The screwdriver works but does not twist the chuck

Electrical failures

When the device is plugged into the network, but when the start button is pressed, the engine does not respond or starts to malfunction, overheating or strange extraneous sounds. the perforator may malfunction in its power unit:

  • a humming sound is heard, but the rotor axis does not rotate;
  • crackling and sparks are observed on graphite brushes;
  • the body heats up or melts, and you smell burning from the inside;
  • does not turn on;
  • when the tool is rotating, corrosive fumes and black smoke are emitted from the engine.

In order to repair the power unit, the master requires careful observance of safety precautions. Before removing the casing and starting the disassembly of the propulsion unit, the perforator must be completely de-energized and check if there is any residual stress on it.

How to check the start button and brushes

Further, the master unscrews the fasteners of the case, removes it and starts servicing the inside of the device.

The first thing that is checked is the button for starting the rotation of the tool. The button is separated from the power supply wires and tested with a multimeter.

If the plastic from which the button is made is not melted, then the starting mechanism and the speed controller installed in it are working properly. Otherwise, the node is replaced with a new one.

The next step is to remove, check and clean, and, if necessary, replace the brushes of the power unit.

The brushes are removed by picking them up with thin tongs or a screwdriver. Based on the design features of the engine, the brush channels are equipped with special plugs. They are pulled out, the springs and retaining screws are squeezed out. The brushes can now be removed without the need to disassemble the moving part. The brushes and the channels in which they are extended are cleaned. When installing them in their original position, it is important not to confuse left and right. If the graphite structure of one of the brushes is damaged, it is replaced with a new one, suitable in size and cross-sectional configuration.

As a rule, modern models include 2-3 suitable brushes for replacing worn-out.

Everything a home craftsman needs to know about punch repair

A universal hammering tool with a percussion-rotary mechanism, also known as a hammer drill, is used by construction crews, electricians and repairmen. They also use it in the home workshop.

Like other electrical appliances, the hammer drill sometimes breaks. Take it to the service and leave a certain amount there, or take advice and repair the tool yourself. everyone decides for himself. If the decision to repair the puncher at home is made, first you should study the features of its device and the advice of the masters for diagnostics and repair.

  • Instrument device and its mechanism
  • Troubleshooting
  • Mechanical failures
  • Electrical failures
  • Disassembly and assembly procedure
  • Removing the cartridge
  • How to remove the mode switch
  • How to check the start button and brushes
  • How to disassemble an electric motor
  • How to disassemble and check other elements
  • Possible malfunctions
  • Does not hammer. reasons
  • Does not spin or drill
  • The drill does not hold in the cartridge and flies out
  • Brushes sparkle
  • The instrument gets very hot
  • Does not hold a cartridge
  • Replacement of main components
  • Bearings
  • Start button
  • Brushes
  • Cartridge
  • How to repair a barrel instrument?
  • Daily care and storage

Brushes sparkle

When the brushes sparkle, the first thing to do is to clean the dust off the tool. If the effect of sparks does not stop, the device is disassembled and the integrity of the brushes themselves is checked. If necessary, replace one or both brushes to avoid short circuits.

Does not hold a cartridge

If the raster sleeve stops holding the chuck while the hammer is in operation, the cause is most likely in the retaining ring. It can open or become unusable due to intense load. it is replaced with pliers and a screwdriver.

Possible malfunctions

The following are the main signs that indicate malfunctions of the perforator units and how to fix them with your own hands.

The drill does not hold in the cartridge and flies out

In this case, the malfunction should be looked for in the chuck collet mechanism. it is disassembled and checked in place whether the ball bearings are in place, the retaining ring or the retaining spring has not opened or is loose.

Runout of the screwdriver chuck

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

screwdriver, works, does, chuck

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.

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.

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Faulty battery or screwdriver cable

Everyone understands that regardless of the “steepness” of the perforator without an energy source, its operation is impossible. Therefore, first of all, you need to check the serviceability of the battery if you have a mobile puncher 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 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 to the battery or the 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

Why the screwdriver does not work

Repair or installation of furniture is in full swing, and the screwdriver has stopped working. Let’s consider the main causes of breakdowns and how to repair a screwdriver with our 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, we 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.

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.

Start and reverse buttons, located side by side

Switching is carried out by changing the polarity on the terminals by moving the reverse button. Repair of 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.

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”.

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 with high quality if you treat it carefully, without showing “fanaticism” during its operation.

How to remove and change the cartridge

For the sake of safety of the work carried out, keeping 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. During intensive work, the cams can be pressed against the replacement part with great effort 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.

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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 screwed, 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.

Can it be repaired

The possibility of restoring a failed unit depends on the specific design. In some models, repairs are provided by the manufacturer. Others are conditionally maintainable, that is, they can be carefully disassembled and assembled, but the question is whether there is a spare part that has failed. There are also monolithic cartridges that are poorly or not at all amenable to recovery.

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

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What to do if the screwdriver scrolls

When buying a screw gun of domestic or imported production, we hope for its reliability and durability. At the same time, we do not think much about the fact that the reliability and durability of any equipment depends on its correct operation and prevention.

With prolonged use and constant loads, most likely you will surely encounter malfunctions in the operation of the device, for example, with the fact that the screwdriver cartridge will start to scroll.

This problem can occur regardless of the age of the machine. In such cases, do not panic and start looking for the nearest service center. If the screwdriver is scrolling, you should consider the possible reasons for this phenomenon.

Causes of breakage of the screwdriver

  • The gearbox is not lubricated enough, in which case it will be enough to disassemble and lubricate the latter.
  • The gearbox shaft may be bent.
  • The satellite or the pin to which it is attached is damaged or broken.
  • Wear of bearings and gearbox shaft.

When diagnosing a device breakdown, it is important to learn how to identify the symptoms of a malfunction. Such signs can be:

  • extraneous sounds emitted by the instrument during operation;
  • vibration and breakage of the chuck;
  • constant jamming of the screwdriver during operation.
  • when the motor is turned on, the device works by idling rotating the cartridge, but it can be easily stopped by hand even during the transition to the second speed.
  • If the screwdriver scrolls under load (this can be either a symptom of a breakdown or the breakage itself).

The reason for such breakdowns can be hidden in the clutch, gearbox or speed switch. With long-term trouble-free operation, the screwdriver rotates under load, a possible cause may be the curvature of the reduction shaft. In this case, the manifestation of strong beating and vibration of the instrument is inevitable. Perhaps one of the most common reasons for the breakdown of power tools in this group can be wear of the bearing shaft support sleeve.

If the screwdriver cracks and scrolls at the switch position, this also indicates problems in the operation of the gearbox.

Troubleshooting methods

  • If one bushing or bearing is damaged, you can limit yourself to replacing only the damaged parts.
  • Replacing the carrier or gearbox.
  • Replacing gears or repairing the latter.

Free up a Keyless Chuck

Repair stages

  • Remove the motor and carefully disconnect the motor from the gearbox.
  • Disassemble the gearbox itself (it is better to sketch or photograph their location).
  • Dismantle the clutch with worn teeth.
  • We make direct repair of the damaged part using a bench vise (the removed sleeve should be firmly fixed) drills and drills of the required diameter. You will also need a few screws and wire cutters for repairs.

The repair process itself will take a little of your time and maximum attention. In order to restore the worn out teeth of the retaining sleeve, you just need to drill several holes in place of the erased teeth in the retaining sleeve and screw the required number of screws into these holes. After that, you should remove the protruding parts of the screws with the help of nippers and test the power of the screwdriver.

With prolonged use and constant loads, most likely you will surely encounter malfunctions in the operation of the device, for example, with the fact that the screwdriver cartridge will start to scroll.

This problem can occur regardless of the age of the machine. In such cases, do not panic and start looking for the nearest service center. If the screwdriver scrolls, you should consider the possible reasons for this.

Causes of breakage of the screwdriver

  • The gearbox is not lubricated enough, in which case it will be enough to disassemble and lubricate the latter.
  • The gearbox shaft may be bent.
  • The satellite or the pin to which it is attached is damaged or broken.
  • Wear of bearings and gearbox shaft.

When diagnosing a device breakdown, it is important to learn how to identify the symptoms of a malfunction. Such signs can be:

  • extraneous sounds made by the instrument during operation;
  • vibration and breakage of the chuck;
  • constant jamming of the screwdriver during operation.
  • when the motor is turned on, the device works by idling rotating the cartridge, but it can be easily stopped by hand even during the transition to the second speed.
  • If the screwdriver scrolls under load (this can be either a symptom of a breakdown or the breakage itself).

The reason for such breakdowns can be hidden in the clutch, gearbox or speed switch. With long-term trouble-free operation, the screwdriver rotates under load, a possible cause may be the curvature of the reduction shaft. In this case, the manifestation of strong beating and vibration of the instrument is inevitable. Perhaps one of the most common reasons for the breakdown of power tools in this group can be wear of the bearing shaft support sleeve.

If the screwdriver cracks and scrolls at the switch position, this also indicates problems in the operation of the gearbox.

Troubleshooting methods

  • If one bushing or bearing is damaged, you can limit yourself to replacing only the damaged parts.
  • Replacing the carrier or gearbox.
  • Replacing gears or repairing the latter.

Repair stages

  • Remove the motor and carefully disconnect the motor from the gearbox.
  • Disassemble the gearbox itself (it is better to sketch or photograph their location).
  • Dismantle the clutch with worn teeth.
  • We make direct repair of the damaged part using a bench vise (the removed sleeve should be firmly fixed) drills and drills of the required diameter. You will also need a few screws and wire cutters for repairs.
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The repair process itself will take a little of your time and maximum attention. In order to restore the worn-out teeth of the retaining sleeve, you just need to drill several holes in place of the erased teeth in the retaining sleeve and screw the required number of screws into these holes. After that, you should remove the protruding parts of the screws with the help of nippers and test the power of the screwdriver.

At the beginning, you need to decide what and how is scrolled in a screwdriver.

If, when screwing in the self-tapping screw, it did not go to the required depth and at the same time the ratchet (the correct name is the clutch regulating the torque) of the screwdriver (scrolls), then the very clutch must be set to a different position (mode).

That is, to increase the effort and depth of screwing screws, screws into the surface.

The chuck will not spin with low effort.

If the screwdriver is scrolled in your hands (it also happens, especially if your hands are greased), you can wear gloves.

Possible and other reasons for scrolling, for example, the screwdriver gearbox is not lubricated, it must be lubricated, having previously disassembled.

There may be a problem in the gearbox shaft, or the bearings are heavily worn.

In this case, it is better to replace both the shaft and bearings with new ones.

Perhaps the screwdriver chuck does not grip the bit well, under the load the bit remains in place, and the chuck scrolls.

In this case, it is better to completely replace the cartridge with a new one.

ZUBR DA-14.4-2-Li KNM2

Compact and lightweight drill / driver with 45 Nm torque, which allows you to drill wood with drills up to 25 mm. The spindle is locked, which allows you to manually tighten the fasteners. Thanks to the impulse charging, it is easy to carry with you. Due to the new lithium-ion technology, productivity is increased by 35%. A keyless chuck is used to change drills.

  • Comfortable grooved handle.
  • Good power.
  • Infinitely variable speed control.
  • Holds charge for a long time.
  • There is a rubber smell.
  • There is no battery level indicator on the screwdriver body.

Hitachi DS18DVF3

Cordless screwdriver from the renowned manufacturer Hitachi, which deserves your attention. Thanks to the cassette-type nickel-cadmium battery, the battery is quickly charged, in just half an hour. There are two bit holes above the power supply. 22-point force adjustment, making it ideal for working with wood, plastic, mild steel and aluminum.

Two-speed gearbox with one-touch control button allows you to select the required number of revolutions. Turns in the first gear up to 400, and in the second 1200 rpm. The tool weighs 2 kg and is well balanced in the hand. Long life air-cooled motor.

The 13 mm chuck makes it easy to change bits. There is a branded hook for wearing on the belt, which has five positions. The kit includes: universal charger, 18 V battery, double-sided bit, branded flashlight, bit set with holder.

  • Fast charging and long lasting.
  • Robust case.
  • There is a hook for hanging.
  • Rich equipment.
  • “Memory effect” (the battery must be completely discharged before charging).

BOSCH GSB 180-LI 1.5Ah x2 Case

The device has three operating modes: screwing, drilling, hammer drilling for masonry. Two speed positions: the first is for drilling, and the second is for screwing in self-tapping screws.

The screwdriver is equipped with a backlight that does not consume much energy and is needed to illuminate the working area. Turns are regulated by pulling the trigger. An important feature of this model is the ability to replace carbon brushes, which extends the life of the motor. The device is enclosed in a compact suitcase weighing 1 kg.

  • Excellent torque (54 Nm).
  • Replaceable carbon brushes.
  • Batteries charge quickly and hold a charge for a long time.
  • Metal gears.
  • No bit holder.
  • There is no charge indicator.

Rating of cordless screwdrivers 2020-2021: the best models in terms of reliability and price. Which to choose?

Interskol DA-12ER-02 Home master

The most inexpensive cordless screwdriver in our ranking. Equipped with linear torque limiting clutch. The gears of the reducer are metal. Thanks to its low weight of 0.96 kg, even with continuous work, the hands do not get tired.

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The charging board is built directly into the battery itself, which allows it to be disassembled and replaced in the event of a breakdown. A window with indicator lights will remind you when it’s time to put the tool on charge. The warranty period is two years.

  • Thanks to the light weight, the hands do not get tired even during prolonged work.
  • Self-tightening chuck.
  • Battery indicator.
  • Low price.
  • The speed switch often sticks, which can damage the gearbox.

Makita DF331DWYE

This model has a plastic case with a rubberized rear handle. The device uses a cartridge from the German company Rohm, a world leader in this field, and all the main electronic elements for Makita are manufactured by a Dutch company. 18 steps of torque plus one for drilling. Thanks to the straight angle of inclination, you do not have to strain and bend your hand too much.

With the help of the regulator, you can accurately, without breaking the slots, tighten any screws and drill neat holes of such depth, which is necessary. This is especially important when working with furniture, where an extra millimeter can ruin the entire structure. The power is easily adjusted by the release button, the harder the press, the higher the power. Indicators on the charger will inform you when the battery is fully charged or overheated.

  • Belt clip.
  • Spindle speed.
  • Comfortable handle.
  • Long battery life.
  • A charged battery cannot be installed directly into a drill, you need to wait until it cools down.

comparison table

Model Maximum torque, N m Chuck diameter, mm Max. idle speed, rpm Battery capacity, Ah Weight, kg Average price, rub.
Interskol DA-12ER-02 Home master 28 0.8. 10 1400 1.5 0.96 3400
Bort BAB-18Ux2Li-FDK 33 0.8. 10 1350 1.2 5000
Hammer ACD185Li 31 ten 1250 2.6 6500
Makita DF331DWYE thirty 1. 10 1700 1.1 6800
Hitachi DS18DVF3 45 thirteen 1200 1.4 2 8500
BLACKDECKER BDCHD18KB 40 ten 1400 1.5 1.6 7000
ZUBR DA-14.4-2-Li KNM2 45 0.8. 10 1350 1.1 6300
Metabo PowerMaxx BS 2014 Basic 2.0Ah x2 Case 34 1. 10 1400 2 0.8 6000
DeWALT DCD710C2 24 1. 10 1500 1.3 1.1 7300
BOSCH GSB 180-LI 1.5Ah x2 Case 54 thirteen 1700 1.5 1.6 8900

TOP 11 best cordless screwdrivers of choice of buyers

  • KRÜGER;
  • Interskol;
  • Bort;
  • Hammer;
  • Makita;
  • Hitachi;
  • BLACKDECKER;
  • BISON;
  • Metabo;
  • DeWALT;
  • BOSCH.