indicator of the stroke frequency for different models is about 2300 rpm, which is a good indicator, compared with other brands. The weight of most models of instruments lies during 1.5 kg. Its small mass says that in fact, that such an inventory will work comfortably. The manufacturer also took care of the convenience of working in poorly lit rooms, making LED lighting on most models. Separately, it is worth highlighting the type of handle for holding these tools on weight. You, they become rubberized, so they are comfortable to hold in your hands, respectively, the process is much easier.

The disadvantage of these screwdrivers is the powerful vibration of the handle during operation, as well as their short-lived batteries. Today, the cost of the products of this office is quite high, which is important for the Russian consumer.

Scheme, device screwdriver "Makita"

Let’s look at the device of a screwdriver on a specific model 6271D. The scheme of this model is presented in the figure below.

Scheme 1

The diagram shows:

  1. Shift lever
  2. Body assembly
  3. Nameplate
  4. Screw
  5. Spring
  6. Lever arm reverse shift
  7. Start button
  8. Contact terminal
  9. Screw
  10. Keyless Chuck
  11. Gear assembly
  12. Electric motor
  13. Screw
  14. Body assembly
  15. Charging unit
  16. Battery

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A modern screwdriver is an ultra-technological device. Principal structural elements:

  • Removable battery
  • Rubberized handle grip
  • The most powerful electric motor
  • Iron planetary gear
  • Soft start button
  • Reverse button
  • Torque regulator

These are the main components of the construction of a screwdriver, which are included in the basic configuration of any model of a screwdriver.

Dismantling a screwdriver "Makita"

To disassemble a screwdriver, you will need a Phillips screwdriver and a little personal time. In order to completely disassemble a screwdriver, it is required:

  • unscrew fastening screws housing;
  • remove the composite mechanism of the start button;
  • remove the electric motor coupled with the gearbox;
  • disconnect the gearbox from the motor by unscrewing the bolts securing them.

To disassemble the battery of the screwdriver, you need to unscrew the bolts connecting the case, otherwise divide the case connections on the glue base with a soldering iron. Inside the battery there are several nickel-cadmium batteries that have a certain capacity and carry a charge. If the battery repair passage requires a change to new ones.

How to repair a reducer in 6271 Makita Restoring a reducer 6271

IN Makite 6271 gearbox failed in this matter video I will show how to return it. For this purpose, you will come in handy.

Change ”screwdriver gear. (Replacement gear screwdriver on Makita 8280d)

When replacing the gear unit, the cartridge was removed and the case cleaned from the inside. Hope it video It was fascinating for you.

The cartridge is changed with a screwdriver and an allen key. First, with a screwdriver, you unwind the fastening screw in the cartridge by rotating it clockwise. Then the hexagon is inserted, the reverse button is cut in, clamped, and later the cartridge simply lends itself.

Failures of the Makita screwdriver

frequent breakdowns of the Makita office screwdriver are as follows:

  • Do not cut the screwdriver. Here, well, what remains to make our client clear. First you need to look at the battery, in addition, the contacts and connections in the case, the wiring. A multimeter will help you to check.
  • The reverse button does not work. This means that you cannot either twist or unscrew the screws and bolts. Here you need to check the resistance of the button with a multimeter by placing the probes on the input and output wires of the button.
  • The speed controller does not work. In this case, the revolutions will be either constantly reduced or constantly overestimated. Here the regulating transistor or brushes will be to blame. Need a visual inspection of the details.

Repair of the Makita screwdriver

Repair of the Makita screwdriver button

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The on / off button of the instrument is a complex electrical mechanism. It consists of several constituent parts:

  • launch buttons
  • reverse buttons;
  • speed change buttons;
  • soft start buttons.

When repairing a button, you first need to disassemble it by loosening the screws body mounts and disconnecting the battery. As a result, it is necessary to check the connections and contacts for contamination, clean them. If the passage, if the stripping of the contacts did not help remove the problem, the button should be replaced as an assembly.

Repair of the charger of the Makita screwdriver

When repairing the charger, you need to unscrew the screws that fasten the housing covers. Inside is an integrated circuit with contacts. First you need to check the transformer with a tester. For this purpose, you need to measure the output voltage. Later, you should ring the cable to prevent it from breaking. Then the primary and secondary windings of the transformer and the fuse are checked. It must be assembled in the reverse order.

Repair of a battery of the Makita screwdriver

When performing battery repair with a Phillips screwdriver, unwind fastening screws corps. Inside the case there are several cans. With the help of visual inspection, you need to look at them and identify geometry violations, such as bloating, for example. We test banks with a multimeter for the presence of a residual charge. In its absence, the bank is replaced with the latest.

Repair of a reducer of the Makita screw gun (scheme)

To remove the gearbox, you need to disassemble the housing by unscrewing the screws with a Phillips screwdriver. We take out the start button, reverse switch button, disconnect the bolts of the motor to the gearbox. Then you need to pull out the contents of the gearbox (different gears), the speed switch washer. When examining an empty gearbox, special attention should be paid to the teeth placed around the circumference of the gear case. For which the design of their attrition is intended, the gearbox will not be able to do its function: the speed switch does not work correctly. To restore the teeth, you need to use small bolts, inserting them into the unique plastic area. Assemble the gearbox in reverse order. The gearbox diagram is shown in the figure below. He presented a general diagram of the gearbox.

Scheme 2

Brushes on screwdriver "Makita"

The brushes used for a screwdriver have a graphite base. Their price currently varies between 2-5 y. e. They are located in the motor housing and are two graphite cubes mounted on iron plates. With intense work, they wear out and wear out.

Carrying out repairs at home they have the option of turning rattles from brushes from another tool, for example, a car starter. After undercutting, they should be inserted into the brush holder and put into the area, collecting the engine.

Keyless chuck "Makita"

This cartridge is used to clamp bits with a cylindrical shank. This cartridge features ease of installation. It is installed with just one movement of the hand. It is used for drills with a diameter from 1 to 10 mm. This is a movable structural element in the tool, because it often breaks. To disassemble it, you need to read the tips, first described articles, on disassembling the cartridge using a hex wrench and a Phillips screwdriver. The cost of this product is about 20 y. e.

Video: How to Assemble a Makita Screwdriver Video


The material in this article came out great. Here we outlined to our client the probable tasks that arise during the operation of Makita office screwdrivers remain, told how to remove them with our own hands, separately talked about the various structural elements that make up the base of any screwdriver. The materials of the article show the scheme of the gearbox and the general device of the screwdriver. We hope that the information will be useful to you.

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The screwdriver can be repaired independently, having studied its structure and principles of operation of individual units.

Device and screwdriver malfunctions

All screwdrivers are arranged approximately the same. They consist of the following functional units:

  • start button;
  • pulse width regulator;
  • electric motor;
  • transistor;
  • planetary reductor.

All components of the device are in a strong and aesthetic case, which has a rubberized handle, control and adjustment buttons, as well as a slot for installing the battery (if the screwdriver is designed only for 220 V operation, it does not have a battery).

When you press the start button, the screwdriver may not be squeaking. This is a normal occurrence of DC motors at startup and at low speeds.

Why and how to adjust the ratchet

A ratchet screwdriver is a clutch designed to limit the force during rotation of the chuck. Its presence in the power tool can be determined by a rotating ring with numbers. Some users do not understand the meaning of the coupling and do not touch it. Using a ratchet, you can adjust the screwing depth of the screw. In too soft material, the fastener cap is easily recessed and can pass through. When using small fasteners, very high torque can destroy it. A ratchet prevents the cutting of a slot from self-tapping screws and the wear of a screwdriver bit. To determine the desired value on the control ring, make several passes, starting with the minimum.

If the screwdriver has a drilling mode, then the last icon on the coupling will be the icon with the image of the drill. In this position, maximum torque is used.

Frequent screwdriver malfunctions

Since all modern screwdrivers have a standard device layout, their malfunctions, as a rule, are also typical. The main defects of this tool include:

  • battery malfunction;
  • brush wear;
  • button breakage;
  • runout of a cartridge;
  • lack of response to attempts to turn on or off;
  • interruption work.

You can fix all these failures yourself if you have experience working with measuring and soldering devices. In some cases, you will have to change the components completely, since not all parts are sold separately. If repairing the gearbox or motor is too complicated for you, these elements can be completely replaced or taken to the workshop.

DIY screwdriver repair

To eliminate most of the malfunctions of a screwdriver, it needs to be disassembled, that is, removing the case and disconnecting the main components from each other.

How to disassemble a screwdriver

The screwdriver is disassembled in the following sequence:

  1. Remove the battery.
  2. Remove the screws connecting the two halves of the housing.

The case of the screwdriver consists of two parts connected by a fairly large number of screws. in order to disassemble it, you need to find all the attachment points

  • Remove its top.
  • Take out the contents.
  • Disconnect the button.

    • The screwdriver button is integral with the switching mechanism, which is connected to the engine, so when separating the button from the socket on the case, you must be careful not to break the wires

  • Remove the gear selector.
  • Disconnect motor, gearbox, adjuster, and chuck.

    • In order to disconnect the gear of the screwdriver from its engine, it is necessary to unscrew the four screws located at the contact point of the two plastic casings

    Video: how to disassemble a screwdriver

    Cartridge Repair

    The chucks in different models of screwdrivers may differ slightly from each other. They can be attached to the shaft in three ways:

    1. Morse cone.
    2. Threaded connection.
    3. Threaded connection with fixing screw.

    To determine the method of attaching the cartridge, you need to read the inscription on its sleeve:

    • the marking “1–6 B10” means a Morse cone. Used nozzles with a shank diameter of 1 to 6 millimeters. The coding "B10" indicates the size of the cone. Take a hammer and knock out a cartridge by striking the body;
    • inscriptions like “1,0–11 M12x1,2” or “2–13 mm ½-20 UNF” mean metric and inch threads.

    If the cartridge is threaded, you must perform the following steps:

    1. Release the cams of the cartridge.
    2. If there is a screw inside, unscrew it clockwise (the screw has a left-hand thread).
    3. Take a 10mm hexagon wrench.
    4. Insert the short edge into the cartridge and tightly clamp in the fists.
    5. At low speeds, start and immediately turn off the screwdriver so that the long edge of the hexagon hits the table. Instead of turning on the device, you can simply hit the key with a hammer. The thread moves and the cartridge is unscrewed.

    In order to remove the cartridge, you need to hold the hex key in it and start the engine at low speeds until the key hits the table

    Video: how to remove a threaded chuck using a hex wrench

    If these methods do not help, disassemble the screwdriver and remove the gearbox assembly. Take the L-shaped tubular wrench (most often 19 ”) and unscrew the chuck, holding the gearbox securing bolts on the back with the cap wrench. She will give the necessary emphasis, with which you can unscrew the cartridge by hand.

    Video: how to remove a cartridge with a pipe wrench

    To disassemble the cartridge, you need to remove the cap at its base. The plastic plug is gently poked with a knife. Metal. knocked out by hammer blows on the base of the cartridge:

    1. Take a large bolt, insert it into the cartridge and slightly tighten for alignment. The bolt head should protrude above the cartridge for two to three centimeters.
    2. Hammer the bolt head. The cartridge will pop out of the case.

    Video: removing a plastic plug from a screwdriver chuck

    Common cartridge malfunctions:

    • crookedly pinches bits;
    • play between bits and cams;
    • cams jerk out.

    To find out the reasons and eliminate them, follow these steps:

    1. Disassemble the cartridge.
    2. Remove the flare nut, which consists of two parts.
    3. Unscrew the clamping jaws.
    4. Check the condition of the threads on the nut and on the cams, replace the defective parts.

    In the process of working on cams or a flare nut that controls their work, a thread may develop or crumble, then these parts must be replaced

    Assemble the cartridge in the reverse order of disassembly.

    Video: analysis and repair of a cartridge with a metal plug

    Battery Repair

    Three types of batteries are used in screwdrivers:

    1. Nickel Cadmium (Ni-Cd). They can be charged many times, but they have a memory effect. If you do not wait for the full discharge and begin to charge the battery, then its capacity will gradually decrease. Swing the battery before first use. Discharge and recharge it three times to maximize capacity.
    2. Nickel Metal Hydride (Ni-MH). A feature of such batteries is a less pronounced memory effect, but a high self-discharge current. If you intend to store a screwdriver without use for more than a month, be sure to fully charge its battery.
    3. Lithium-ion (Li-Ion). These batteries charge quickly, but do not tolerate frost. They can be charged when convenient.

    Store all types of batteries separately from the screwdriver and charger. For long periods of non-use, they need to be recharged once a month.

    If the battery does not hold a charge, disassemble it. It consists of several batteries. Check the voltage tester in each. The value of the operating voltage is indicated on the housing (it is the same for all elements). Replace broken batteries.

    The battery of a screwdriver consists of several elements, which you can call and find and replace those that have failed

    Video: eliminating fast battery drain

    If the battery cannot be removed, the locking button is most likely stuck. It is necessary to remove the upper part of the case, disconnect the battery, disassemble it and adjust the button.

    Charger Repair

    Frequent damage to the charger:

    • the fuse is on;
    • network cable breaks;
    • the primary winding of the transformer breaks;
    • diodes break through.

    If we disassemble the charger of the screwdriver, then we will see a step-down transformer and a board. Through the mains voltage is supplied to the primary winding of the transformer. The thermal fuse is connected in series with the network winding, so it overheats first and prevents the winding from breaking. From the secondary winding, the voltage passes to the diode bridge. If charging transmits current, yellow is formed around the diodes. Transformer windings overheat, diodes break through.

    The charger of the screwdriver consists of a step-down transformer and a board with electronics

    1. Measure the resistance on the primary winding with a multimeter. If it is not there, it means that the circuit is disconnected and the voltage does not reach the primary coil. The fuse is located beneath the transformer insulation next to the wires connecting to the network. Check it with a tester.
    2. If the fuse is intact, check the power cord; it may be broken.
    3. If the wire is OK, check the windings. In case of breakdown, replace the transformer.

    Video: diagnostics and repair of the charger

    Button Issues

    A malfunction of the start button can lead to the following malfunctions of the screwdriver:

    • self-propelled guns appear;
    • the device does not turn on;
    • the device is unstable.

    From the button, two wires go to the battery terminals and two to the engine. If there is a transistor, then it is connected by three wires. Make sure the problem is in the button:

    1. Connect the battery. Press the button and tester measure the voltage at its output, it should be absent.
    2. Remove the battery and remove the upper motor wire from the button housing.
    3. Connect the motor directly to the battery. To do this, take two wires of the required length and connect them to the battery terminals. Connect the other ends of the wires to the motor housing and to the wire that was inserted into the button. If the engine is running, then the button is faulty.

    Video: diagnostics and replacing a screwdriver button

    Button repair sequence:

    1. The wires coming from the button do not need to be soldered. Carefully, so as not to damage the base, remove the push part of the button that does not fall into the interior of the case. This should not be done in a jerk, but slowly rotated and pulled towards yourself.
    2. Remove the protective cover. Take a knife and a flat screwdriver. Pry and release all latches. Pull out element number 1 and remove the cover of the inclusion compartment under number 2. If the contacts are slightly burnt, they must be cleaned. But if they burn out completely, then the button is best replaced. It is sold complete with wires. If the contacts are intact, then move on.
    3. Holding the spring, carefully remove the trigger mechanism. Look inside. Perhaps, due to the poor quality of the metal, the contact pads wiped off and dust formed, which settled inside the plastic box. Accordingly, dielectric surfaces began to conduct electric current. This is one of the reasons for spontaneous operation of the device. The second reason is a failed transistor. Remove metal dust with a cotton moistened with alcohol. Contacts can be scraped off with a knife, but not with sandpaper, so as not to spoil their surface. Now reassemble everything in reverse order. Replace the burnt transistor. Turn on the tool.

    The cause of the malfunction of the button may be burnt contacts, metal dust or a burnt transistor

    Inspection and repair of the force regulator

    Behind the cartridge is an adjusting ring with a spring that controls the force and snaps the cartridge away from the gearbox. This spring presses on the balls, which abut against the protrusions of the ring gear of the gearbox. Disassemble the ratchet, check the integrity of all its elements. Remove dirt with a rag dampened with alcohol, grease balls.

    Video: ratchet repair

    Gearbox disassembly and repair

    The main elements of the gearbox:

    They are made of metal and plastic. An annular gear is a cylinder with internal teeth along the entire circumference. Satellites move along the teeth.

    The first carrier has two gears at both ends. The first solar is the engine drive gear. She enters between the satellites of the first carrier. The second solar on the opposite side sets between the satellites of the second carrier. In a two-stage gearbox, the second carrier is connected to the shaft on which the cartridge is worn. The three-stage gearbox has another mechanism. All these parts are located inside the ring gear.

    The engine transmits the rotation to the first stage satellites through the sun gear. The first carrier rotates the second stage of the satellites. If there is a third step, then the second carrier will rotate it. Satellites of all stages rotate inside the ring gear. The last carrier rotates the cartridge shaft. With each transmission of torque, the speed drops.

    Gearbox disassembly sequence:

    1. Cartridge removal.
    2. The unwinding of the body.
    3. Disconnecting the gearbox from the motor.
    4. Plate removal.
    5. Removing all parts from the chassis.

    When disassembling the gearbox, all parts are removed sequentially: first satellites of the first stage, and then the second

  • Unscrew all bolts that connect both halves of the gearbox.
  • Correction of spring diameter using pliers to improve gear engagement.
  • Disassembly of the coupling by removing the retaining ring, washers, bulk bearing.
  • Shaft removal

    • Arrange all the parts of the disassembled gear in order, so that later it is easier to assemble.

    1. If a rattle is heard during the operation of the screwdriver or it twitches, then the gearbox has defects. During operation, you have to make lateral pressing and heavily load the tool. Because of this, the gearbox shaft bends and a noticeable runout occurs. In this case, the assembly changes assembly.
    2. If the support sleeve and shaft bearing are worn, they can be replaced with similar ones.
    3. Breakage of the pin of the satellite is accompanied by the start and instant stop of the engine. Replace the carrier or gearbox.
    4. Wearing gear teeth also requires replacing the gearbox.

    Often, gearbox repair is reduced only to cleaning and lubrication. Do not overdo it with grease, otherwise the device will work poorly.

    Video: disassembling, assembling, cleaning and lubricating the gearbox

    Brush replacement

    Graphite brushes are located at the end of the engine on the connection side with the button. They can be located inside the engine housing under the rear cover or outside. If at least one of the brushes is worn by 40%, change both. Check your contacts. The following signs indicate wear on the brushes:

    • the engine runs jerkily;
    • sounds unusual for normal operation are heard;
    • sparking;
    • the smell of burning.

    When removing and installing the brushes, you need to hold the holders, otherwise, under the action of the spring, they can scatter quite far

    Video: replacing engine brushes

    Engine repair

    The screwdriver uses a DC motor in a cylindrical case with magnets. Inside is an anchor with windings and brushes. To check the motor, disconnect the gearbox and the wires leading to the button, and measure the resistance of the armature winding with a multimeter. Lack of readings indicates a break, and a very low value indicates a short circuit. The collector resistance is measured on the shaft and each plate. It must be zero. Faults in the anchor lead to shutdown during operation, loss of power, sparking and smoke.

    Video: testing the winding of the armature and collector plates with a multimeter

    Often when the engine fails, the gear remains intact. Since in most engines it is pressed onto the shaft, its removal takes place with some difficulties. Buy a special puller or use the tools at hand. Do not try to do this with pliers or a nail puller. you will bend the shaft and spoil the gear teeth.

    1. Take a piece of profile or channel. Make a longitudinal groove angle grinder.
    2. Insert the shaft into the groove perpendicular to the profile and pry off the gear.
    3. Lay the profile on two hard surfaces so that the engine hangs between them.
    4. Take a nail and gently tap the edge of the shaft with a hammer. The gear will slip easily.
    5. Put the gear onto the new engine with a hammer and a hard surface.

    Video: remove the gear from the engine shaft

    The screwdriver is cracking but not twisting

    If there is a crack in the screwdriver, first try changing the position of the speed controller. Perhaps he was not involved. If this procedure does not help, disassemble the tool.

    1. If the engine is spinning, disconnect the chuck. Check the rotation of the gearbox shaft and the condition of the motor gear.
    2. If the shaft does not rotate and the gear is intact, disassemble the gearbox. Check the condition of the teeth of the satellites and gears.
    3. If the engine does not work, check the brushes, windings and anchor.

    Now you know how to disassemble, assemble and repair a do-it-yourself screwdriver.

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    Disassembling a Bosch Gsr 10 8 screwdriver

    Disassembling a Bosch Gsr 10 8 screwdriver

    • Compatibility: Bosch
    • Type: Battery
    • Bosch Power Tool Model: GSR 10.8 V-Li
    • Battery marking: Bosch 2607336013, Bosch 2607336014, Bosch 2607336333, Bosch BAT411, Bosch BAT411A, Bosch BAT412A, Bosch BAT413A

    Cash, Visa / MasterCard, Privat24, Cashless

    from the manufacturer: 12 months

    Description Battery for screwdriver GSR 10.8 V-Li 10.8V 2Ah Li-ion / DV00PT0001 PowerPlant

    In every home, sooner or later there is a need for power tools. It makes no difference, carrying out repair work is, the layout and disassembly of accessories or other needs. But a similar need arises in any apartment. Power tools can be divided into two main groups:

    • With a feed from a network;
    • Battery powered.

    Video: Disassembling a Bosch Gsr 10 8 screwdriver


    Benefits of Bosch PowerPlant BAT412A Battery Powered Tools:

    There are many opinions about which type of power tool is more convenient. Previously, there was a judgment that power tools with power from the mains are better, although this is not at all true. Much depends on the type of power tool, if its use requires significant electrical power, then this statement is true, in any other cases, cordless tools and their network alternatives can work with the same quality and productivity. In cordless power tools there are a number of advantages:

    • Maneuverability. lack of need for a network;
    • Ease of use. no cords, and unlimited length of use;
    • Pretty low price;
    • A fairly wide range of working conditions.

    How to choose the right battery for your Bosch GSR 10.8 V-Li power tool?

    The first thing you need to focus on when choosing a battery for a power tool is its class:

    • Li-ion;
    • Ni-cd;
    • Ni-Mx.

    The second point is the capacity of the drive, the larger the capacity, the longer the tool will function:

    • Less than 1.5 ampere / h;
    • 5-2.0 A / hour;
    • 1-3.0 ampere / h;
    • One A / h and more.

    It is necessary to look at other immediate properties from the focus of the consistency of batteries with chargers. In other words, these characteristics of the charger and battery must be compatible.

    Another, at first glance, not important, although in fact a fairly relevant factor is the mass of the battery. If it is smaller, all the more wonderful, although batteries that have a large capacity, respectively, will weigh more.

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    How to Insert a Bit into a Makita Screwdriver

    Screwdriver: how to use it correctly?

    • Date: 03/26/2015
    • Views: 567
    • Rating: 14

    A screwdriver does the same as a screwdriver, but hundreds of times faster. Therefore, if you need to tighten one or two screws, use a screwdriver. But if you need to assemble a wardrobe or, for example, insulate with BAL-KON drywall, then you can not do without an electric screwdriver. It looks like an electric drill, but it does not drill with drill bits, but with bits. The bat is a special nozzle for a screw, screw or self-tapping screw. Each screw (screw, screw) has its own bit. It can be of different sizes.

    How to Insert a Bit into a Makita Screwdriver

    A screwdriver is like an electric drill, but instead of a drill, it has a bit.

    How to use a screwdriver?

    The screwdriver is designed specifically for screwdriving, self-tapping screws, screws. Its great advantage is autonomy, that is, there is no need for an outlet and the cords will not interfere underfoot. It runs on a battery that charges from the AC mains through the adapter (the process of charging the battery resembles the process of charging a mobile phone). After charging, the battery, gently pressing, insert into the tool handle.

    Batteries are nickel-cadmium, nickel-metal hydride and lithium-ion. Which one to choose? Nickel-cadmium. the cheapest, but toxic. Lithium-ion is environmentally friendly but expensive. Nickel-metal hydride is intended for professionals who, on duty, have to repair for a long time.

    Replaceable tips, bits, are fixed in a three-jaw chuck manually no deeper than the upper edge. To make it more convenient to hold the cartridge in hand when attaching the nozzles, the cartridge is covered with ribbed rubber on top.

    How to use a screwdriver.? After the necessary nozzle is installed, we put a self-tapping screw on the bit, put it in the right place, press the screwdriver button. the self-tapping screw is twisted.

    The screwdriver can be used as a standalone electric drill. They cannot be drilled for a long time, as the battery runs out quickly. But a few holes in the profile or drywall can be done.

    Nevertheless, the main purpose of the screwdriver is to tighten the screws without drilling the profile. With a certain effort, a self-tapping screw will drill both an aluminum and even a steel profile.

    On the instrument, if necessary, there is a button for smoothly changing the speed and a reverse button, if you need to unscrew the self-tapping screw.

    The instruction prescribes to use a screwdriver after all the settings are made.

    When the tool is on, you cannot adjust the frequency and direction of rotation of the handpiece (bits). The tool must be protected from water. The room in which repairs will be carried out should be well lit.

    Video: How to Insert a Bit into a Makita Screwdriver


    If the screwdriver is operating from the mains, the power supply must be stable, and the socket must be in good working order, in order to avoid electric shock or fire.

    Do not touch grounded objects with a working tool in order to avoid electric shock.

    It is only necessary to work with a working tool in work clothes and gloves. Do not use the device continuously to prevent it from burning out.

    How to work with a cordless screwdriver

    Naturally, the main feature of the cordless screwdriver is its mobility in operation. You can use it in places where there is no electricity or access to it is limited. When performing various kinds of installation, furniture assembly and other works, a screwdriver will become an indispensable assistant. The presence of a second battery in the configuration allows you to continuously work with a screwdriver, using one and charging the second. When operating any tool, it is necessary to remember the observance of safety precautions, as well as its proper use, which will be discussed later.

    To start working with a screwdriver, you need to fully charge the battery, it doesn’t matter if it is Makita or an inexpensive Chinese tool. Well, if the screwdriver has an indication of the battery level, which will make it convenient to use the battery. To start charging, you must connect the charger to the network. the green indicator light will turn on. The battery has a special groove, due to which it can be inserted into the charger only in the correct way, which will protect the battery from reverse polarity. The battery must be installed tightly so that the contacts of the charger and the battery fit snugly together.

    After installing the battery in the adapter, the red indicator lights up, which signals the charging process. When charging is complete, the indicator changes color to green. After fully charging, install the battery in a screwdriver. So. you can get to work. It is worth noting that the color of the indicators may vary from different manufacturers, however, the process itself is always just that.

    A distinctive feature of the screwdriver is the presence of an adjusting ring, which is responsible for the torque. This feature allows you to avoid excessive screwing or disruption of the screw slot. Thanks to a special mechanism, the cartridge stops when the screw is tightened, and the engine continues to work. The adjustment ring can set the drilling mode. In the remaining positions of the regulator, the clutch will begin to slip at a certain force. The engine speed switch (if any) allows you to use two speed modes with a lower or higher speed.

    An absolutely necessary thing in a screwdriver. This switch is used to change the direction of rotation of the cartridge. In the central position, the switch blocks the pressing of the start key. In the remaining two positions, the cartridge will rotate clockwise and against it, which allows you to screw and unscrew the screws. This key is always located above the start button so that you can change the direction of rotation of the cartridge with your thumb and forefinger without using your second hand.

    Installing bits in a cartridge

    Screwdrivers can have a plastic or metal keyless chuck, which greatly simplifies the process of installing the bit and removing it, but many models have hexagonal chucks, i.e. allow you to directly insert a bit or snap without twisting. To fix the drill or bit in the keyless chuck, insert it into the screwdriver until it stops and tighten the chuck by hand. You can also, holding the front of the cartridge, pull the trigger and the cartridge will unwind.

    Storage, maintenance and cleaning The drill and charger do not require any special maintenance. It must be stored in a dry place that is not exposed to low temperatures and direct sunlight. You must regularly check the integrity of the device, and make sure that the mounting bolts are tightened. Use a damp cloth for cleaning. Do not use active solvents or aggressive chemicals, which can damage the screwdriver. Keep the device in good condition, which will extend its service life, keep the batteries in a warm place, cooling in the winter can negatively affect the quality and service life of the batteries.

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    Alteration of the Makita Screwdriver Battery For Lithium

    I will not say anything new in this article, but I just want to share the experience of upgrading the batteries of my old Makita screwdriver. Initially, this tool was designed for nickel-cadmium batteries (which had already died long ago, as they had died, and those bought in replacement were the same). The disadvantages of Ni-Cd are known: low capacity, short life, high price. Therefore, manufacturers of cordless tools have long switched to lithium-ion batteries.

    Well, what about those who have an old instrument? Yes, everything is very simple: throw out Ni-Cd cans and replace them with Li-Ion in the popular 18650 format (marking indicates a diameter of 18 mm and a length of 65 mm).

    What kind of board do you need and what elements are needed to convert a lithium-ion screwdriver

    So, here is my 9.6 V battery with a capacity of 1.3 Ah. At maximum charge, it has a voltage of 10.8 volts. Lithium-ion cells have a nominal voltage of 3.6 volts, maximum. 4.2. Therefore, to replace the old nickel-cadmium cells with lithium-ion cells, I need 3 cells, their operating voltage will be 10.8 volts, the maximum. 12.6 volts. Exceeding the rated voltage will not harm the motor in any way, it will not burn out and with a larger difference, there is no need to worry.

    Alteration of the Makita Screwdriver Battery For Lithium

    Lithium-ion cells, as everyone has long known, strongly dislike recharging (voltage above 4.2 V) and excessive discharge (below 2.5 V). With such excesses of the operating range, the element degrades very quickly. Therefore, lithium-ion cells always work in tandem with the electronic board (BMS. Battery Management System), which controls the cell and controls both the upper and lower voltage limits. This is a protection board that simply disconnects the jar from the electrical circuit when the voltage goes beyond the operating range. Therefore, in addition to the elements themselves, such a BMS board will be required.

    Now there are two important points with which I experimented several times unsuccessfully, until I came to the right choice. This is the maximum allowable working current of the Li-Ion elements themselves and the maximum working current of the BMS board.

    In a screwdriver, operating currents at high load reach 10-20 A. Therefore, you need to buy elements that are capable of delivering high currents. Personally, I successfully use 30-ampere 18650 cells manufactured by Sony VTC4 (with a capacity of 2100 mAh) and 20-ampere Sanyo UR18650NSX (with a capacity of 2600 mAh). They work fine in my screwdrivers. But, for example, Chinese TrustFire 2500 mAh and Japanese light green Panasonic NCR18650B at 3400 mAh are not suitable, they are not designed for such currents. Therefore, do not chase the capacity of the elements. even 2100 mAh is more than enough; the main thing when choosing is not to miscalculate with the maximum permissible discharge current.

    And in exactly the same way, the BMS board must be rated for high operating currents. I saw on Youtube how people collect batteries on 5 or 10-amp boards. I don’t know, personally, when I turned on the screwdriver, such boards immediately went to defense. In my opinion, this is a waste of money. I will say that Makita itself puts 30-ampere boards in its batteries. Therefore, I use 25-amp BMS purchased on Aliexpress. They cost about 6-7 dollars and are searched for by request "BMS 25A". Since you need a board for an assembly of 3 elements, you need to look for a board in the name of which will be "3S".

    Another important point: some boards may have different contacts for charging (designation “C”) and load (designation “P”). For example, a board can have three pins: “P-”, “P”, and “C-”, as on a native Makita lithium-ion board. Such a board will not suit us. Charging and discharging (charge / discharge) must be done through one contact! That is, the board should have 2 working contacts: just “plus” and just “minus”. Because our old charger also has only two pins.

    In general, as you might have guessed, with my experiments I threw a ton of money both on the wrong elements and on the wrong boards, having made all the mistakes that could have been made. But got invaluable experience.

    How to disassemble a screwdriver battery

    How to disassemble an old battery? There are batteries where the halves of the case are screwed, but there is also glue. My batteries are just the last, and I generally thought for a long time that they could not be taken apart. It turned out that it’s possible if you have a hammer.

    In general, with the help of intensive blows to the perimeter of the edge of the lower part of the body (a hammer with a nylon head, the battery must be kept in hand in weight), the gluing place is successfully disconnected. The case is not damaged in any way, I have already disassembled 4 pieces.

    Part of interest to us.

    Video: Alteration of the Makita Screwdriver Battery For Lithium


    From the old circuit, only contact plates are needed. They are firmly welded to the upper two elements by spot welding. You can pick out the welding with a screwdriver or pliers, but you need to pick it as carefully as possible so as not to break the plastic.

    Everything is almost ready for further work. By the way, I left the standard temperature sensor and circuit breaker, although they are no longer particularly relevant.

    But it is very likely that the presence of these elements is necessary for the normal operation of a standard charger. Therefore, I strongly recommend that you save them.

    Putting a lithium-ion battery

    Here are the new elements of the Sanyo UR18650NSX (you can find them on this article on Aliexpress) with a capacity of 2600 mAh. For comparison, the old battery had a capacity of only 1300 mAh, half as much.

    It is necessary to solder the wires to the elements. Wires must be taken with a cross-section of at least 0.75 sq. Mm, because the currents we have will be considerable. A wire with such a cross section normally works with currents of more than 20 A at a voltage of 12 V. It is possible to solder lithium-ion banks, short-term overheating will not harm them in any way, this has been checked. But you need a good high-speed flux. I use TAGS glycerin flux. Half a second. and you’re done.

    Solder the other ends of the wires to the board according to the diagram.

    On the battery connectors, I always run even thicker wires of 1.5 sq. Mm. because the place allows. Before soldering them to the mating contacts, I put on a piece of heat-shrink tubing on the board. It is necessary for additional isolation of the board from the battery cells. Otherwise, the sharp edges of the solder can easily rub or pierce a thin film of the lithium-ion cell and cause a short circuit. You can not apply heat shrinkage, but at least something insulating to lay between the board and the elements is absolutely necessary.

    Now everything is insulated as it should.

    The contact part can be fixed in the battery case with a couple of droplets of super-glue.

    The battery is ready for assembly.

    It’s good when the case is screwed, but this is not my case, so I just glue the halves together with the “Moment” again.

    The battery is charged with a standard charger. True, the algorithm of work is changing.

    I have two chargers: DC9710 and DC1414 T. And they now work differently, so I’ll tell you exactly how.

    Makita DC9710 Battery Charger and Li-ion Battery

    Previously, the battery charge was controlled by the device itself. Upon reaching the full level, it stopped the process and signaled the completion of charging with a green indicator. But now level control and power off are handled by the BMS circuit we have installed. Therefore, when charging is complete, the red LED on the charger will simply turn off.

    If you have just such an old device. you’re in luck. Because everything is simple with him. The diode is on. charging. Off. charging is complete, the battery is fully charged.

    Makita DC1414 T Battery Charger and Li-ion Battery

    There is a small nuance that you need to know. This memory is newer and it is designed to charge a wider range of batteries from 7.2 to 14.4 V. The charging process on it goes as usual, the red LED is on:

    But when the battery (which is supposed to have a maximum voltage of 10.8 V in the case of NiMH cells) reaches 12 volts (we have Li-Ion cells with a maximum total voltage of 12.6 V), the roof will be blown down by the charger. Because he will not understand what kind of battery he is charging: either 9.6-volt, or 14.4-volt. And at that moment, the Makita DC1414 will enter error mode, alternately blinking red and green LEDs.

    This is normal! Your new battery will still charge. though not completely. The voltage will be approximately 12 volts.

    That is, you miss some part of the capacity with this charger, but it seems to me that you can survive it.

    Total modernization of the Bosch battery cost about 1,000 rubles. The new Makita Makita PA09 costs twice as much. over, in the end, we got twice the capacity, and further repairs (in the event of a failure several times) will consist only in the replacement of lithium-ion cells.

    Attention: this article and images in it are subject to copyright. Partial or full reproduction on other resources without approval is prohibited.

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    Which Screwdriver Is Better Devolt Or Makita

    A screwdriver is a more modern analogue of a screwdriver, with which less effort is spent, and work is performed faster and more efficiently. When choosing a tool, it is important to consider that the cordless screwdriver is mobile, but may be discharged at the wrong time. And the electric one should always work close to the outlet or, in extreme cases, to an extension cord. Also important are the power of the torque, the presence of backlight, reverse and nozzles.

    Our top 10 best screwdrivers will help you make your choice. According to buyers, it is these screwdrivers who top the rating of the best in terms of price and quality. So, the equipment in 2018. 2019 was pleased with the following models.

    10 Interskol DSh-10 / 320E2

    Which Screwdriver Is Better Devolt Or Makita

    The product of the Russian manufacturer definitely deserves attention, at least due to the fact that it opens our rating of the best screwdrivers in 2018. 2019. This 320 kW drill / driver has a stylish design and sleek design. The only model in our rating that works from the network, which means that it will not fail at the most difficult moment (cable length. 2 m). Another advantage of a screwdriver is that the maximum torque is 35 Nm.

    Pros:

    • Keyless type chuck.
    • It has a reverse.
    • Comfortably lies in a hand.
    • Affordable price.

    Minuses:

    • Experience is needed to carefully twist long self-tapping screws (the tool is really powerful).
    • There is no case for storage. you need to buy separately a case or box.

    9 Interskol DA-10 / 12M3

    Keyless drill / driver with Ni-Cd battery. The Interskol DA-10 / 12M3 tool is sold together with a special case, which immediately solves the problem of storing both a screwdriver and a charger for it. A compact and concise screwdriver with good lighting is also convenient to use in poorly lit conditions, for example, under a table or when assembling a cabinet.

    Pros:

    • Batteries charge quickly.
    • Improved, compared with previous models, the cartridge of the product.
    • High-quality lighting.
    • Nice value.

    Minuses:

    • There is no rattle.
    • The performance of the case is not always perfect.

    8 Hitachi DS14DVF3

    Another member of our top with ergonomic design, battery life and stable power. The battery is a Ni-Cd type, which means that it needs to be fully discharged. But the Hitachi DS14DVF3 comes with a second, spare battery, so you won’t have to stop working.

    Pros:

    • Equipped with a flashlight.
    • Sold with bits and holders for them.
    • Charging fast.

    Minuses:

    • The model does not always cope with active work on metal, but for wood it is quite worthy.
    • After a couple of years of operation, the batteries fail.

    7 Makita 6280DWPLE

    Good mid-range drill / driver. The balanced design and quick-clamping type of a cartridge do it by the worthy choice for household works. It does not have too high power, but it fully complies with the declared parameters. Makita 6280DWPLE. this is the case when expectations are met.

    Pros:

    • A very durable model. a literal acquisition for years.
    • There is a ratchet mode.
    • Convenient bit changer system.

    Video: Which Screwdriver Is Better Devolt Or Makita


    Minuses:

    • This tool is not easy. it weighs 1.4 kg.
    • With active use, the batteries will have to be changed after two years, but only the batteries.

    6 Makita DF331DWYE

    Another Japanese unit that deserves our attention. This model is a drill / driver that also works on battery power, which charges fully in 30 minutes. A compact tool at a reasonable price perfectly complements the home "arsenal" for furniture assembly and minor repairs.

    Pros:

    • Extra battery included.
    • Has a power button lock function.
    • It is equipped with spot lighting of the drilling site, which is turned on as desired.
    • Equipped with a holster.

    Minuses:

    • This is a household model, therefore, with frequent and active use, the engine may burn out.
    • The backlight sight may be biased.
    • It is loose in the case. it makes noise during transportation.

    5 Makita DF330DWLE

    A screwdriver for those who prefer quality, time-tested. The best option for both domestic needs and for more active use. In the kit everything you need. from a case to a spare battery, works great both as a screwdriver and as a hammerless drill. With a Makita DF330DWLE drill, not only quality but also comfort will work.

    Pros:

    • The presence of a removable battery (while one is working. the second is charging).
    • Equipped with a flashlight.
    • Power button lock function.
    • Rubberized handle does not slip in the hand.

    Minuses:

    • The gears in the gearbox are plastic, making the screwdriver lighter, but inaccurate operation may require replacement.
    • The cartridge shades slightly at the drilling site.

    4 Bosch GSR 1440-LI 1.5Ah x2 Case

    Good equipment from a reliable manufacturer. The screwdriver runs on battery power, copes with both wood and metal. Strong attachment of attachments, quick response to commands, engine brake function. this is why this model is among the top ten.

    Pros:

    • A system is used to protect the battery from overheating, overload, and full discharge.
    • Compact charger.
    • All gearbox elements are metal.
    • Carefully thought-out design. the product is more likely to get bored than fail.
    • Holds a charge up to 8 hours.

    Minuses:

    • It is more convenient to change the nozzles using the button, rather than manually (and for this you need to free both hands).
    • There is sparking in the area of ​​the gearbox brushes (does not affect operation).

    3 Hitachi DS14DCL

    This screwdriver was included in the first three of our TOP-10 rating of screwdrivers in 2018. 2019 and has proven itself both as a drill and as a screwdriver. It has a reverse and electronic speed control, thoughtful ergonomics and a storage case. Smooth adjustment of the power moment, fast charging of batteries and long charge holding. all this makes Hitachi DS14DCL one of the best in its niche.

    Pros:

    • Has an engine brake.
    • Step power adjustment.
    • Quality bits included.

    Minuses:

    • Often there is a Chinese, not a Japanese assembly.
    • The lack of a charge indicator (to the end it turns stably powerfully, without slowing down, so the discharge comes unexpectedly).

    2 DeWALT DCD771C2

    High power drill / driver for the fast execution of a solid amount of work. Sophisticated design ensures durability and consistent quality. The diameter of the chuck is up to 13 mm, the maximum diameter of the drill on wood is up to 30 mm.

    Pros:

    • High maximum torque. 42 Nm.
    • Lock the power button.
    • Convenient mode switches.
    • The charger measures the temperature of the battery before charging and does not charge a battery that is too cold or too warm.

    Minuses:

    • The tool is massive (all parts are metal).
    • Possible slight backlash of the cartridge.
    • There is no battery discharge indicator.

    1 Makita DDF343SHE

    Quite expensive, but a standing screwdriver headed our TOP-10 2018. 2019. The Makita brand has long established itself as a manufacturer of quality tools, and the DDF343SHE model is proof of this. This is a cordless two-speed screwdriver with two rechargeable blocks in the kit. you don’t have to worry that the tool “sat down” at the wrong time. It works with large drills: when working on wood, it is compatible with drills up to 25 mm in diameter, for metal. up to 10 mm.

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    How to Recover a Bosch 12v Screwdriver Battery

    A practical owner, like no one else, understands how convenient and efficient a stand-alone manual power tool is. A professional builder, who is mainly engaged in finishing work, can’t do without a screwdriver at all. Nevertheless, a battery, of any type, after a certain time begins to lose its energy potential. Purchasing a new battery is not cheap. But who said that screwdriver battery recovery is not possible in principle? What prevents the owner of the brand modification to save on expensive batteries? You probably will not be surprised at the universality of the answer. Ignorance. Developing the topic, we note: it is possible! The material in this article will help you solve the problem of “global aging” of the battery. One has only to read about how and what needs to be done.

    How to Recover a Bosch 12v Screwdriver Battery

    "Banks" in which money is not stored

    Speaking about the restoration of the screwdriver’s battery, one cannot fail to mention that the batteries with which the specified construction tool is equipped can have different technical characteristics. Often this kind of "energy personality" of the power source plays an important role at the time of operation. For example, under low-temperature operating conditions, preference should be given to nickel-cadmium batteries. While the nickel-metal hydride type batteries are more durable in use and can have a relatively large capacity. Meanwhile, lithium-ion batteries are widely used. A power source of this type does not need any maintenance at all, is devoid of a “memory effect", and most importantly. with a high capacity, the "energy banks" of the battery are more compact than those of "competitors.

    Screwdriver battery recovery through freezing

    Most likely, your power tool is equipped with a nickel-cadmium battery. Because this type of battery (in the context of this article) is the most common. Exclusively therefore, our material is devoted specifically to this type of battery. However, the recommendations below are also valid for the use of metal hydride energy sources. So, the procedure:

    • Place the battery packaged in a plastic bag (fully discharged!) In the freezer.
    • After 10-12 hours, remove the battery from the refrigerator.
    • For a few hours, charge the battery.
    • After which it is necessary to “land” the battery. Let it work until the energy runs out in the containers.
    • Repeat the described procedure 2-3 times.

    But what if the restoration of the screwdriver’s battery did not succeed in full? In this case, you should resort to a comprehensive solution to the problem, which you will learn about from the sections below.

    Dismantling the hull of an autonomous power supply

    After you have been convinced that the several deep charge / discharge cycles carried out did not give a positive result, and your battery is still quickly discharged during operation, follow the step-by-step scenario. As an example, take a battery for a Makita screwdriver.

    • Before starting the direct disassembly process, charge the device.
    • To gain access to the battery capacitive elements, it is necessary to unscrew a few fixing screws.
    • In some cases, it is necessary to gently crack the case at the junction of structural parts.

    Attention: when implementing the last dismantling option, do not use excessive physical force, since it is possible to deform the battery housing plastic. Remember: after the "restoration" work, the container should sit securely in place.

    Search for the "weak link": the definition of a failed "banks"

    So, the battery for a Makita screwdriver is several batteries connected in series. However, the standard circuit (when the positive contact of one of the containers is connected to the minus of the next “bank”) is used in almost all such devices. Of course, this refers to a stand-alone power tool. So, the algorithm of actions:

    Video: How to Recover a Bosch 12v Screwdriver Battery


    • Using a multimeter, make a methodical measurement of all elements of the "energy strapping".
    • In order not to get confused. do not grin, because nickel-cadmium batteries for screwdrivers (18 volts) usually consist of 15 capacitors connected in series. on each "bank" make notes of the "current" voltage with a regular pencil.

    Attention: when measuring, you should use a simple device, which consists of two wires and a load resistance of 0.5 ohms. As a result, you will receive the most plausible data on the status of the batteries involved.

    • Having connected the “load” to the measuring device, check the values ​​issued by the containers.
    • The element with the lowest rate needs to be replaced with a known-working component of the power supply system.
    • It should be noted that a deviation of 0.5-0.7 V from the norm is considered to be critical.

    Forced Retreat: Battery Power Features

    As you already understood, the device of the screwdriver’s battery is no different. Nevertheless, the serial circuit of the connected batteries can have an additional component in the form of an installed thermistor (heat sensor), the principle of which is to open the charging circuit at a time when the temperature reaches a critical level. overheating. However, when repairing a battery, the output rating of the battery used in the power tool should be taken into account, as well as the identity of the typical layout.

    In other words, sufficiently powerful batteries for screwdrivers (18 volts. a very common standard) are usually assembled from fifteen nickel-cadmium cells. Each individual capacity has an energy potential of 1.2 V. In the case when the device is equipped with a lithium-ion type battery, the 18-volt battery consists of five cells with a nominal value of 3.6 V. As a result, Li-ion batteries are more compact and lighter than the battery of previous technologies.

    Inoperative Battery Replacement Process

    • Using a sharp knife (the ideal option is a scalpel), "cut off" the contact plates "" and "-" from a malfunctioning container.
    • Using a household soldering iron and fusible solder, add a new capacitive element to the overall “energy harness” of the battery.
    • Observe polarity when installing a new container.

    Important: do not overheat the case when soldering. Use special acid and catalytic fluxes.

    Assembly and initial charging of the screwdriver battery

    • After you have replaced defective items, carefully check the solder points.
    • When installing the battery “bundle” in a protective container, do not forget about the insulating substrates that protect the elements from the moment of closure.
    • Gently glue or twist the connection points of the housing with fixing screws.

    It doesn’t matter which battery for the screwdriver (Interskol, Makita or Bosh) you restored. The main thing is how well you assembled the energy device. Since any minor error during installation, whether it is a body gap, a “jammed” wire or improper positioning of the contact plates, can nullify all your efforts. Only after you have visually made sure that everything is correctly assembled, you need to completely discharge the "new" battery. The battery for a screwdriver (12V) will sit down very quickly if you “load” it in full. The next thing you have to do is to produce 2-3 cycles of deep charge / discharge. It is worth noting that this kind of prevention should be performed at least once every three months.

    Useful Tips

    • Do not bother if your battery is a lithium-ion type. It is unlikely that you will be able to restore it.
    • A traditional nickel-cadmium battery can always be pushed with a short-time supply of a higher voltage. However, before resorting to such drastic measures, it is necessary to study this electrical question of “reincarnation” in more detail.
    • You may not know, but the traditional type of battery, which is a nickel-cadmium battery, cannot be connected to charging if its capacities have sufficient energy potential. Otherwise, the destructive consequences of the “memory effect” of the battery simply cannot be avoided.

    Instead of an afterword

    The Russian battery for the Interskol screwdriver is not inferior in quality to brand analogues. However, the cost of the domestic battery, without exaggeration, is sparing. For those who are not confident in their abilities, who are “easier” to purchase a new battery than restore the old one, this is an option. Nevertheless, in the case when the structural part of the energy container has exclusive forms (grooves, retainers and specific bends), you still have to devote several minutes of your precious time to technical creativity. Since it may be necessary to repack the battery in the "native" case. Well, you already know how to charge the screwdriver’s battery and what you need to do when the battery does not charge due to long downtime in the discharged state. Effective recovery methods for you and do not forget about security. yours and those around you!

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    Alteration Makita Screwdriver On Lithium

    Industry has been producing screwdrivers for a long time, and many people have old models with nickel-cadmium and nickel-metal hydride batteries. Converting a screwdriver to lithium will improve the performance of the device without buying a new tool. Now many companies offer screwdriver battery remodeling services, but you can do it yourself.

    Converting a screwdriver to lithium batteries

    Benefits of Li-ion batteries

    Nickel-cadmium batteries have a low price, withstand many charging cycles, are not afraid of low temperatures. But the battery capacity will decrease if you put it on charge without waiting for a full discharge (memory effect).

    Lithium-ion batteries have the following advantages:

    • high capacity, which will provide a longer working time for the screwdriver;
    • smaller sizes and weight;
    • well keeps a charge in an idle state.

    But the lithium battery for a screwdriver does not withstand full discharge, so the factory tools on such batteries are equipped with additional boards that protect the battery from overheating, short circuit, overcharge in order to avoid explosion, complete discharge. When the microcircuit is installed directly in the battery, the circuit is opened if the unused battery is located separately from the instrument.

    Alteration Difficulties

    There are objective flaws in Li-Ion batteries, such as poor performance at low temperatures. In addition, when converting a screwdriver to lithium 18650 batteries, a number of difficulties can occur:

    1. Standard 18650 means that the diameter of one battery cell is 18 mm with a length of 65 mm. These dimensions do not match the sizes of nickel-cadmium or nickel-metal hydride elements previously installed in a screwdriver. Replacing the batteries will require placing them in the standard battery case, plus the installation of a protective microcircuit and connecting wires;
    2. The voltage at the output of lithium cells is 3.6 V, and that of the nickel-cadmium cells is 1.2 V. Suppose that the rated voltage of an old battery is 12 V. Such voltage cannot be provided with a series connection of Li-Ion cells. The scope of voltage fluctuations during charge-discharge cycles of an ion accumulator also changes. Accordingly, reworked batteries may not be compatible with a screwdriver;
    3. Ion batteries differ in the specifics of work. They poorly withstand a recharge voltage of more than 4.2 V and a discharge of less than 2.7 V until failure. Therefore, when the battery is redone, a protective board must be installed in the screwdriver;
    4. An existing charger can not be used for a screwdriver with a Li-Ion battery. You will also need to remake it or purchase another.

    Important! If a drill or screwdriver is cheap and not very high quality, then it is better not to rework. This may be more expensive than the cost of the tool itself.

    Battery Choice

    Often, 12 V batteries are used for screwdrivers Factors to consider when choosing a Li-Ion battery for a screwdriver:

    1. In such tools, elements with high discharge currents are used;
    2. In many cases, the capacitance of an element is inversely related to the discharge current, so you cannot select it only by capacity. The main indicator is the current. The value of the operating current of the screwdriver can be found in the instrument passport. Usually it is from 15 to 30-40 A;
    3. It is not recommended to use cells with different capacities when replacing the battery of a screwdriver with a Li-Ion 18650;
    4. Sometimes there are tips to use a lithium battery from an old laptop. This is absolutely unacceptable. They are designed for a much lower discharge current and have unsuitable technical characteristics;
    5. The number of elements is considered based on an approximate ratio of 1 Li-Ion per 3 Ni-Cd. For a 12-volt battery, you will need to put 3 new ones to replace 10 old cans. The voltage level will be slightly reduced, but if you install 4 elements, then increased voltage will shorten the life of the electric motor.

    Important! Before assembly, it is necessary to produce a full charge of all elements for equalization.

    Disassembling the battery case

    The case is often assembled on self-tapping screws, other options. using latches or glue. The glued block is the most difficult to disassemble, you have to use a special hammer with a plastic head so as not to damage parts of the case. Everything is deleted from the inside. Only contact plates or the entire terminal assembly can be reapplied for connection to a tool, a charger.

    Video: Alteration Makita Screwdriver On Lithium


    Alteration Makita Screwdriver On Lithium

    Battery Connection

    Compound Li–Ion batteries for screwdriver performed in several ways:

    1. The use of special cassettes. The method is fast, but the contacts have a large transition resistance, can quickly collapse from relatively high currents;
    2. Soldering. A method suitable for those who know how to solder, since you need to have certain skills. Soldering should be done faster, because the solder cools quickly, and prolonged heating can damage the battery;
    3. Spot welding. It is the preferred method. Not everyone has a welding machine, such services can be provided by specialists.

    Soldering elements

    Important! The elements must be connected in series, then the battery voltage is added, and the capacity does not change.

    At the second stage, wires are soldered to the contacts of the assembled battery and to the protective board according to the connection diagram. Wires with a cross-sectional area of ​​1.5 mm² are soldered to the contacts of the battery itself for power circuits. For other circuits, you can take thinner wires. 0.75 mm²;

    Then a piece of shrink tubing is put on the battery, but this is not necessary. You can also use heat shrink on the protective microcircuit to isolate it from contact with the batteries, otherwise the sharp protrusions of the solder can damage the shell of the element and provoke a short circuit.

    Battery assembly

    Further battery replacement consists of the following steps:

    1. Disassembled parts of the case are well cleaned;
    2. Since the dimensions of the new battery cells will be smaller, they must be securely fixed: stick to the inner wall of the housing with Moment glue or sealant;
    3. The plus and minus wires are soldered to the old terminal block, it is placed in its original place in the case and fixed. The protective board is laid, the parts of the battery pack are connected. If they were previously glued, then “Moment” is used again.

    Tips for choosing a security chip

    A lithium-ion screwdriver battery cannot function properly without a BMS protection board. Selling items have different parameters. Marking BMS 3S assumes, for example, that the board is designed for 3 elements.

    What you need to pay attention to choose the right chip:

    1. The presence of balancing to ensure uniform charge of the elements. If it is present, the value of the balancing current should be in the description of the technical data;
    2. The maximum value of the operating current maintained for a long time. On average, you need to focus on 20-30 A. But it depends on the power of the screwdriver. Low-power enough 20 A, powerful. from 30 A;
    3. The voltage upon reaching which the batteries are switched off during recharging (about 4.3 V);
    4. The voltage at which the screwdriver is turned off. It is necessary to select this value based on the technical parameters of the battery cell (minimum voltage. about 2.6 V);
    5. Overcurrent trip current;
    6. Resistance of transistor elements (minimum value is selected).

    Important! The value of the tripping current during overload does not matter much. This value is tuned to the current of the workload. For short-term overloads, even if the tool is turned off, you need to release the start button, and then you can continue to work.

    Connection diagram of elements with a protective board

    Whether the controller has an autostart function, it is possible to set by the presence of the entry “Automatic recovery” in the technical data. If there is no such function, then to restart the screwdriver after the protection has been activated, it will be necessary to remove the battery and connect it to the charger.

    Charger

    The lithium-ion screwdriver battery cannot be charged by connecting to a conventional power supply. A charger is used for this. The power supply simply provides a stable charge voltage within the specified limits. And in the charger, the determining parameter is the charge current, which affects the voltage level. Its meaning is limited. In the memory circuit there are nodes responsible for terminating the charge process and other protective functions, for example, shutdown with incorrect polarity.

    The simplest memory is a power supply with resistance included in the circuit to reduce the charging current. Sometimes they also connect a timer that works after a specified time period has elapsed. All of these options do not contribute to long battery life.

    Charging Methods Li Ion batteries for a screwdriver:

    1. Use of factory charger. Often it is also suitable for charging a new battery;
    2. Alteration of the charger circuit, with the installation of additional circuit elements;
    3. Purchase of ready-made memory. A good option is IMax.

    Suppose there is an old Makita DC9710 charger for charging a 12 V Ni-Cd battery, which has an indication in the form of a green LED that signals the end of the process. The presence of the BMS board will allow you to stop the charge after reaching the specified voltage limits for the element. The green LED will not light up, but the red will simply turn off. The charge is over.

    Charger Makita DC9710

    The Makita DC1414 T charger is designed to charge a wide range of rechargeable batteries 7.2-14.4 V. In it, when the protective shutdown is triggered, at the end of the charge, the indication will not work correctly. There is a blinking of red and green light, which also signals the end of the charge.

    The cost of replacing the screwdriver’s batteries with lithium-ion batteries depends on the power of the tool, the need to buy a charger, etc. But if the drill screwdriver is in good functional condition, the charger does not require a thorough alteration or replacement, then for a couple of thousand rubles you can get an improved power tool with increased battery life.

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    Alteration of the Battery of the Hitachi 12 Screwdriver

    Energy Storage Information Site

    Each master is faced with the problem of reducing the operability of the tool, or a complete failure due to the battery. Manufacturers use nickel-cadmium batteries in 12, 14, 18 volt screwdrivers. The sequential assembly of several elements creates the desired voltage. Replacing lithium nickel-cadmium batteries increases the battery life, making the design easier. Mandatory installation of the BMS board adds reliability. Therefore, the alteration of the screwdriver on lithium batteries, mainly on the form factor 18650, is justified.

    Alteration of the Battery of the Hitachi 12 Screwdriver

    The meaning and procedure for converting screwdrivers to lithium batteries

    Why do nickel-cadmium batteries fail quickly? In a garland of cans connected in series, each is distinctive. The chemical process is individual, the charge in closed systems is different. If there is a malfunction in one bank, the design does not provide the desired voltage. The control system and charge balancing in individual components is not provided.

    1. Each Ni-Cd bank gives 1.2 V, and li-ion 18650 gives 3.6 V.
    2. The capacity of a lithium battery is 2 times more than a nickel-cadmium, close size.
    3. An overheated li-ion battery threatens to explode and catch fire, so setting charge uniformity control in banks is mandatory. BMS is not installed in nickel-cadmium batteries. the manufacturer is not interested.
    4. Lithium cells do not have a memory effect, unlike Ni-Cd, you can charge them at any time and for an hour.
    5. The screwdriver becomes much easier after the alteration of the battery on li-ion, using 18650 cans.

    There are only two obstacles to remaking a screwdriver for lithium batteries. it is impossible to work with it in the negative. The capacity of the cans drops, starting from a decrease already from 10 0 C. Lithium batteries are expensive.

    Knowing what input voltage is required for the screwdriver, the charger is reworked, taking into account the placement of lithium battery cans and control elements in the factory container. You can also do with a flashlight by upgrading the socket for a block of 18650 elements.

    Suppose you need to remodel a 12 V screwdriver using Ni-Cd cans on li-ion. If you use 3 cans, the output voltage is not enough: 3.6 x 3 = 10, 8 V. With 4 components, the power of the device will be higher: 3.6 x 4 = 14.4 V. In this case, the tool will become lighter by 182 g , its power will slightly increase, capacity is a solid plus. But when dismantling, it is necessary to leave the terminals and the native temperature sensor.

    Converting a screwdriver to lithium batteries 18650 14 V

    When remodeling screwdrivers of different capacities and flashlights from Ni-Cd to Li-ion, they often use 18650 form factor batteries. They easily fit into a container or socket, since instead of two or three relatives they install one lithium one. Alteration of the screwdriver battery should be carried out taking into account the characteristics of lithium batteries at 18650.

    This type of energy source does not tolerate deep discharge and excessive charge. Therefore, it is necessary to use voltage control boards. Since each battery has its own character, their charge is adjusted by the balancer. The meaning of the alteration of a screwdriver with a voltage of 14.4 V is to create a device using lithium batteries to facilitate a hand tool and increase its performance. Most suitable for these purposes are lithium batteries 18650.

    When selecting components, it should be noted that the starting current of the screwdriver is high, you must select the appropriate BMS for the desired number of cans and at least 30 A. To remake the screwdriver with a lithium battery, you need to stock up with a good soldering iron, non-acid flux and thick wires to make jumpers.

    • 4 lithium-ion cans
    • 4-bank li-ion battery controller, CF-4S30A-A is well suited. It has a built-in balancer that controls the charge of each element.
    • Hot melt adhesive, TAGS solder flux, solder.
    • Heat-resistant adhesive tape;
    • Connection jumpers or thick wire in insulation with a cross section of at least 0.75 square, cut for bridges.

    Video: Alteration of the Battery of the Hitachi 12 Screwdriver


    The procedure for remaking a screwdriver for 18650:

    • Disassemble the housing and remove from the container a bundle of 12 Ni-Cd elements.
    • Remove the garland, leaving the connector with the conclusions "" and "-". Instead of a temperature sensor, a thermocouple from the controller is installed.
    • Solder the assembly, given that acid cannot be used, only neutral flux and pure solder. During the connection period, do not heat the lids. Work pointwise.
    • Connect the balancing points to the controller according to the diagram. Connectors are provided on the board.
    • Connect the assembly to the plus and minus terminals.
    • Check the operation of the circuit. If everything works, the assembled battery, place the controller in the socket, fasten with sealant.

    If the memory is not universal, additional alteration is required. 12 V screwdrivers with a universal charger are assembled in the same way, but a protective connection scheme of 3×18650 3.7 V for lithium batteries is used. In the same way, a screwdriver is reworked using a battery kit of 18650 in the amount of 2 elements.

    Converting a Makita screwdriver to a lithium battery

    There is a Makita screwdriver with a 1.3 A / h battery and a voltage of 9.6 V. To change the power source to a lithium-ion one, you will need 3 components 18650. Alteration will provide the old tool with new features: increase the duration of work on a single charge , will add power, since the operating voltage rises to 10.8 V.

    For the design, you will need to use BMS, a control controller that supports the mode of operation of lithium cells within the operating limits. With this breaker, the charging of each can will be uniform without exceeding 4.2 V, the lower voltage is 2.7 V. The built-in balancer is used here.

    The parameters of the controller should accompany the operation of the tool when the operating current is increased to 10-20 A. A 30 V Sony VTC4 board with a capacity of 2100 A / h can ensure operation without shutting down. From 20 amperes, Sanyo UR18650NSX is suitable for receiving energy of 2600A / h. The board is needed for 3 elements, which is marked in the 3S classification. In this case, the board should have 2 contacts, plus and minus. If the findings are marked with the letters "P-", "P", "C-", they are intended for later models of screwdrivers.

    A step-by-step instruction for converting a Makita screwdriver to lithium batteries looks like this.

    1. It is possible to disassemble the battery on glue, if on weight tap the place of connection with a hammer with a soft head. Direction of impact down to the joint along the lower part of the body.
    2. Take only contact plates from the old assembly, carefully disconnecting them from the battery. Sensor and disconnect must be left.
    3. Solder 3 elements in series using TAGS flux and insulation jumpers. The wire cross section must be greater than 0.75 mm2.
    4. Assemble the circuit with the controller, and connect the power supply to the connectors with 1.5 square wires.
    5. Check the operation of the circuit and assemble the housing, again putting it on the glue.

    In a screwdriver with an old DC9710 charger, after the 18650 lithium battery is charged, the red LED on the panel will turn off. The charge level is monitored by the built-in controller.

    The Makita DC1414 T charger is used to charge power supplies of 7.2-14.4 V. While charging, the red light is on. But when charging a lithium battery, its voltage does not fit into the standards of salt products, and after 12 V the charger will flash red and green. But the necessary charge is already there. The screwdriver is ready to work.

    Converting a 12 V Hitachi screwdriver to 18640 lithium batteries

    Features of the conversion of a 12 V Hitachi screwdriver to lithium batteries. A very compact socket for battery cells designed for finger cells. Therefore, you should prepare a place for 18650 elements. It is necessary to cut one side of the partition to fit 1 element tightly.

    You need to get a flux, a flat metal connecting tape, hot melt adhesive. Install lithium batteries in a screwdriver during alteration must be through a protective controller. It should serve 3 cells 18650, voltage of 3.7 V and is designed for 20-30 amperes.

    Remove the old battery from the socket, carefully disconnect the contacts in the assembly with the temperature sensor and power indicator. Strip and sign contacts. They should be brought out in one direction, connected by solder to the leads from thick wires and fill the assembly with hot glue.

    Assemble an energy source with one of the controllers, designed for 3 elements. Assemble a serial circuit of 3 Li-ion elements. Connect the controller. Alteration of the lithium 12-volt battery is completed when the design is installed in the unit, is fixed, and the charge indicator lights up. After fully charged, the measurements show 12.17 volts in the external network. But this is enough for trouble-free long-term operation of the device.

    Alteration of the Interskol screwdriver to 18650 lithium batteries

    Sooner or later, the nickel-cadmium assembly of 15 cans fails. One or two elements are lazy, and it is already impossible to obtain the voltage at the output. Modern DS “Interskol” on lithium batteries serve much better. Alteration of a screwdriver on lithium batteries 18 volt masters mastered.

    It is necessary to purchase a protection board for 5S, 3.7 V and 40-50 A. You will need a balancing board and the energy sources themselves. 5 lithium 18650 batteries, you can leave them with factory thermistors, extending the wires. During installation, create a contact pad, insert the assembly, check operation, fix it. Assembly features wizard tips are given in detail in the video. Here is full details of the rework of the 18-volt lithium screwdriver

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    Convert Bosch Screwdriver Battery To Lithium

    Increasingly, users give preference to cordless power tools, which are compact in size and allow you to work where it is problematic to stretch the power cable. The battery for a screwdriver should be selected based on the loads to which the device is planned to be subjected, as well as depending on the conditions of use. Some batteries cannot be fully discharged, and some are not suitable for use in the cold.

    Convert Bosch Screwdriver Battery To Lithium

    The battery can be removed and put back without much effort.

    What is the design of the battery for a screwdriver

    The rechargeable battery is a plastic case in which several small batteries connected by a contact tape are located. The ends of the tape go out and look like oblong plates. The main task of the battery is to generate direct current using the electrolysis process.

    Batteries for screwdrivers differ in various technical characteristics

    Each battery consists of the following elements:

    • electrodes represented by anodes and cathodes;
    • electrolyte;
    • corps.

    Directly in the power tool itself there is a special hole where the battery case is placed. A reliable fastening is provided by two terminals located on the sides of the battery. For many screwdriver manufacturers, a rechargeable battery may have a detachable case, although professionals have learned to carefully disassemble integral battery packs for screwdrivers without harming them. In order to open the case, it is enough to use a screwdriver with which fasteners are unscrewed.

    Mini batteries located inside the case are cylindrical. The number of batteries depends on what voltage is needed for the device. It can be 8, 10 or even 15 elements, which, as a rule, are placed in several rows.

    It is interesting! The batteries for a screwdriver are connected to each other using a tape, the basis of which is nickel. Internal elements are connected in a sequential order, standardly. from minus to plus. Spot welding is used to secure the tape to the batteries.

    Some screwdrivers are sold with two batteries.

    The current in the battery is generated due to the potential difference at the cathode and anode. All batteries have different properties. The main characteristics that are of interest to users include:

    • material used for the manufacture of the pole and electrolyte;
    • voltage affecting the performance of the device;
    • a capacity that determines how much time you can work with the device without recharging.

    Battery voltage is determined by the number of batteries built in. One cell typically has a charge of 1.2 to 3.9 volts. Due to the serial connection, the required number of volts is gained. For the operation of a household tool, an indicator of 10.8-14.4 V is enough, but a professional device for normal operation needs 18-36 V.

    The battery capacity of the screwdriver determines the maximum operating time. This indicator is primarily affected by the current consumed by the device, as well as the voltage when completely discharged.

    Battery capacity affects battery size

    Batteries: which are better, the main types, advantages and disadvantages of each

    The question of which batteries are available can be answered in different ways. Some products are rarely used for power tools. In general, four types of batteries for screwdrivers should be distinguished. These include:

    • nickel-cadmium. Ni-cd;
    • lithium-ion. Li-ion;
    • nickel metal hydride. Ni-mh;
    • lithium polymer. Li-Pol.

    Most often, nickel-cadmium and lithium-ion batteries are used for screwdrivers. Nickel-metal hydride nutrients have been used almost universally before, but have recently lost relevance. The main reasons for this were the quick heating of the device when using charging for a screwdriver and in the process of working with fasteners.

    Nickel-cadmium and nickel-metal hydride batteries

    Nickel-cadmium and nickel-metal hydride batteries were the first alkaline batteries to provide battery technology. They were developed at the end of the century before last. Nickel-cadmium devices are considered to be in demand, as they, due to certain reactions inside the battery, heat up less and guarantee longer operation. Metal hydride devices are less hazardous than cadmium batteries.

    Some manufacturers make screwdrivers with different types of batteries

    Among the main advantages of nickel-cadmium batteries for a screwdriver can be identified:

    • low probability of overheating during operation, which saves internal elements from melting;
      strong metal case;
    • resistance to chemical reactions occurring inside, which excludes strong heating of the device;
    • tightness of the outer coating, which prevents the wetting of the internal elements;
    • the ability to function normally in frost conditions from 15 to 25 ° C, which allows you to perform work on the street;
    • long term of operation in compliance with safety precautions (7–10 years);
    • affordable cost.

    In order for nickel-cadmium batteries of screwdrivers to maintain quality, you should adhere to tips regarding the features of the operation of devices. Key recommendations:

    1. At each work, try to completely discharge the power element.
    2. Store the device in a discharged state.
    3. Do not put the tool to charge if the battery is not fully inserted.

    Nickel-cadmium batteries have a robust metal housing

    The main feature of nickel-cadmium batteries is the “memory” effect, because of which it is impossible to charge non-discharged devices because they are able to “remember” the remaining charge level. To prevent this from happening, the battery must go through a full charge / discharge cycle. It is under these conditions of use that the devices will last for the period of time promised by the manufacturer and provide the screwdriver with high performance.

    It is interesting! Metal hydride batteries are safer for the environment, but they discharge faster than cadmium batteries and have a high percentage of self-discharge.

    Li-ion battery for screwdriver

    Recently, lithium batteries for a screwdriver have been used very often, not only for power tools. This type of battery is found in almost every mobile device. Lithium-ion batteries appeared only at the end of the last century, but very quickly gained the lion’s share of the market. All this happened thanks to a lot of advantages. These include:

    • high level of capacity, increasing the period of uninterrupted operation;
    • compactness and light weight;
    • the absence of the “memory" effect, which allows you to recharge the device at any time;
    • low level of self-discharge;
    • the number of working cycles. more than 3000;
    • short time for a full charge;
    • lack of need for maintenance.

    Li-ion batteries feature high capacity

    The cathodes and anodes in lithium batteries are manufactured using lithium salt of various acids deposited on copper and aluminum foil. The electrolyte is a gel-like liquid. also based on lithium salt. A separator is used to separate the poles, and for safer operation, a valve is built into the casing, protecting it from excessive pressure.

    Lithium-ion batteries for a screwdriver have such disadvantages as:

    • high sensitivity to voltage drops in the network;
    • poor performance at low temperatures;
    • loss of capacity during prolonged storage of the device;
    • high price;
    • probability of spontaneous combustion.

    An undoubted minus is the fact that the service life of lithium-ion batteries usually does not exceed 3-5 years. At the same time, even those batteries that were not used become unusable.

    Video: Convert Bosch Screwdriver Battery To Lithium


    Battery may be updated periodically

    Lithium polymer rechargeable batteries

    Lithium-polymer power cells appeared after ionic ones, and in them the liquid electrolyte was replaced by a polymer one. Modern technologies have made it possible to increase the battery capacity and reduce the size of the product by using ultra-thin batteries. The main advantages of such batteries include:

    • lack of effect of "memory";
    • low explosion hazard compared to ionic options;
    • ensuring continuous operation without interruption;
    • resistance to mechanical damage and vibration loads;
    • fast charge for 20-30 minutes.

    Like the previous version of the battery, there are also drawbacks. The main one is that the number of work cycles does not exceed 500. It is also inconvenient that only a special “smart” charger for a screwdriver is suitable for the battery, which controls the required voltage level in each individual internal element.

    Battery-powered tool for long-term use

    Screwdrivers with such batteries have not yet received wide distribution, because they are distinguished by their high cost. Mostly lithium polymer batteries are used in professional premium models.

    Helpful advice! Screwdrivers equipped with lithium batteries are always easier to operate because they are lightweight. This is especially true if the tool needs to be moved.

    Which battery is better for a screwdriver and what indicators need to be compared

    Before choosing a battery, you need to conduct a comparative analysis of the models and pay attention to the characteristics that affect the usability of the screwdriver. It is impossible to state with certainty which particular option is considered the best, because all batteries have their advantages and disadvantages. First of all, you should understand how and where it is planned to use a screwdriver.

    When choosing a screwdriver, you must consider where you plan to use it

    Among the main important characteristics, the following deserve the most attention:

    1. The number of charge / discharge cycles. Lithium batteries are designed primarily for 1000–3000 cycles. Cadmium batteries require 1000 cycles, but often their life does not end there. Using devices, people invented ways to reanimate a screwdriver’s battery at home.
    2. Charging time. Sometimes, one battery is not enough to work, so masters prefer to immediately purchase two batteries. Ni-cd and Ni-mh charge in 2–4 hours, while 30–90 minutes are enough to fully charge a lithium battery, which significantly reduces the waiting time.
    3. Cost. The most budgetary are Ni-cd and Ni-mh. A Li-Ion battery is often twice as expensive as the previous versions and make up at least half the cost of the screwdriver itself.
    4. Tool power. To make holes in solid building materials and tighten large fasteners, you will need to use a high power device. In this case, the charge is actively consumed, and the maximum number of revolutions will depend on the reaction of the battery. At the same time, cadmium batteries have better performance than lithium.

    The charge indicator determines how charged the battery is.

    Other important battery features include:

    1. The effect of "memory". If you put a partially discharged nickel-cadmium battery on charge, the remaining level will be perceived by the battery as zero. During operation, it will be discharged exactly when it reaches the mark that remains in memory.
    2. Self-discharge. Even if the device is not in use, the battery gradually runs out in standby mode. Nickel-cadmium and metal hydride batteries thus lose up to 10% of the charge, lithium usually do not lose more than 5% per month.
    3. The size. The dimensions of the battery determine the final weight of the screwdriver itself and, accordingly, the convenience of working with it. This is especially true if you plan to continue working or holding the tool on weight. The heaviest batteries are Ni-cd and Ni-mh. Lithium batteries are typically 40-60% lighter.
    4. Work in the cold. Due to the fact that the cordless power tool is easy to carry, it is often used outdoors. Nickel batteries calmly withstand the effects of cold and are able to function even at 40 ° C, but lithium batteries in such conditions very quickly sit down or stop working.
    5. The need for full discharge. It is permissible to use cadmium batteries before turning off the device and then fully charging. As for the lithium version, it is recommended to plant it up to a maximum of 15%, and it is better to charge it by no more than 90%.

    Helpful advice! The battery charge can be checked using a special tool. indicator.

    All screwdrivers have different types of battery mounts

    Top manufacturers: Makita and Hitachi cordless batteries

    No matter how good the tool, sooner or later you will have to replace the battery in a screwdriver. When this happens, you will need to choose a new battery. To make it easier to make a choice, it is recommended to study the characteristics of well-known and reliable models.

    Related article:

    Technical characteristics of cordless drill / driver. The device and the principle of operation of the tool.

    "Hitachi" and "Makita". Japanese manufacturers, who are famous for high-quality power tools. Firms offer a choice of different types of batteries, differing in properties and characteristics.
    The most popular is a 14.4 V battery for a Makita screwdriver (model 193101-2 143). This appliance is equipped with a 2.4 Ah nickel-metal hydride battery. The main advantage is a quick charge for 1.5 hours. Among other advantages, we can distinguish:

    • possibility of use at a temperature of 40 ° C;
    • a large number of charging cycles. 2000;
    • lack of effect of "memory".

    The Makita screwdriver battery has a large number of charge / discharge cycles

    The cost of a Makita battery for a screwdriver is almost 6 thousand rubles. However, users did not note any shortcomings in the device.

    Budget options include a battery for a Makita 12 volt 193981-6 screwdriver. The nickel-cadmium battery is designed to operate in the temperature range from 10 ° C to 55 ° C. The main drawback of the battery for a Makita screwdriver is its small capacity of 1.3 Ah. Therefore, users note a fast charge.

    One of the best batteries for Hitachi screwdrivers is the EB1233X. This is a 3.3 Ah nickel metal hydride block. Thanks to this battery, the uptime of the tool is significantly longer than other models. The device is designed for professional use. The benefits include:

    • charging time. 1.5 hours;
    • strong case;
    • high-quality grip with the tool.

    The cost of the battery for a Hitachi screwdriver is 5800 rubles.

    Hitachi screwdriver battery has high-quality grip

    Batteries for a Bosch screwdriver and a budget analogue Bison

    Batteries for Bosch screwdrivers have established themselves as the most reliable and high quality. The company mainly uses lithium-ion and nickel-cadmium technologies, which contribute to high performance and convenient operation of the device. All modern batteries are equipped with Electronic Cell Protection, which prevents the device from overheating and completely discharging. There is also a function of automatic shutdown.

    All products of the company are distinguished by the presence of shockproof housing and low weight, which greatly simplifies the work with power tools. The capacity of various battery models varies from 1.3 to 5 A / h. In terms of voltage, options are available from 12 to 36 V.

    No less popular is the battery for a Bosch 12V screwdriver with a capacity of 1.5 Ah. Nickel-cadmium battery guarantees a long time of use of the tool even at full power, and is also compatible with screwdrivers of other manufacturers. The cost of the device is from 2500 to 3000 rubles.

    Helpful advice! Batteries from one company may be used for tools from another manufacturer. The main thing is to take into account their compatibility, which is usually indicated in the instructions.

    Bosch screwdriver batteries are equipped with Electronic Cell Protection

    Domestic batteries for screwdrivers Interskol

    The Russian manufacturer offers customers a wide selection of batteries. Particularly popular are Ni-Cd, which are characterized by their unpretentiousness in operation and a wide range of capacities. For batteries with an Interskol screwdriver, the capacity varies from 1.3 to 2.4 A / h. Choices are presented with different voltages. 12, 14.4 and 18 V. In general, the instrument is renowned for its good build quality and affordable cost for most users.

    Model DA-14.4ER. lithium-ion battery with a voltage of 14.4. The battery for the Interskol screwdriver weighs only 250 grams, and the capacity of the device is 1.5 A / h. The manufacturer focuses on the fact that the device can be used in the temperature range from 4 ° C to 40 ° C. This model is compatible only with screwdrivers of the same company. The cost varies between 1200-1600 rubles.

    A more powerful model is the 18-volt DA-18ER battery. In the production process, sodium-cadmium technology is used, the battery capacity is 1,500 A / h, which is enough to carry out a significant amount of work. For the device to reach full charge, it takes 120 minutes, although some users note that on average it takes about 3 hours to charge up to 100%. It should be noted the significant weight of the battery is 18 volts for a screwdriver, which is 750 grams. Its cost is about 1600-1700 rubles.

    Screwdriver batteries have different voltages

    The main types of breakdowns and battery repair for a screwdriver

    It is not difficult for an inexperienced user to identify failures in the tool. Among the main signs of damage are:

    • quick discharge during operation;
    • the presence of mechanical damage on the body;
    • Very slow or too fast charging.

    Before you start repairing batteries for a screwdriver yourself, you need to familiarize yourself with the main types of malfunctions. These include:

    • damage to contacts;
    • natural wear;
    • damage due to improper use.

    To check the integrity of the internal contacts, it is necessary to disassemble the battery and inspect the connections at the soldering sites. During the opening of the housing, the integrity of the remaining internal elements can also be evaluated.

    If the battery fails due to the end of its useful life, it is worth knowing that the total voltage of a 100% charged battery will decrease. To check this indicator, you need a multimeter, which not everyone has available. If the device has not been used for a long time, experts recommend carrying out 2-3 full discharge / charge cycles without loads.

    Professional chargers have several connectors for charging

    Important! You need to understand that not all batteries can be restored. Basically, craftsmen at home repair only nickel-cadmium and metal hydride batteries.

    A brief list of actions in case of battery failure looks like this:

    • disassembly of the device;
    • inspection of internal elements;
    • measuring the total voltage and each element of the chain.

    If a problem occurs with one of the mini-batteries, for example, it is swollen or has no voltage, it should be replaced, after which the device is assembled and fully charged. To disassemble the case is a task feasible to everyone. This will require a small screwdriver and, if necessary, a rubber mallet, with which it is easier to separate the parts.

    As with the purchase of any power tool, when choosing a battery, you must take into account the features of the operation of a screwdriver. It is best if during operation there are two batteries at hand that can be changed. It is important that the device is not only suitable for the tool, but also meets the necessary requirements.

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    How to Assemble a Makita Screwdriver Properly

    Operating a Makita screwdriver inevitably leads to wear on some parts of the mechanism. And in order to continue to use the tool effectively, it will take some repairs. The procedure for disassembling and repairing such equipment is presented below.

    Makita screwdriver device

    The Makita screwdriver is a fairly simple design, which consists of several main parts:

    • battery;
    • engine;
    • gearbox;
    • mode switch.

    In some models, additional devices may be added, however, the main components remain unchanged.

    How to Assemble a Makita Screwdriver Properly

    Inside, the Makita screwdriver device is quite simple. From the connection point of the battery, the wires go to the speed switch, as well as the start button itself, from which the contacts to the engine go. The front part of the engine is inserted into the gearbox, which consists of a whole set of gears of different configurations. The composition of the kit depends on the number of speeds or operating modes of the screwdriver. Modes are switched using a special controller that is brought out.

    In the gear reducer, gears with external teeth work in close connection with the housing itself, in which the teeth are located inside. And if in some parts the teeth are made of metal, then the plastic case itself includes plastic teeth. It is not surprising that such a structure wears out and fails over time.

    How to disassemble a Makita screwdriver

    In order to disassemble a Makita screwdriver, you must first disconnect the battery. Then, all the screws that hold the two halves together are loosened in the tool body. After that, the case is removed, and in front of the master, all external components are opened: the engine, gearbox and switch. It is also worth noting that in such models special plates are often installed that are responsible for switching modes. With not very careful disassembly, a small plate can simply not be noticed. After disassembly, you can immediately proceed to repair the corresponding part.

    How to repair a Makita screwdriver

    One of the most common problems with a Makita screwdriver is problems with first-speed operation. At the same time, at the second speed, everything functions perfectly. This problem is associated with a malfunction of the gearbox of the tool, which does not allow efficient use of the first speed. Consider how to get rid of this problem and repair a screwdriver.

    Gearbox disassembly

    The first step is to disassemble the tool itself and separate the gearbox. Now it is important to remove all unnecessary details at this stage. To do this, simply pour out all the gears from the gearbox. It is worth noting that if there is no information about the exact location of each part, it is better to disassemble it sequentially and accurately.

    Record and mark the location of the gears. This is necessary for high-quality assembly of the gearbox after repairs. You can also take advantage of tutorial videos or articles.

    Screwing in instead of teeth

    After all the gears are removed from the gearbox, the inside of the device will open to the eye. Given the specifics of the problem, most likely the master will see that all the plastic teeth on the inside were turned off. This occurs with prolonged use of the device, or with a gross violation of the rules of use. Plastic teeth are quite soft, so that under the influence of temperatures and constant mechanical stress, they simply grind. This leads to the fact that there is nothing to catch on the main gear and it starts to scroll.

    To repair and restore efficiency, it is necessary to restore the teeth. In this case, there is no need to restore all the teeth, but just install two iron.

    Video: How to Assemble a Makita Screwdriver Properly


    To achieve the desired need a drill, small bolts and a drill. It is advisable to use a drill with diamond spraying, as it will effectively drain off the extra part of the bolt in a relatively short time.

    Work execution order:

    1. At the location of the plastic tooth, a hole is drilled in the side wall of the gearbox. It is necessary to use a drill of slightly smaller diameter than the diameter of the bolt. So it will be possible to screw it with effort and provide reliable fastening.
    2. Two holes need to be drilled diagonally to ensure reliable gear retention and stable tool operation. Thus, the load will be distributed over two teeth.
    3. During drilling, it is advisable to direct the drill bit down so that then the bolt does not stick up. Otherwise, it will take much longer to process it with a drill.
    4. Now you need to force the screws into the holes obtained.

    Using a drill

    The bolts are machined laterally and, if necessary, shortened in length. It is necessary to give the bolts the shape of a real tooth and provide for the installation of the crown without interference.

    Important! It is not recommended to overheat a bolt during operation with a drill. Otherwise, it may become very hot and melt the surrounding plastic. The gear housing is deformed, which will lead to more serious problems. So during work you need to take breaks. To allow the bolt to cool.

    Once the teeth are ready, the gear ring can be inserted back. If everything is done correctly, then it will be inserted without any interference. Two teeth are usually enough to restore the gearbox to working, so screwing in more bolts is not logical.

    How to repair a screwdriver battery

    Battery powered screwdrivers are also very susceptible to battery wear. This occurs over time, even when used correctly. If you do not follow the rules of operation, the battery will cease to hold a charge very quickly. And in this situation, there are two ways: to purchase a new battery or try to repair the battery of a Makita screwdriver with your own hands.

    INThe second option will require a certain amount of time and effort, and the presence of special elements is also required.

    A screwdriver battery is a set of a number of special nutritional cans that are soldered to the charging controller and make up an integral structure.

    Appropriate nutrients can be found in power banks or laptops. There are also such banks in some numbers. In laptops, 6 cans are usually used, and in cans. 4. But the quantity may be different and depends on the battery capacity.

    Battery disassembly

    First of all, you need to disassemble the battery of a Makita screwdriver. To do this, it is disconnected from the screwdriver, and then all screws are unscrewed from it. The battery case opens and you can see the design of the element itself. There will be 10 cans soldered together and soldered to the power controller.

    It is necessary to disconnect the banks from the board. For this, a drill with a special nozzle is used.

    Disconnecting the cans from the board

    Using a drill with a disk nozzle, the banks are cut off from the board. The connections of each contact with the controller are sequentially removed, and also the elements are disconnected from the common frame.

    You need to do this quite carefully so as not to damage the board itself, but hard enough to completely disconnect it.

    Soldering new cans

    Immediately after the frame and the board are released from the old batteries, new ones can be attached to them. Before soldering, it is recommended that you clean the surfaces on the banks and on the board itself from the remnants of the previous soldering. This will allow for better contact for the long term.

    Now all new banks from other devices are placed in the appropriate places on the frame and in turn are soldered to the power controller. It is recommended to do this with a thick nozzle on a soldering iron, since a lot of solder is needed. Contact must be very reliable and have a large area of ​​contact.

    After sequential assembly, it is recommended to wrap the entire structure in special paper and place it back in the housing. Then the battery is reassembled and closed with a cover, which is mounted on the screws.

    Before use, the battery must be recharged at a special station to full capacity, and only then connect it to a screwdriver for inspection. If everything is done correctly, the battery will again become operational.

    Replacement cans can be obtained from other batteries or purchased separately. The cost for them is pretty decent, but still manual replacement will cost much cheaper than buying a new battery.

    How to assemble a Makita screwdriver

    The Makita screwdriver must be assembled in the reverse order. A gearbox, an engine, a switch and a mode change plate are installed in one half of the case. After fixing all the elements, it is necessary to install the top cover and tighten all the screws. After all these manipulations, you can connect the battery to the tool and continue to work.

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