The screwdriver chuck does not unwind. The screwdriver chuck is jammed, what should I do?

In our country, screwdrivers, as a household and industrial tool, appeared not so long ago. They were first used in the space industry, and then screwdrivers found application in ordinary human life.

Among the main parts of this equipment is a mechanism consisting of a hollow cylinder, an adjusting sleeve and clamping cams. This mechanism is called -.

disassembled cartridge

Types of cartridges

Today there are two main types of cartridges available for sale:

Quick-clamping
Cam

Keyless chucks have another classification:

Such cartridges are made from two types of material:

Metal;
Plastics;

Use of a plastic product – good opportunity reduce the weight of the equipment used, but this material is not reliable enough and is not resistant to shock loads. Keyless chucks can be used for both household and professional tasks.

Jaw chucks are more reliable, durable and can withstand greater shock loads, which is not unimportant for screwdrivers with an impact function.

How to secure the cartridge

There are several ways to attach the cartridge. Among them are:

Thread;
Morse taper;
Fixing screw as an addition to the above;

The role of the chuck in reliable fastening of the drill

Clamping drill chucks for household drills are available in three modifications:

key;
quick-release;
gear-crown.

The design of the jaw chuck can be understood with patience.

The body of the key jaw chuck is made in the form of a hollow hardened cylindrical sleeve (collet), on the outer surface of which a rotating adjusting collar is installed. On one side the cylinder is mounted on the drive shaft of the drill, and on the other side there are cams (petals) for attaching cutting tools (drills, taps, reamers, etc.). When the adjusting ring rotates, the steel cams move along guides using special threads. If they come close to each other, the drill is clamped. If they diverge from each other, the tool is released. The approaching and moving away of the cams depends on the direction of rotation of the holder. Reliable fixation of the drill is ensured by tightening the chuck holder with great force. To do this, use a special key or a quick-clamping coupling with quick-release chucks.

Drill with keyless chuck

The key helps to firmly clamp the drill and easily unscrew the adjusting collar. Drills of various diameters with a cylindrical shank are fixed in jaw chucks. The most common household cartridges electric drills designed for drills with a diameter from 0.8 to 10 mm or from 1.5 to 13 mm.

Why and when do you need to change?

The clamping device must ensure that holes are drilled with acceptable accuracy. But over time, the seats on the shaft and cams wear out, and the cartridge begins to beat. That is, the working area of the drill begins to move from side to side when rotating, and the hole is drilled with deviations both in location and in diameter. Wear on the cams does not allow the drills to be securely fastened, and they stop under load. There is only one way out - replace the worn cartridge with a new one.

How to replace a drill chuck with your own hands?

To attach the chuck to the drive shaft of the drill, a threaded connection or Morse taper is used. Visual inspection electric drill will not always help to suggest a method for securing the drill chuck. This can be indicated by the marking on the cartridge: it is stamped on its surface.

Replacing the conical type of part

The standard size of the Morse cone (according to GOST 9953–82) consists of 9 values: from B7 to B45. How higher figure after the letter B, the larger the diameter of the cone.

The marking on the cartridge indicates the type of fastening

Thus, having found the marking “B” on the surface of the cartridge, we can conclude that this is a device with a conical mounting base. With this method of attachment, the cartridge can be easily removed. It is enough to use a drift and a plumber's hammer.

Video: how to remove a chuck with a cone from an electric drill?

Replacing the reversible threaded chuck

To secure the drill clamp to an electric household drill using a threaded joint, two types of threads are used:

inch (for foreign models);
metric (from Russian manufacturers).

On an electric household drill, two types of threads are used using a threaded joint

The following marking is applied to the surface of the threaded clamping chuck body: 1.5–13 1/2 – 20UNF or 1.5–13 M12x1.25.

Reverse threaded chuck For fixation it has a screw with a left-hand thread. You need to know this nuance when filming broken cartridge. In order to get to the screw head, it is necessary to recess the cams into the collet completely. As soon as the head of the screw is visible, use a hardened Phillips screwdriver to unscrew it to the right clockwise. Then hold the hex key in your fists and hit it sharply in a counterclockwise direction. After the cartridge is torn from its place, it can be easily unscrewed.

Video: how to remove a chuck from a reverse drill or screwdriver?

On other models there are other options for mounting the cartridge on the thread. In some cases, the cartridge is twisted entirely from the threaded end of the shaft. In other cases, the screw can be fixed with a special thin key using a narrow groove. The main difficulty is to move the cartridge from its place when unscrewing. Sometimes this is very difficult to do. In any case, to remove the cartridge you need: a mechanic's tool, the necessary skill and patience.

Disassembling a drill chuck with a quick-release nut

To repair a tool, you must first disassemble it.

To clean the jaws and lubricate the moving parts and threads of the cartridge, it must be disassembled. Disassembly is necessary to repair and replace failed parts. Here is a short list and sequence of operations for disassembling the jaw chuck:

The removed cartridge with the conical part up, lined with wooden spacers, is clamped by the coupling in a vice.
Use a gas wrench to carefully unscrew the notched nut.
The bearing is pulled out. The puck comes out.
The cartridge is removed from the vice.
The adjusting sleeve is twisted from the base by hand. If it does not give in (jammed), then the cartridge turns over and is again compressed by the clutch in a vice. A little machine oil is poured onto the threaded part of the coupling and base. Then, using a gas wrench, the base is skillfully unscrewed from the coupling.
If there is a retaining ring or nut at the bottom, they are removed.
The cams are pulled out of the guide rings and removed from the base cone.
All parts of the drill chuck are carefully inspected. If worn, deformed or broken parts are identified, they are rejected and replaced.
The jaw chuck is assembled in the reverse order. At the same time, all moving parts are lubricated with a special grease. It is best to use the lubricant recommended by the manufacturer.

The procedure for disassembling cartridges of other models may be different. It depends on the type of chuck, its design and the manufacturer of the drill. To disassemble the drill chuck yourself, you need to fulfill three conditions:

have the necessary set of tools available;
have plumbing skills;
to be a person with a stable, balanced psyche.

Possible problems with the chuck when operating a drill: causes, descriptions and ways to solve them

To avoid problems with a drill, you need to be able to operate it correctly. A drill is a universal tool; it can be used to drill wood and metal, plastic and tile, stone and glass, concrete and brick. In everyday life, a rotary impact drill of medium power is usually used. It is equipped with a chuck of the SDS system, which was invented by BOSH. The SDS chuck is not particularly accurate, but is ideal for drilling concrete, stone, and brick. That is, those building materials, where drilling is necessary with impact.

For more precise drilling of metal and wooden parts, it has a special adapter for attaching a jaw key chuck or a keyless chuck. A drill cannot be used for milling work. Drill chuck It is not designed for side loads and will quickly fail. Of great importance is:

correct choice of drill;
correct sharpening of the cutting part of the drill;
mandatory marking of the center of the holes using a core.

You need to skillfully select the desired speed, feed, operating mode depending on the workpiece material. All these factors directly affect the reliable operation of the drill chuck.

The part falls off

Does the cartridge fly off? This problem occurs quite often even on new drills with a cone-shaped jaw chuck when drilling a deep hole. You need to lift the drill to free it from the chips, and at this moment the chuck flies off the cone. The situation can be corrected by increasing the tension in the cone joint. To do this, the chuck is heated in oil or oven to a temperature of 110 degrees and placed on a cold drill mandrel.

Clamping jaws jammed

Drill work always takes place in dirty conditions. This is dust, dirt, shavings, sawdust and other small debris. If this debris gets inside the chuck, it can cause jamming. threaded connections, in particular, at the cams. There is only one way out here. Requires disassembly of the cartridge, cleaning and rinsing of moving parts. Before assembly, all moving parts are lubricated with lithol. Especially a lot of waste is poured into the chuck when drilling ceiling surfaces. Here you can think about protecting the cartridge with half of a small rubber ball.

Runout

Chuck runout can be caused by various reasons. For example, the Morse seat cone is worn out. This can be checked using paint. An even layer is applied to the cone and the cartridge is inserted. Then the mark he left on the cone is removed and studied. Another reason could be uneven wear on the cams. In this case, they need to be changed. But more often they replace a broken cartridge with a new clamping device.

In the right hands, a household drill can work wonders. With its help, holes are drilled in durable and soft materials. The chuck is an important component of a drilling machine. It is this that ensures the reliability of drill fastening and drilling accuracy. Therefore, it is very important for a home craftsman to be able to independently carry out minor repairs and replacement of this part of the device.

Every active user tool encountered a situation where it jammed clamping mechanism screwdriver cartridge Interskol, Makita or any other brand. This structurally simple, but functionally significant unit is subject to serious dynamic, vibration and shock loads. Dust, metal shavings and other small mechanical fractions also penetrate into it - all these factors lead, if not to fatal breakdowns, then to periodic malfunctions of the mechanism.

Types of malfunction

Typical cases in which the chuck of a Metabo, DeWALT, etc. screwdriver jams:

when trying to use a drill of the maximum permissible size, the cams are moved to the maximum, after which it is impossible to bring them together with the application of standard forces;
It is not possible to remove a drill or bit clamped in the chuck - the cams do not move apart. Often, they are clamped unevenly, which impairs the fixation of the drill.

Less commonly, jamming of the jaws occurs during their free movement during compression or expansion - usually this is facilitated by particles of debris, scale, shavings, etc., trapped under the figured part of one of the cams.

Repair methods

Experts recommend, regardless of the reason why the screwdriver jams, what to do first: introduce universal lubricant such as WD-40 into the internal cavity of the chuck, including the surface of the jaws. After 10-15 minutes, use a rubber hammer (or a regular one, through a gasket) to tap the cartridge and jaws with moderate force.

If the bit is jammed in the chuck of a Bosch, Texas, Praktika, etc. screwdriver, then (after lubrication) the use of two adjustable wrenches effectively solves the problem. One clamps the base of the cartridge, the other carefully rotates its upper part. To avoid damage to the surface and the unit itself, soft but dense pads such as leather should be used.

If your efforts lead to nothing, specialists from the workshops of the Udachnaya Tekhnika Service company will be able to restore the functionality of the tool with minimal financial costs and extremely quickly.

How change the drill in the drill - proven methods!

What repair would be complete without a good drill or a set of drill bits! But the most reliable tool can jam during its operation. Don't rush to panic! We will teach you how change the drill It is not correct to diagnose other failures in the drill.

Drill design - what do you need to know about the tool?

Convenience and ease of implementation ensured the popularity of the cam mechanism. But it is not without its shortcomings. One of them is difficulties in working with small drills. A short product may simply fall inside. You can still secure it by placing the drill in a horizontal position, but you cannot put too much pressure on its surface while working. If another drill was inserted into the drill, there is an option to remove it by turning the adjusting ring in the appropriate direction. It is rarely possible to do this manually; for this purpose there is no special key that acts like a lever, increasing the force. When tightening a drill without a key, it is also not recommended - the larger the diameter of the drill, the more securely the fastening needs to be made.

The cartridge does not unscrew screwdriver? This may help you.

What do if a jammed drill is stuck in cartridge. How to remove a jammed drill?

Drill jammed in chuck

Kind of a life hack.

When purchasing fasteners, make sure that they are rubberized - this way you will be less likely to injure your hands when securing the tool.

The quick-release fastener, the second most popular, can be operated without a key. It is enough to insert the drill and turn the lever, this can often be done do with one hand. The drill fixation provided by this type of chuck is quite sufficient for most jobs, however, compared to classic version fastenings it is inferior in reliability, and it costs more. The main advantage of a quick-release fastener is the speed of drill replacement and the safety of the process, since such a chuck is devoid of teeth that can injure your hands. The absence of a specialized key is also a significant advantage! Experienced builders know how easily it gets lost, so very often you can see a key taped to a wire with tape or tape.

True, this does not add convenience, but there is at least some confidence that you won’t have to look for the key throughout the construction site. How to change the drill bit in a screwdriver? The scheme is absolutely identical - the chucks of most drills are similar to the fasteners on screwdrivers. Of course, the latter tool cannot be a full-fledged replacement for a high-quality drill, if only because the fasteners are not provided for drills with a large diameter, and the speed of a screwdriver is usually lower.

How to change a drill bit in a drill - we can do it ourselves!

It is not always possible to remove a drill from the chuck in the usual way - as a result of heavy load or improper fixation, it can jam the chuck. How to get a drill out of a drill without damaging the fastener and the tool itself? First of all, try to cool the cartridge thoroughly. Sometimes this is enough for the cams to release the drill a little and you can pull it out.

How to replace the chuck - updating the drill

Most often, the cartridge is the first to become unusable in a drill. Dismantling it at home is not easy, but it is possible! The fastener is screwed onto the spindle itself, but in addition it is also secured with a bolt with a left-hand thread. In order to get it, you need to completely open the cartridge - it is inside. The whole difficulty of unscrewing it lies in the fact that many do not know about the left-hand thread, and when trying to unscrew it, they twist it even more, tear off the cap and eventually take it to the service center.

By unscrewing the bolt, you can also unscrew the cartridge itself, although this is not so easy to do. Some models have recesses at the base of the thread for a wrench - in this case, you can fix the spindle and unscrew the fasteners using a lot of force. The real difficulty comes when there are no wrench cuts. You will have to remove the housing cover to secure the spindle inside the drill. Difficult, but doable.

Removing a cartridge is one thing. Finding a new one is a completely different matter. In addition to the methods for clamping the drill, which are described above, different cartridges also different carvings! The surest way not to confuse anything is to take an old cartridge with you and demonstrate it to the seller, or choose the right one based on the layout. When you have completed this task, all that remains for you is to screw the chuck onto the spindle and screw in the bolt, which in our case is screwed counterclockwise.

Screwdriver battery - How to charge correctly It’s impossible to imagine # in cases where these same teeth are missing, charging the battery for a screwdriver is a common process. Just insert the battery into the standard device and wait for the green LED to light up instead of the red one. Next, take out the battery, you can work. And there's a lot of noise in the works...

What is a screwdriver? Essentially, this is the same drill, but a screwdriver differs from it in that it has a lower rotation speed of the chuck and, at the same time, greater torque.

Another difference is that while on a drill the rotation speed can change smoothly, on a screwdriver, as a rule, “fixed” rotation speeds of the chuck are set. This is due to the “slip” function of the screwdriver chuck: when the screw is tightened, the chuck stops rotating, although the motor is still running. This function allows you not to tear off the splines and not “drive” the screw inside.

Different types of speeds are designed for specific types of work and materials, as well as the “drilling” mode. Just like a drill, a screwdriver has a reverse function. The design features of the screwdriver allow it to perform a wide range of jobs: tightening and unscrewing screws and self-tapping screws, screws and nuts, drilling soft materials.

Using a screwdriver, for example, in the production of plasterboard partitions or when assembling furniture, increases the speed of work significantly. Therefore, a screwdriver is rightfully considered one of the most common tools in any craftsman’s kit.

The designs of all screwdrivers are approximately the same. They are quite light and have a “pistol” handle, designed for working with the tool with one hand.

Youtube How to properly insert a bit into a screwdriver?

The start key is designed in such a way as to regulate the rotation speed by pressing force.

An important element of a screwdriver is its power source. If drills are produced in both mains-powered and autonomous (battery) versions, screwdrivers, due to the nature of their application, are almost exclusively battery-powered. The battery is the heaviest and most expensive part of the screwdriver.

Household models of screwdrivers are usually equipped with nickel-cadmium batteries (designated “Ni-Cd”), while more expensive professional models are equipped with lithium-ion (“Li-Ion”) batteries. Their difference is that nickel-cadmium ones have a shorter service life (about 1000 recharges), and also have one unpleasant feature: if the battery is not completely discharged, its capacity decreases during subsequent charging.

But whatever the battery, its capacity is limited by the weight of the tool. Therefore, even the most expensive models of screwdrivers can work continuously for no more than a few hours. Some manufacturers solve this problem by introducing a second spare battery into the screwdriver kit. However, this significantly increases the cost of the tool. The battery is charged from a regular network. The charging speed again depends on the model and can range from 2-3 to 6 hours, although some models of screwdrivers provide “fast” charging in 10-15 minutes.

Operating rules

Working with a screwdriver is easy. The jaws of the chuck hold the attachment required for the job (“bit”, or wrench, or drill), and by pressing the screwdriver with some force, pressing the button rotates the chuck. If it is necessary to unscrew a screw or pull out a drill, “reverse” is activated. When working, you should follow several rules:

Fully charge the screwdriver before using it. At the same time, strictly follow the instructions for charging time - “overexposing” the battery to charger shortens its service life.
When working, choose the “screwing” or “drilling” mode correctly - this way you will protect the motor and gearbox of the screwdriver from damage.
Please remember that the screwdriver is not designed for drilling into stone or concrete.
Try not to throw or drop the screwdriver - it is a rather fragile tool.
Keep the screwdriver clean - remember that fine dust and dirt particles act as an abrasive in the rubbing parts, and the screwdriver elements fail faster.
Now you're in general outline Do you have an idea of what a screwdriver is and how to work with a screwdriver? It's time to pick up the instrument and create!

03/23/2013 at 14:03

Cordless drill/driver

Cordless drill/driver Bosch PSR 18 Li-2.

A fairly simple screwdriver for home use, the main advantage of the device is a universal lithium battery, suitable for a jigsaw and delta grinder.

The weight of the screwdriver including the battery is 1.3 kg. That is, it is not heavy, but not light either. At the same time, the maximum torque is 46N*m, which is not bad at all.

The speed is regulated, as in most other screwdrivers and drills - with a button. Also standard, there is a chuck rotation direction switch located nearby.

The screwdriver has a standard quick-release three-jaw chuck. The maximum diameter of the drill shank that can be clamped into this chuck is 10mm.

The manufacturer does not recommend using this screwdriver for drilling large holes: in steel more than 10mm, in wood more than 35mm.

To secure a bit or drill in keyless chuck screwdriver, just fix the chuck with your hand and turn on the screwdriver at high speed.

How to use a screwdriver

And the chuck will clamp the drill itself.

To remove a drill or bit, you need to switch the screwdriver to reverse, lock the chuck and turn on the screwdriver: the cams will open and release the drill or bit.

The torque limiting clutch has become standard in screwdrivers. At the top of the case, opposite the cartridge, there is an arrow that indicates the number. How larger number, the greater the torque the clutch can withstand without disconnecting. In total, the clutch has 10 positions with different torque settings, plus a drill mode. In drill mode? which is marked “DRILL”, the torque limiting clutch is disengaged. And with the help of a screwdriver you can already drill.

This screwdriver has two speed ranges from 0 - 400 rpm and from 0 - 1340 rpm. The speed can be switched using the red slide switch at the top of the screwdriver, in the “backward” position, the screwdriver operates at the first - low speed. If the engine is moved forward, the second speed is activated. In addition, the speed number can be seen in the window next to the switch.

A convenient option for a beginner is the direction of rotation indicator: two triangles at the top of the device will help you determine in which mode the screwdriver is operating: a forward arrow means that the chuck rotates clockwise and screws the screw accordingly; if the backward arrow lights up, the chuck rotates counterclockwise and turns out the screw.

The screwdriver has an indicator showing the charge level of the battery.

And nearby there is a “POWERLIGHT” backlight lamp, which will be a great help when working in poorly lit places.

We drill a wooden block in the “drill” mode, i.e. with the clutch disconnected. For a relatively thin drill, you can turn on the second speed.

To drive a screw, you need to select a bit that is suitable for this type of screw.
The main types of splines, in the photo from left to right:

1) Philips,
2) positdrive,
3) straight,
4) star-shaped (torx),
5) hexagonal (hex).

In addition to the shape, the slots differ in size and for each slot size of a screw or screw, you need to take a bit of the right size.

So, the required bit is selected and clamped in the chuck, but to screw in the screw, you should turn on the first speed and set the clutch to limit the torque. In our case, for this diameter of screws we select position “17”.

The photo shows the result of screwing in a screw to different depths. When the screwdriver fully tightens the screw, the screwing force will increase and the torque limiting clutch will begin to operate. Thanks to this, the screw will not go deeper than necessary and will not split the block.

The lithium-ion batteries on which the battery is built are very good and you will not need to replace the batteries in the screwdriver for a long time.

BOSCH GSR 12 V screwdriver chuck clamp jammed

Forum / Tools and equipment / BOSCH GSR 12 V screwdriver chuck clamp jammed

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