When is it necessary to repair or replace the gear
The most common problem in which you have to replace the gear of an electric screwdriver (for example, the Interskol model) is the motor itself burned out. In this case, you need to purchase a new engine, which already has a gear. But, there is an important nuance. the problem is that on an electric motor, the factory gear may not fit the gearbox that is installed on the electric screwdriver itself. In this case, it is required either to look for an engine that matches the size of the gearbox, or to perform an operation to replace a small unit.
Another problem: the chuck starts to spin during operation. This only indicates a malfunction of the gearbox, or rather, the gear, which does not cling to the teeth. This leads to cartridge overshoot. Failure of this unit indicates that the motor is not turning the spindle.
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An experienced craftsman can understand that the unit in question is to be replaced if extraneous noises begin to appear in the gearbox during operation, and slippage or large jerks are observed during the spindle rotation.
Important! The gear begins to fail in most cases due to the fact that it is made of plastic. This option is often found on the cheapest screwdrivers (for example, “Metabo”).
The unit in question cannot be repaired even if it is made of metal, and therefore it must be replaced.
All operations that a master may think of to repair a gear will end in failure due to the small size of the unit and the impossibility of securely attaching the fallen teeth, and therefore it is not worth wasting time.
Important! After the direct replacement of the gear, it is necessary to apply a large amount of lubricant to it so that the operation of the equipment is as smooth as possible and the components do not wear out.
How to change a gear on an electric screwdriver motor
an electric screwdriver is a useful tool that is often used in construction work to speed up the process. Breakdowns on this type of device are not uncommon, and therefore you need to know how to fix them. One of the most common problems, which is also the most difficult to fix, is how to remove the gear from the motor of an electric screwdriver. The article will describe in detail how to do this with improvised means or using a special puller.
How to remove a gear from an electric screwdriver motor
To remove the gear from the motor of an electric screwdriver (or drill), you can use only two methods. The first requires a special puller. You can make it yourself, or try to find it on the Internet, for example, on the Aliexpress website.
The second option is not so reliable, since you will have to use improvised equipment that is not specifically designed for dismantling small parts.
Each of these methods has its own characteristics, which you need to know about before starting work.
Is it possible to independently replace the gear on the electric motor of an electric screwdriver
It is possible to fix this problem on your own, but the operation is rather complicated (due to a fragile assembly that must be removed from a thin shaft), and everything must be done very carefully, since there is a risk of breaking off the teeth. Then you have to buy a new gear.
You can independently remove the gear from the motor of an electric screwdriver (for example, the “Bosch” model) using a lighter and pliers, or a thin U-shaped piece of metal. But experts do not recommend using this option, since there is a risk of damaging the teeth.
With a puller
The problem when removing the gear from the motor is that it sits very deeply (near the engine itself), and therefore there is practically no way to slip the puller “jaws” into the necessary grooves for dismantling. This difficulty is observed on most models of screwdrivers and electric drills.
How to change the gear on the motor of an electric screwdriver. three methods:
- Try to grind off the “lips” of the puller to make them as thin as possible. The operation is risky, because with excessive grinding, the “jaws” can simply break off during the dismantling process. In addition, this puller will no longer be used to remove other nodes, since it simply will not withstand the load. Therefore, this method can only be used if the puller was purchased only to remove a specific gear.
- The second method is preferable if you need to remove a whole gear from an unnecessary engine (after work, it remains only to remove it or use it as a “donor” of spare parts). To carry out the operation, you must use a vise. The motor is placed in the clamp vertically. so as to crush the part that is near the gear shaft inside the engine. Of course, after the operation, the motor must simply be thrown away, since it will no longer be possible to use it. But there will be the necessary clearance and the ability to place a ready-made, fully functioning puller in its original position for dismantling.
- And the last method can be used in a situation where the master needs the motor itself, but he no longer needs the gear. In this situation, it is necessary to make notches on the gear teeth with an angle grinder so that there is a place for installing the “lips” of the puller. It is important to ensure that the motor is not damaged when working with an angle grinder, which can easily slip off the work surface. After the operation, the gear will only have to be thrown out.
Many craftsmen, with an unsuccessful attempt to remove some unit of the unit, try to knock on it with a hammer, in the hope that it will move from its place, and it will be possible to dismantle it further without much effort.
Important! It is categorically impossible to knock on the gear, since it rests against the impeller located inside the motor.
In this situation, the impeller will simply come out of its grooves, and it will be very problematic to put it back. However, even after the successful return of the impeller to its place, in the process of operation in the future it will constantly jump out of its grooves.
If there is no possibility or desire to buy a puller, then you can make it yourself with your own hands. In terms of time, production will take about an hour, and everything you need should be in the garage of any master.
- M5 tap for threading.
- Several files that are in good condition: square, flat and triangular. They must be small.
- Vise.
- Wrench nut for 27.
- Hexagon bolt with M5 thread.
- One side of the nut must be cut almost to the very edge.
- On the side, additionally cut a hole into which the gear shaft will be placed (made after measuring a specific shaft).
- From above, above the side that was cut down, drill a hole and cut the thread with an M5 tap. The corresponding screw will be placed there, with which the gear will be squeezed out of the motor housing.
The puller is not difficult to make for a person who has dealt with plumbing work.
Without puller
The operation can be performed without a special puller, but the risk of damaging the gear increases. The first step is to thoroughly heat the gear so that it expands and gets off the shaft better. To do this, you can use an ordinary lighter.
After heating, several removal methods are used (at the option of the operator):
- If the motor is not needed in the future, you can use a flathead screwdriver as a lever, and the motor will serve as a fulcrum. To dismantle, you need to gradually push the gear away from you.
- If the engine cannot be damaged, you will have to take a small and thin metal plate in the shape of the letter “P”. The edges of the plate should rest against the teeth. After heating, it is necessary to firmly but gently pull the plate.
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The information provided is enough to understand how to remove a gear from an electric screwdriver motor at home.
How to disassemble a chuck on an electric screwdriver: How to disassemble a keyless chuck of an electric screwdriver
Part structure
The standard shape chuck for a conventional electric screwdriver is made in the form of a metal cylinder with a cavity inside. It is equipped with a ring and an adjusting sleeve. Such an element of an electric screwdriver is mounted on a shaft.
With the help of such an element, a drill or a grinding attachment is mounted. Due to the presence of the thread, a reliable fixation of the part is ensured. The surface can be tapered. There are 2 options for such elements:
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- key. it uses a key to fix the bit;
- quick-clamping.
The key chuck for an electric screwdriver is more reliable. The drill “sits” more firmly on it. It is most often used when attaching heavy attachments to a part with a large diameter. The use of a quick-release device ensures maximum ease of replacement of such parts, even when using a grinding attachment. The keyless chuck features a high degree of safety during operation.
Since each device has its own advantages and disadvantages, there is no universal element today.
How to remove and disassemble an electric drill chuck
Even small, minor repairs will require proper disassembly of the structure. To date, there are only two mechanisms for fastening to the working shaft, so the process of dismantling work may vary.
With the threaded method, the fastening must be disassembled in the following order:
- deepen the cams inside the body and dilute them as much as possible;
- unscrew the fixing screw located in the central bottom of the device. Fasteners with a left-hand thread must be twisted clockwise;
- using an open-end wrench put on the shaft, the device is unscrewed.
In the absence of flats, the body is disassembled, as well as the subsequent fixation of the rotor shaft in a vice. It is advisable to unscrew the element with a gas wrench.
The most popular and commonly used in modern tooling is the taper connection. In addition to the exceptional strength of the tapered connection, this option, with the right approach, can be quite easily disconnected on its own. For this purpose, the body is first tapped off in a circle, after which the element is knocked off the shaft with a sharp and precise blow to the rear of the shaft.
After removing the cartridge, it is necessary to correctly determine the type of malfunction. It is possible to carry out repairs on your own in the absence of significant damage to the parts and jamming caused by metal chips that have got into the adjacent parts. As a rule, it is possible to restore operability with this type of breakdown by washing the elements in oil or kerosene using a soft medium-sized brush. After this cleaning method, the assembly is carried out in the reverse order.
Most often, owners of actively used tools are faced with a number of malfunctions caused by wear, as well as damage to threaded or toothed parts. Minor local damage of this type can be easily removed by grinding. For this purpose, it is recommended to use a file or a standard abrasive skin. In the most difficult cases of breakdowns, a complete replacement of the failed cartridge is most often required.
Take the damaged screw with your screwdriver
If the screw is locked or the head is too damaged to use the rubber band, and the screw comes out of its seat hard enough, the solution is to use a power screwdriver. This solution can be even easier and faster than the rubber band method because your electric screwdriver will do all the work.!
As with normal use of a screwdriver or drill, open the screwdriver chuck and insert the damaged screw head into it. The hand grips firmly to secure the chuck jaws to the screw head. Move the machine to the unscrew position (reverse position) and start without moving too quickly, because in this case the screw head can rotate in the chuck. Usually the screw should be quietly unscrewed.!
In the absence of a metal clamp (chuck / screw head), you can also use a rubber band trick to increase the friction between the chuck jaws and the screw head.
Not very well-known, there is a formidable screw extractor tool due to the ruthlessness! A bit like Captain Flam, we use this tool when there is no more hope
The principle of the screw extractor is simple but ingenious: as with the rubber band method, the principle is to “hang” the screw head as if it were in perfect condition, and then unscrew it all. The screws have an inverted thread allowing it to “screw” into the head as it is turned in the direction of the screw loosening. This tool is usually available in different sizes to fit different screw head sizes. Once you find the right size screwdriver, you can use it as a normal power screwdriver tool as shown below.
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Disassembling 3 Jaw Chuck Taig Lathe
Okay, you accidentally forgot which jaw went where with your 3-jaw chuck when you took it apart for cleaning, or perhaps you never cleaned it and it is clogged with shavings. Here are some images and text for help.
If you are smart, then you marked which jaw in which slot goes by writing on the cartridge and sponges with a Sharpie or a pencil.
If you are as stupid as me, you forgot to do this, cleaned all the chips and now you scratch your head.
Align the jaws side by side and examine the teeth. One jaw has a short section on the outer end and a long section on the inner side, one has a medium length at both ends, and the latter has a long section on the outer end and a small section on the inner side.
Now take the scroll (the other half of the chuck) and slide it onto the chuck body and gently rotate it when it touches the chuck jaw until it snaps into place. Be careful not to move your jaws accidentally out of the flushing state. You may have to wiggle and nudge this a little, but will eventually line up with the grooves and break.
Oh, did you forget to replace the cartridge? Better to disassemble it again and lubricate it with lithium grease. Think of it as practice.