The screwdriver does not grip the bit reason

Table of Contents:

Dignity

  • there is overload protection;
  • fixing the tool on the belt;
  • illumination of the working area;
  • convenient setting of the twisting force.

BEST WAYS TO LOOSEN A STUCK SMALL SCREW

disadvantages

  • high price;
  • no impact function.

Dignity

  • spotlight lamp;
  • the power button is locked;
  • the handle is rubberized on all sides;
  • belt clip.

Hitachi WM18DBL 33 Nm

We considered the screwdriver to be the best because this brushless model has an impact function. Thanks to tapping with a striker on the chuck, screwing in the screws is much faster. In case of dismantling, the impact mechanism will help to move old fasteners out of place.

BOSCH GSR 18 V-EC TE 0 25 Nm

Makita DF332DWAE 35 Nm

In the penultimate place is a brushless kid with a rubberized handle and a keyless chuck. It has a two-speed gearbox and reverse. Fastener screwing hardness adjustment has 20 steps. The illumination directly under the chuck is not obscured by the user’s hands and is directed exactly to the working area. The kit already has two batteries 2.0 A / h. The maximum rotational speed is reached at 1500 rpm. For long-term operation, the start button can be locked to relieve stress on the hand.

The brushless model is notable for a weight of 1 kg and a length of 154 mm, but its power is inferior to those described above due to the power supply from the battery 10.8 V versus 18 V, so the tightening rigidity here is only 35 Nm. Another compact screwdriver is capable of clamping shanks with a maximum diameter of 10 mm, which is also below the rating of the leaders in the review. We recommend using this drill for repairing household appliances, since the tool fits easily inside the case of a washing machine, refrigerator or microwave oven.

disadvantages

  • there is no clip for quick hanging;
  • the cartridge has a slight backlash;
  • the second handle scratches the gear case.

Dignity

  • rubberized body;
  • two speeds of work;
  • weighs 1.1 kg;
  • quick hanging on the belt.

How to replace a screwdriver chuck

It will not be easy for an untrained user to replace it, because without the help of a special tool with your bare hands, you will not be able to do it. There are two ways in which it can be removed, and we will consider them further in our article. In order to change it, you should pay attention to the steps that we described in the article above. Dismantling is carried out with the following tools:

  • Hex wrench. This is usually a 10mm L-shaped metal bar. It is necessary to fix its short part in the chuck, the long one must be resting against something, for example, on a table. We turn the cartridge, then remove it by turning the key.

We looked at the way to dismantle using a key. The way to remove the element manually is described above.

Screwdriver chuck: description, function

The cartridge is a metal cylinder with a cavity inside, equipped with a ring and a regulating sleeve. It is fixed on the shaft. With its help, the drill or grinding attachment is securely fixed in it for further work. The fixation of the working body of the tool (drill) is provided by the thread. The drill is tightened in it in two ways. The first method consists in tightening it with a special key, in the second method, the drill tightens when the chuck is rotated in the direction opposite to the axis of rotation of the drill.

DIY screwdriver repair with cartridge play

A slight backlash within 1 mm usually does not create visible problems during operation. With a larger value, pay attention to the condition of the gearbox. So, the procedure is as follows:

  • We unscrew the bolts securing the upper cover of the tool. We take it off.
  • We unscrew the electric motor from the gearbox. Inspecting the mounts.
  • We disassemble the gearbox. Often the cause of breakage is a malfunction of the bushing inside. It is possible to remove the bushing using the steps described at the beginning of the article (see how to remove the cartridge manually). The sleeve is easily pressed out by hand.
  • We are replacing the bushing. Then we collect everything in the following sequence: bushing, shaft, bushing bearings, retaining ring. Lubricating rubbing parts.
  • After that, in the reverse order, we assemble the gearbox. We attach it to the electric motor.
  • We collect the screwdriver body.

How to remove and repair a screwdriver chuck with your own hands

Today, many people use such a tool as a screwdriver, so it is not surprising that there is a high demand for them. Very often the device breaks down, and the buyer rushes to the repair shop, paying money for the repair. You don’t always want to do this, of course, so in our article we will help you familiarize yourself with the screwdriver device in more detail. Some problems can be dealt with on your own.

We will consider various cases of screwdriver breakdowns, namely: we will deal with the most frequent breakdowns of such an important part of the tool as the chuck.

DIY screwdriver repair when the chuck beats

The main culprit for this problem is the screwdriver gearbox. To make sure of this, you need to remove it by disassembling it in the above way. This particular failure may indicate several problems in the gearbox, which we will point out below. The reason may be:

  • violation of the geometry of the gearbox shaft;
  • production of gears;
  • malfunction of the shaft support bearing;
  • wear of pins fixing planetary gear satellites.

The above parts are produced only in factories, so you won’t be able to make them yourself. You just have to purchase them and replace the failed ones.

DIY screwdriver chuck repair

This is a movable element of the tool, which consists of many rubbing parts. In the process of work, it is subject to wear resulting from the action of friction forces, impact forces and other factors on it. The beating of the cartridge, its excessive backlash can frighten an inexperienced craftsman. In some cases, it is not always possible to allocate time or money to contact a repair shop. Therefore, we will consider how you can do it yourself when repairing various tool malfunctions.

How to disassemble a screwdriver chuck

Despite the fact that today there are many models of screwdrivers on the market, they have one general approach to removing such an element as a chuck. We will now briefly describe it.

In order to unscrew it, you need to remove the screw that secures it to the shaft. It is located inside the chuck, the screw should be rotated clockwise. After you unscrew the screw, jerk the cartridge in the opposite direction with a jerk.

Attention! When you try to unscrew it by hand, you must put the drill at the second speed, if it is two-speed. When buying a tool, it is advisable to lubricate the screw with machine oil. In some cases, when this element does not want to give in, then you should put the tool at the first speed, hold it in your palm, and turn on the reverse to the left. The chuck should come off the thread easily.

Screwdriver chuck thread

Structurally, this movable element is fixed in the tool body in three ways:

  • Fastening with a Morse taper.
  • Threading.
  • Securing the set screw.

Fastening with a Morse taper has been known for a long time and is as follows. The shaft has the shape of a cone, repeating the outline of the surface inside the chuck. the same cone. By combining them in a certain way, you get a reliable connection.

Docking the shaft with the chuck using a threaded connection consists in the presence of a thread at the end of the shaft, onto which a chuck with the same thread can be freely screwed.

The fixing screw is most often used as an additional fastener. Its head has notches for a Phillips screwdriver, as well as a left-hand thread. You can see this screw by unscrewing the cams that close it.

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To find out what kind of mount your instrument has, you need to carefully inspect the body of the instrument. The designation for each type of attachment is different. For example, this: 1–6 В 10 will mean that the chuck is fixed by means of a B10 Morse taper, and nozzles with a shank diameter from 1 to 6 mm can be used to it. If there is such a record: 1.0–11 M 12 x 1.25. you will know that you should use nozzles with shanks from 1 to 11 mm, the metric thread has a section of 12 x 1.5 mm. Foreign manufacturers use indicators in inches, for example, 1.0-11 ½. 20 UNF.

In this article, we examined the main problems that arise during the operation of the tool, paid attention to such a responsible unit in the design of the screwdriver as the chuck. Together with this, we figured out how it is attached to the structure of the screwdriver, gave some advice on how to repair it with our own hands, and also tried to outline in general terms ways of solving repair problems.

How to disassemble a screwdriver chuck

Despite the fact that today there are many models of screwdrivers on the market, they have one general approach to removing such an element as a chuck. We will now briefly describe it.

In order to unscrew it, you need to remove the screw that secures it to the shaft. It is located inside the chuck, the screw should be rotated clockwise. After you unscrew the screw, jerk the cartridge in the opposite direction with a jerk.

Attention! When you try to unscrew it by hand, you must put the drill at the second speed, if it is two-speed. When buying a tool, it is advisable to lubricate the screw with machine oil. In some cases, when this element does not want to give in, then you should put the tool at the first speed, hold it in your palm, and turn on the reverse to the left. The chuck should come off the thread easily.

DIY screwdriver chuck repair

This is a movable element of the tool, which consists of many rubbing parts. In the process of work, it is subject to wear resulting from the action of friction forces, impact forces and other factors on it. The beating of the cartridge, its excessive backlash can frighten an inexperienced craftsman. In some cases, it is not always possible to allocate time or money to contact a repair shop. Therefore, we will consider how you can do it yourself when repairing various tool malfunctions.

The chuck of the screwdriver does not grip the bit

Any user of a screwdriver has encountered a problem like a jammed chuck. It is constantly exposed to vibrations, dynamic and shock waves. The screwdriver gets metal shavings, small mechanical particles, dust. which leads to malfunctions of the mechanism after a certain period of time. The article will talk about how to open a jammed screwdriver chuck.

The chuck is the fastener where the drill is fixed. Usually, standard drills are equipped with a cam type.

Cases when the screwdriver fasteners are jammed:

  • The jaws do not move and the jammed drill or bit cannot be removed. During this, the jaws are not compressed evenly, which makes it difficult to secure the drill.
  • When using a drill of too large a size, the cams are opened to the maximum, as a result of which it is not possible to bring them together, by applying great forces.

In rare cases, the jaws get jammed during their free movement when unclenching or squeezing. in most cases this is provoked by particles of debris, shavings, scale and others that fell under the curly part of one of the cams.

Professionals advise, first of all, inside the chuck, which includes the surface of the cams, to fill in a universal grease such as WD-40. This is recommended for any cause of jamming. After ten to fifteen minutes, tap it and the cams with moderate force with a conventional hammer through the gasket or with a rubber.

From this vibration, he will loosen his grip and free the instrument. If necessary, after the introduction of the universal grease, the cartridge can be slightly warmed up with a hairdryer. In addition to WD-40 grease, machine oil can also be used.

One way or another, it takes time for the liquid to penetrate deep enough inside, where its point of contact with the drill is located. This method is suitable for owners of both standard fasteners and quick-release fasteners.

In the event that the bit is jammed, then after lubrication, the problem is quickly solved by using 2 adjustable wrenches.

With the help of one, the base of the chuck is compressed, while the other gently rotates its upper part. In order not to damage the surface and the knot itself, it is recommended to use soft and dense pads like leather.

In addition, to open the cartridge, it is necessary for it to cool down. In some cases, this action alone is sufficient for the cams to release the drill and it can be removed.

The last method is considered to completely immerse the drill in machine oil or vegetable oil for one hour. In the event that it is absent, you can use gasoline. When combining the above methods, it will be much faster to get it.

If the problem cannot be solved on your own, it is worth resorting to the help of competent workshop specialists who will eliminate the malfunction in a short time.

And “what methods do you know for curing a jammed cartridge from a screwdriver?

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Today, many people use such a tool as a screwdriver, so it is not surprising that there is a high demand for them. Very often the device breaks down, and the buyer rushes to the repair shop, paying money for the repair. You don’t always want to do this, of course, so in our article we will help you familiarize yourself with the screwdriver device in more detail. Some problems can be dealt with on your own.

We will consider various cases of screwdriver breakdowns, namely: we will deal with the most frequent breakdowns of such an important part of the tool as the chuck.

Screwdriver chuck: description, function

The cartridge is a metal cylinder with a cavity inside, equipped with a ring and a regulating sleeve. It is fixed on the shaft. With its help, the drill or grinding attachment is securely fixed in it for further work. The fixation of the working body of the tool (drill) is provided by the thread. The drill is tightened in it in two ways. The first method consists in tightening it with a special key, in the second method, the drill tightens when the chuck is rotated in the direction opposite to the axis of rotation of the drill.

DIY screwdriver repair with cartridge play

A slight backlash within 1 mm usually does not create visible problems during operation. With a larger value, pay attention to the condition of the gearbox. So, the procedure is as follows:

  • We unscrew the bolts securing the upper cover of the tool. We take it off.
  • We unscrew the electric motor from the gearbox. Inspecting the mounts.
  • We disassemble the gearbox. Often the cause of breakage is a malfunction of the bushing inside. It is possible to remove the bushing using the steps described at the beginning of the article (see how to remove the cartridge manually). The sleeve is easily pressed out by hand.
  • We are replacing the bushing. Then we collect everything in the following sequence: bushing, shaft, bushing bearings, retaining ring. Lubricating rubbing parts.
  • After that, in the reverse order, we assemble the gearbox. We attach it to the electric motor.
  • We collect the screwdriver body.

How to replace a screwdriver chuck

It will not be easy for an untrained user to replace it, because without the help of a special tool with your bare hands, you will not be able to do it. There are two ways in which it can be removed, and we will consider them further in our article. In order to change it, you should pay attention to the steps that we described in the article above. Dismantling is carried out with the following tools:

  • Hex wrench. This is usually a 10mm L-shaped metal bar. It is necessary to fix its short part in the chuck, the long one must be resting against something, for example, on a table. We turn the cartridge, then remove it by turning the key.

We looked at the way to dismantle using a key. The way to remove the element manually is described above.

DIY screwdriver repair when the chuck beats

The main culprit for this problem is the screwdriver gearbox. To make sure of this, you need to remove it by disassembling it in the above way. This particular failure may indicate several problems in the gearbox, which we will point out below. The reason may be:

  • violation of the geometry of the gearbox shaft;
  • production of gears;
  • malfunction of the shaft support bearing;
  • wear of pins fixing planetary gear satellites.

The above parts are produced only in factories, so you won’t be able to make them yourself. You just have to purchase them and replace the failed ones.

Screwdriver reversing switch

The reversing switch of the screwdriver plays an important role when performing work on screwing in self-tapping screws, as well as removing them if necessary. The reverse circuit of the electric motor is located in the same housing with the speed controller, and the speed redirection switch itself is located in a convenient place on the handle.

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Start and reverse buttons, located side by side

Switching is carried out by changing the polarity on the terminals by moving the reverse button. Repairing the entire reverse circuit, including the PWM generator located on the board, is reduced to cleaning the switch contacts and replacing the reverse circuit with a new one.

Faulty battery or screwdriver cable

Everyone understands that regardless of the “steepness” of the perforator without an energy source, its work is impossible. Therefore, first of all, you need to check the serviceability of the battery if you have a mobile perforator and does not depend on the power source. The main reason for the inoperability of the battery is its discharge or long-term operation. The second reason is eliminated by a complete replacement of the battery, and the first by a simple recharging using the rectifier supplied with the sale of the tool.

Screwdriver battery disassembled

As a rule, two batteries are included in the same kit: one is in action, that is, in operation, and the other is being recharged. In case of failure of the charger, it will be more rational to replace it with a new one, unless, of course, you are not an expert in radio electronics.

If you are the owner of a power screwdriver, first of all, if the motor does not rotate, check the entire chain of the electric drive: the socket, the cable plug and the cable itself. Believe me, it often happens that the socket fails (contacts burn out), the cable plug may fail for the same reasons, and the cable itself can be damaged as a result of careless handling.

Failure of the start button of the screwdriver

Start button (red) of the screwdriver

It is not difficult to get to the failed start button: you need to unscrew all the self-tapping screws connecting the two halves of the tool body using a Phillips screwdriver. Next, using an electric soldering iron, disconnect the button wires from the electric motor, disconnect the terminals connecting the button with the battery or the mains power cable and remove the problem from the case. In its place we insert a new button, carry out the connection process in the reverse order and check the operation of the new part by connecting it to the battery or power cable.

Stages of disassembling the screwdriver button

Screwdriver engine speed is not regulated

The lack of adjustment of the screwdriver engine speed significantly reduces the convenience when working with the tool, and also makes it impossible to perform high-quality work. The regulator is located in close proximity to the start button or is made with it as a whole, however, the speed regulator transistor is attached to the electric motor where it is cooled through the radiator grilles.

Location of the motor speed controller (7)

As practice shows, in the event of a similar problem, it would be more correct to replace the speed controller completely with a new one. Fortunately, they are on sale and are relatively inexpensive. All attempts to repair it led to the same conclusion, unless, of course, you are an expert in the field of electrical engineering.

Runout of the screwdriver chuck

The runout of the screwdriver chuck indicates that there is a problem with the gearbox of the tool, which is located just behind the electric motor. This is another reason why a full recoil screwdriver does not work.

Screwdriver Planetary Gearbox Parts

The output shaft of this gearbox is the place where the chuck is attached, so if we talk about the runout of the chuck itself, one must bear in mind the runout of the gearbox shaft. The reasons for this may be the following:

  • a) bending of the gearbox shaft;
  • b) wear of the gears of the reducer;
  • c) failure of the support bearing of the gearbox shaft;
  • d) the limiting development of the pins on which the planetary gear satellites are attached.

All of the above parts are of factory origin and cannot be repaired. The problem of the beating of the screwdriver chuck in this case is solved by replacing the gearbox parts with new ones.

Why the screwdriver does not work

Repair or installation of furniture is in full swing, and the screwdriver has stopped working. Consider the main causes of breakdowns and how to repair a screwdriver with your own hands (the video will also help us with this). To answer the question why the screwdriver does not work, and how to repair it, you need to have an idea about the device of the screwdriver, its main units, among which the following can be distinguished: a gearbox, a reversing device, an electric motor, a speed controller, and if the tool is autonomous. a battery (battery charger battery).

over, both expensive and cheaper screwdrivers basically have a similar device, which differs from each other by the presence of certain advanced options. From here, one can single out the main reasons why the screwdriver does not work, which almost all models suffer to one degree or another:

  • The first thing you need to pay attention to is the health of the battery or the breakdown of the electrical cable from the network (mains screwdriver).
  • Failure of the trigger button of the tool.
  • Not regulated or poorly regulated engine speed.
  • Impossibility of reverse switching.
  • Chuck runout.
  • The electric motor does not rotate.

The electric motor of the screwdriver does not rotate

Screwdriver motor malfunctions are not much different from similar problems with an angle grinder, drill and other power tool. The first thing that can be the reason why the screwdriver does not work is the wear of the electric motor brushes, which can be easily replaced with new ones that are not very expensive. The second reason is the failure of the armature or stator winding of the motor.

The appearance of the electric motor of the screwdriver

Most often, an interturn short circuit occurs due to a violation of the insulation of the winding wires. A short circuit can occur due to overheating of the electric motor from, so to speak, overwork, that is, you need to let the tool cool down in time, give it a “rest”.

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By the way, overheating of the screwdriver can lead to leakage of lubricant from the gearbox, which will lead to the failure of its main parts, which were mentioned above.

Another problem can be observed in the armature of the electric motor: contamination or oiling of the collector, which transfers electricity to the motor from the brushes.

Electric motor brushes and screwdriver

The collector can be repaired at home on your own by rinsing and cleaning it with fine emery cloth. But the stator and armature windings will have to be restored in a specialized workshop or the motor will have to be completely replaced with a new one.

In conclusion, I would like to note that the screwdriver will work for a long time and efficiently if you treat it carefully, without showing “fanaticism” during its operation.

How to remove and change the cartridge

For the safety of the work carried out, to keep the mechanical and electrical parts of the device in good working order, the cartridge should be repaired or replaced. To do this, you will have to perform a small dismantling operation:

  • It is necessary to spread the cams to the side, unscrewing the outer rotating part of the chuck until it stops.
  • Then use a Phillips screwdriver to unscrew the screw (clockwise) that secures the head to the spindle.
  • The next stage is more convenient to carry out armed with an auxiliary tool. A gas wrench of a suitable size can be used. The appliance must be placed on the table. The chuck is rigidly fixed in the jaws of the key, and the lever is rotated counterclockwise with a sharp movement.
  • Now it remains to install the replacement, not forgetting to fix it with a screw on the spindle.

Why the screwdriver does not grip the bit and what to do

When using a hand drill, some people are faced with the problem of removing the bit from the chuck. With intensive work, the cams can be pressed against the replaceable part with great force and even jammed, so it can be difficult to turn the chuck even with a special key. The inverse problem, when the screwdriver does not grip the bit, occurs less frequently and is characteristic of a faulty fastening. What to do if the bit is not fixed properly will be discussed in the article.

Causes and types of malfunction

Incorrect operation of the fastening mechanism, when the screwdriver does not grip the bit poorly, may cause wear of one or more of its elements. On the outside of the cams there are teeth that engage with the rotary gear and, when twisted, move upward along a tapered guide, clamping the drill shank. When grinding the teeth on the cams or on the gear, the downforce is insufficient to hold the bit securely.

There is an option when the cams, although they do not converge completely, but up to a certain diameter can provide the required amount of pressure. Then a temporary solution is possible. Wire is wound on the shank of the bit (the best material is copper), increasing the diameter and thus tightly tightening the improvised structure. These are extreme measures that allow you to realize the capabilities of the tool only if absolutely necessary.

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Can it be repaired

As you can see from the information provided, most often the screwdriver chuck does not grip the bit due to wear of the fasteners. The most realistic option is to replace the entire broken node. The possibility of repair depends on the specific modification of the electrical appliance.

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In what way is it fixed
drill chuck on tool

An external examination of the power tool, it is often not possible to determine in what way the drill chuck is fixed. But if you know the markings, then the mounting method will be determined even with a cursory glance at the cartridge.

Repair of a drill, screwdriver
How to replace the drill chuck

Even the most reliable branded power tool, such as an electric drill, hammer drill or screwdriver, not to mention a Chinese-made tool, over time, depending on the intensity of use, wears out and starts to hold drills, bits poorly, or the chuck gets jammed.

The same fate befell the patron of my electric drill, which has been serving faithfully for more than 12 years. The malfunction began to manifest itself with jamming, expressed in the difficulty of rotating the squeezing ring. In addition, water got inside the cartridge during the renovation of the apartment, and a coating of rust appeared in the guide grooves of the cartridge cams. The running surfaces of the cams are also worn out. Although the drill chuck was still working, changing drills was extremely inconvenient. I decided to replace it with a new one, and then the question arose, but how to remove the cartridge from the drill shaft?

Drill chuck mounting methods

In order to answer the question of how to remove the drill chuck, you need to understand the existing methods of attaching the chucks to the shafts of drills and screwdrivers.

There are two ways to attach the chuck to the power tool. The first method was proposed back in 1864 by Stephen Morse using a cone. Morse, by the way, is also the inventor of the twist drill. The essence of the method consists in mating two surfaces in the form of a shaft and a part with a hole, having the same taper with an angle ranging from 1 ° 25’43 “to 1 ° 30’26”. In honor of the inventor, this method of fastening was named the Morse taper, which is shown in the photo below. The cone in the photo has a larger angle for clarity.

The method of fastening on a Morse taper is widespread, since it is simple and sufficiently reliable under loads along the axis, as in drills and screwdrivers. To fasten the drill chuck, it is enough to put it back on the shaft with a Morse taper with a little effort. The cartridge is also removed simply, it is enough to strike its body along the axis in the direction of the drill installation with a hammer. The ability to quickly install and remove the tool during operation is the main advantage of fastening with a Morse taper.

The second, currently more common for attaching the drill chuck to the shafts of power tools, is a threaded.

At the end of the shaft coming out of the drill or screwdriver, a metric or inch thread is cut and the drill chuck, like a nut against the flange, is screwed onto this shaft. Since the thread is right-hand, and during work, the chuck mainly rotates clockwise, it is constantly tightened and thereby ensured its reliable attachment to the tool.

How to unscrew a cartridge from a drill
screwed

As a rule, chucks that are threaded onto the tool shaft are additionally secured with a left-hand screw. Therefore, the removal of the drill chuck must be started by unscrewing this screw. In order to get to the screw, the chuck jaws must be sunk in as far as possible, as shown in the photo.

The head of the slotted screw for a Phillips screwdriver or an asterisk should appear on the bottom of the cartridge in the center. To prevent the screw from loosening during drilling, it is installed with a left-hand thread. Therefore, it is necessary to unscrew the screw by turning the screwdriver clockwise. There may not be a screw. In this case, immediately proceed to the second step. unscrewing the cartridge.

How to unscrew the chuck from the shaft of a drill or screwdriver

To remove the chuck from the tool, you need to fix the shaft and, grasping the chuck by the body, screw it, turning it counterclockwise, when viewed from the side of the cams. The main thing is to rip the cartridge off the ground, then it usually easily unscrews.

screwdriver, does, grip, reason

I was lucky, since there were chamfers on the round base of the chuck, which could be well hooked with an open-end wrench.In the chuck purchased for replacement, there were no such samples.

After gripping the chuck with an open-end wrench and one sharp blow on the key with a hammer, even without fixing the shaft, as in the photo, the chuck moved from its place. But it turned off tight, and there was a reason for this. I had to continue to twist it with light blows on the key with a hammer.

Looking inside the cartridge, I did not notice the fixing screw because the hole in the head for the asterisk bit was clogged with dirt, which just had to be removed. Therefore, unscrewing the cartridge, I simultaneously tore off the thread of the fixing screw, it is strange that it did not break off.

If there are no chamfers on the base of the chuck, then you need to clamp a hex bar or an M10-12 bolt with a hex head in its jaws, onto which you put a key and hit it with a hammer. If you cannot screw the chuck in this way, then you will have to disassemble the drill, remove the shaft with the chuck, clamp it in a vice and twist it. Instead of an open-end wrench, you can use a pipe wrench by grabbing the chuck by the outside of the housing.

Drill chuck marking
fastened with a thread

Both metric and inch threads are used to attach the drill chuck to the tool using a thread. Cartridges of a domestic manufacturer, as a rule, are produced with a metric thread, and an imported manufacturer is always with an inch.

A drill chuck with a metric thread is usually marked on the body as follows: 1.5-13 M12 × 1.25. The numbers 1.5-13, as you probably already guessed, mean the diameter of the shanks of drills or other tools that can be clamped in this chuck. The letter M denotes that the thread is metric, the numbers 12 and 1.25 denote the thread diameter and thread pitch, respectively. Currently, drill chucks with a metric thread are practically not found, except that such a chuck can be seen on an old Soviet-made hand drill.

Currently, the market is filled with power tools from a foreign manufacturer, and the drill chucks on it are usually attached using an inch thread.

Drill chucks with inch threads are marked in the same way as chucks with metric threads. For example, 2-13 mm 1/2 –20 UNF as shown in the photo. Numbers 2-13 indicate the range of clamping diameters of the drill shank, 1/2. thread diameter in inches (for reference, one English inch equals 2.54 cm), 20 indicates the number of threads per inch (thread pitch).

Having learned the rules for marking drill chucks, now you can easily determine how it is attached to the tool and can choose the correct technology for replacing the chuck. Marking also allows you to purchase an interchangeable chuck in case of wear or breakage on a drill or screwdriver.

What is the method of clamping
drill chuck better

In household drills and screwdrivers, one of the types is usually installed according to the method of clamping the working tool of the cartridges, this is with a key and quick-clamping. Key jaw chucks have been around for a long time and are familiar to any home craftsman. Keyless chucks have recently come into use and quickly become very popular.

In the photo on the left you can see a keyless chuck, and on the right. a key with a key. There is an opinion that the key chuck grips drills better, but from many years of experience in operating both the key chuck and the key chuck, I dare to say that there is no difference. Both types of cartridges are clamped with equal success. Only the convenience and speed of changing drills in a drill with a keyless chuck is undeniable. You do not need a key, which is always lost during work, if it is not attached to a drill or tied to it on a rope, you need to use two hands to clamp the drill.

The method of chuck clamping is not related to the method of its attachment to the drill shaft, therefore, if you change the chuck with a key clamping method, I advise you to install a chuck with a quick-clamping method for fixing the drills instead.