How to remove the chuck from a Bosch electric screwdriver

Instructions: How to remove the chuck from an electric screwdriver

Some people wonder how to remove the chuck from an electric screwdriver. This is required for preventive and repair work. Doing the necessary work with your own hands can save you money. There are several kinds of cartridges, each of which has its own characteristics.

It is a hollow cylinder of metal that holds a special ring with an adjusting sleeve. This element is mounted directly on the shaft. Using a tapered or threaded surface, the drills are secured.

A screwdriver, hammer and a few wrenches are required to disassemble the chuck. If you have a vise, the task will be easier.

Types of fastening

It is necessary to study the markings to determine the type of attachment. If 1. 6 B10 is specified, Morse taper is used. The figures indicate the diameter of the shank and can be different.

Marking 1.0. 11 M12x1.25 indicates use of threaded fastening method. There is no fundamental difference in how the fastening method is used, it all depends on user convenience.

Types of chuck mounts

Cartridges are most often attached to the shaft in these ways:

Morse cone one of the easiest and most practical methods, which began to be used since the 19th century. The plane of the shaft is machined as a cone with assigned parameters. The same cone is in the middle of the chuck. When they are combined, there is a quick and firm connection of the component parts.

The next method has a thread that is cut on the edge of the working shaft of the power tool.

The fixing screw is used for additional connection of the screwing chuck on the shaft. As a rule, a screw has a Phillips head and a left-hand thread. It is necessary to unscrew the cams at the chuck as much as possible in order to see it.

Types of Chucks

Very often home craftsmen are faced with such a difficulty as jamming elements, and few know how to change the chuck on the screwdriver in the right way. First, it’s worth understanding the basic types.

Screwdrivers are available with several varieties of chucks, which are sold in stores. They differ somewhat in their design as well as the method of attachment.

Sometimes self-clamping devices are put on the units, but these varieties are more popular.

Quick-clamp chuck for cordless screwdrivers is subdivided into several other classifications.

• Two-coupling. This variety has to be tightened with two hands, because one of the clutches must be supported, and the second must be turned with a special wrench.
• Single clutch. In this case, it is necessary to perform all the same steps as in the first variant, but everything can be done with only one hand. This has been achieved by incorporating a special locking mechanism that automatically jams the shaft when the tool is removed. The bit fits on such a design more easily and conveniently.

The quick-clamp model is distinguished by the fact that during operation it is not necessary to use any additional tools. For example, it is not necessary to use a wrench.

Chucks are made of two materials:

Thanks to the plastic design, manufacturers have significantly reduced the weight of the unit. But we cannot say that such material is reliable. It will not be able to withstand high impact loads and is not very stable, unlike a metal screwdriver.

Plastic and metal quick-clamping mechanism is used for both professional and domestic tasks.

Metal units are more reliable, they have high strength, and therefore are able to withstand high shock loads. This is especially important for those devices that have an impact function.

Ways of securing

There are a number of proven ways in which a chuck can be securely fastened to a device. Among them, the following are distinguished:

With screws.

How to attach

In screwdrivers or drills, a tool holding device for fastening the tool can be fixed in two ways. on the thread or cone.

To fix in the first way on the shaft of the tool and the inner cavity of this product is performed by threading. It can be mounted using either metric or inch threads. Exactly which threads are used to fit this tool can be determined by looking at the markings that are usually stamped on the body of the fixture. For example, if the inscription reads 1-15M13×1,3, it means that this product has M13 internal thread, and the numbers 1. 15, mean the limit dimensions of the tool that can fix the jig.

If an inch thread is used to secure this tooling, but the abbreviation UNF is applied to the body. That is why it is necessary to check the correspondence of markings and dimensions in this tool before replacing it.

The second way to mount it on the tool is to use a Morse taper. The end of the tool shaft is shaped like a cone. The mating piece is formed in the body of the tool. It is fixed on the shaft. It is marked as B10, B12, B16, B18. This is the fastening method most commonly used for screwdrivers.

How to know what method of fastening the chuck

There are several ways of fastening technological equipment. How do you know which method of fixing was used for it? Which way this tooling is fixed to the shaft of an electric screwdriver is quite simple. To do this, just look at the markings. If it says M13, it means that it was secured with a thread. If you see B12 in the marking, it means that the chuck is mounted on the Morse taper.

There are a lot of companies on the market that produce screwdrivers and, as a rule, each model has its own little secrets, including the way of fixing the chuck.

But the principle of its removal is the same and differs slightly from each other.

There are a number of ways to remove this fixture:

• Using the hexagon. It is necessary to use a hex key, the short arm fastened in the device. The size of the hexagon must be at least 10 mm. Set the electric screwdriver to low speed mode and turn it on so that the long arm of the hexagonal key rests against the table. After this operation the threads will be loose and the fixture can be removed by hand.
• If the harness is fixed by a retainer, you should first remove it and then repeat the operation described in point 1. Locking screw has a left-hand thread.
• If the methods described above did not work, you should disassemble the body and remove the part where the gearbox, shaft and chuck are mounted. To remove this part it is necessary to use a pipe (gas) wrench.
• To disassemble a fixture installed with Morse, a hammer must be prepared with which the chuck can be removed.

No great effort is needed to remove the chuck from the electric screwdriver.

Dimensions and marking

Before disassembling an electric screwdriver, you must determine the type of cylinder fixture. The marking will tell you. The inscription of the type 1-6B14 indicates the type of Morse taper fixation, where the digits before the letter are the diameter of the bit shank in millimeters and after the letter are the size of the tapered hole. There are 9 articles. from B7 to B45.

For chucks with threaded fastening there is a marking of the type 1.5-13 M12x1.25. Here the numbers before the letter also show the permissible diameter of the bit’s tail end, and the thread dimensions in millimeters are after the letter.

Important! Foreign screwdrivers use a marking in inches. it looks like this: 2-13 1/2. 20 UNF. 1/2 means “inch” and 20 means the number of threads per inch.

Signs of chuck failure

It’s not hard to spot any abnormalities in the normal operation of the power tool head:

• The cylinder does not fit securely on the shaft.
• The drill bit has begun to give a serious backlash.
• Cams become jammed or do not come out completely.
• The chuck is spinning.
• The screwdriver cannot be clamped or pulled out.

As soon as these signs appear, it becomes difficult to work with an electric screwdriver, and it is dangerous to your health.

How to use a screwdriver

It is possible to ensure the long functioning of the tool if you adhere to the simple rules of operation:

• Protect the power tool from moisture;
• Always adjust the tool before using it;
• Switch off the battery when changing accessories;
• if you are not using the screwdriver for a long time, periodically start it up to discharge the battery;
• have several spare batteries.

Any man can change a screwdriver chuck in his home workshop. Using the methods described above, you are guaranteed to finish the job quickly and with a minimum of effort.

How to remove the chuck

To remove the chuck, you need to perform only a few manipulations. This is a fairly easy process. To begin with, you need to find a 10 mm hex key.

The wrench must be gripped firmly in the chuck with the shortest end.
• Now you can turn the screwdriver on for just long enough for the key to hit the table while turning.
• The chuck will turn on the internal thread by which it is secured to the shaft.

This is one of the most common methods. But there is another effective way that can be tried. The cams must be fully unclamped and look inside. In the case where a screw will be installed inside, this will be considered an additional attachment that will lead to the shaft. The screw must be unscrewed completely. Only turn it clockwise.

The hex should be clamped hard and try to turn it very sharply counterclockwise. As a result of these actions, the chuck should loosen. If this does not happen, you need to take a hammer and hit the key. Do it as carefully as possible so as not to damage the construction.

Additional measures

Sometimes there is a situation when none of the methods helped to solve the problem. Then you have to completely unscrew and disassemble the entire tool, and then remove the spindle with chuck and gearbox from the construction. All that remains should be well clamped in a vise, and then you can remove the chuck, using a wrench. It is worth noting that the clamping must be very careful: there is a risk of damaging the unit due to too much effort.

It is worth noting that in some models of screwdrivers there are grooves, with which you can simplify the task of removal. But this is rarely the case with modern tools.

The chuck can jam in the case if the tool has overheated a lot. That’s why you should periodically let the power tool have a rest. It is also worth taking care that the chuck does not start to “chatter. This can also be the cause of malfunctioning.

Choosing a new tool

If the old chuck can not be carefully dismantled and repaired, it must be replaced. You will have to choose a new one. It should be noted that different types of chucks can be installed in the design of screwdrivers. They can be key or keyless, as well as quick-clamping. The key product is different in that the clamping on it can be performed more qualitatively. Quick-clamp chucks are not inferior in this parameter, but they have to be replaced quite often, because the clamping mechanism very quickly comes into disrepair.

If you have to change tooling frequently during chuck removal, it is preferable to choose the quick-change version, because if you replace the old part with it, you can save time on this procedure. It is best to get a key chuck when using large-diameter tools.

There are chucks that are fixed inside the device using a cone. They are also made with a wrench or are quick-change chucks. The choice is always left entirely to the customer.

How to use a screwdriver

Electric screwdriver, such a very necessary tool in the kit of the home craftsman, has the same principle of operation for all brands that are produced nowadays.

If you take an electric battery, the difference between the cordless and corded tool is only in the type of power supply to the electric motor. The other parts and the wiring are the same.

When working, sometimes you have to do the tool repair or preventive maintenance. For this you need to disassemble the tool. This operation is particularly frequent with regard to the cartridge. In principle, the cartridge from all manufacturers is almost similar, except for a few points.

All parts and assemblies of an electric screwdriver in detail

In addition, chucks are divided into two types: jaw chucks and quick-action chucks.

If it is necessary to remove the cartridge, whether for repair or replacement, proceed as follows.

Prepare accessories for work, consisting of screwdriver, hex, matching the profile to the chuck, a small but solid object such as a weight, punch. It is necessary to wear safety glasses because the thrown away small objects can get into the eyes.

Before you begin, determine what kind of chuck it is: with Morse taper, with a simple thread and with a thread plus an additional securing screw.

Determine from the marking which type of chuck. The inscription “1. 6 V10” is Morse taper, if “1.0.11” for Russian tools and “2-13″ mm ½. 20 UNF” for imported tools where the size is stated in inches.

Foreign-made three-jaw chuck with metric thread

The tapered chuck can be removed very easily by simply tapping, gently with a hammer on the chuck housing. For the threaded one it is a little more complicated.

Removing the chuck: a Bosch electric screwdriver

Bosch brand screwdrivers are usually equipped with a fixing screw.

• We put the spanner in the cams and tighten it by a few clicks.
• The tool is placed on the edge of the table.
• You can remove the chuck retainer on the shaft by pushing on the stop button.
• The chuck can be removed counterclockwise.

All operations require special attention and consistency of disassembly/assembly.

Having received theoretical knowledge about the types of chucks, it will be easier to repair an electric screwdriver Interskol, Hitachi, as well as other manufacturers.

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Bosch and Interskol

How to unscrew a chuck on a Bosch electric screwdriver? The Bosch model differs from the Makita model in that it has an autolot. The element is replaced in the same way as in the previous case. clockwise.

Features of the disassembly of the Interskol electric screwdriver:

• To do this, it is necessary to insert a figure eight hexagon inside the chuck and lock it.
• Make sure the battery is fully charged and that the angle of the wrench is in the down position (parallel to the handle).
• Then select the drilling mode and reverse.
• Put a hard object (stone, small weight or dumbbell) under the hexagon socket wrench and start the engine.
• The chuck is unscrewed by twisting it intensively in an anticlockwise direction.

Electric screwdriver: briefly about the construction of its chuck

In order to be able to remove the chuck of an electric screwdriver you need to understand the construction of this assembly. This part is fastened to the shaft that drives it and also serves as its attachment point.

You do not yet have an electric screwdriver? Be sure to buy! And you choose it this way

Chucks are usually provided with a cylindrical shell. Under it are the clamping cams, as well as the adjusting sleeves. When they jam, it is almost impossible or very difficult to reach the workpiece. In this case it is necessary to remove the clamp, which facilitates further work on repairing or servicing the tool. This is done for the purpose of lubrication, cleaning, or routine inspections.

There are several ways to fasten a chuck. And in each case the problem has to be solved differently.

Chuck design

• Cam chucks, whose fixation is made with an L-key that is inserted perpendicularly;
• Quick-clamping, in which one of the housing cylinders is clamped by hand and the other is rotated around its axis in order to lock it in place.

Jaw chucks are less convenient, but the connection they provide is more secure. An adjusting sleeve that is turned with a wrench ensures that the steel cams are compressed until they are completely clamped.

Faults in an electric screwdriver can be found not only in the chuck. They can be eliminated in the following way

The tightening of the quick-release chucks is made faster by the. no wrench is needed for this.

Types of quick-action chucks

• the single-finger bit, into which the bit is inserted with only one hand, i.e.к. one of the elements of its body is automatically immobilized;
• double-coupling, both parts of which are movable. Therefore, both hands are needed when inserting the bit.

When replacing the chuck of an electric screwdriver, please note that single-cutting products are only used on tools with locking mechanisms.

Electric screwdriver: ways of fixing the chuck on its shaft

The following methods are used to clamp chucks:

• threaded chucks;
• with Morse taper, when the tapered shank is inserted into the spindle bore. This method is the most effective.

Additional connection strength is achieved by fitting a fixing screw.

Your electric screwdriver will become more functional if you have such attachments and devices.