How To Disassemble A Makita Screwdriver

How to disassemble a screwdriver battery?

So, the first step is to take the battery and place it on a hard surface. Personally, a kitchen table came up to me, besides, you can do something in parallel with disassembling the battery. Somewhere “grind off” delicious.

Batteries on screwdrivers are collapsible, but they are NOT collapsible. It is clear that it is more profitable for the manufacturer to make NOT collapsible, since the failure of the battery automatically implies the purchase of a new battery, only there is one small “НННООО”!

The thing is that the price of a new rechargeable battery for Shurik reaches up to a third of the cost of the screwdriver itself! Therefore, I, like a true Patriot of our country and a handshake 80. Go level did not even have a thought about buying a new battery or what. Any shitty Chinese counterpart (sorry for my French).

An immediate decision was made. I will disassemble the screwdriver battery with my own hands.

How to correctly and quickly disassemble the battery of a Makita screwdriver

Greetings, my dear readers.

I hasten to share with you two interesting news, which have NOT so sickly changed my way of life that has developed over the years:

1.On December 16, 2015 my son was born. Yaroslav :))) Now I have it. Honey, a daughter and two sons. 2. Shortly before the birth of his son, a terrible thing happened. The battery on the Makita screwdriver “died”, which has been plowed with faith and truth for almost five years 🙁

Of course, the first event is much more important for me, but I will introduce you to it in the next article of my blog 🙂

But the news that the battery of the screwdriver came to an end NOT sickly so undermined my already shaken health, since the “departed” was immediately buried and there was a certain amount of AL-KOgol for the repose of his 14. Voltaic soul. Yes, Megavolt will be with him.

Of course, all the years of your construction and repair career are yours truly “shook a huge number of screwdrivers, but Makita was a real godsend for me. Its ergomics, its reliability. I was captivated by him at first sight!

In general, I could not come to terms with the loss and decided by all means to repair the screwdriver battery.

He read a huge variety of literature, graduating with honors from the “novice warlock” courses. Department of applied necromancy, that is, the revival of the dead. I got to work, but from the first steps I realized that in order to restore the screwdriver battery, it was necessary to disassemble it.

How to disassemble the battery of a screwdriver yourself?

We take the battery and begin to carefully cut with an ordinary, but very sharp knife at the junction in the battery.

How To Disassemble A Makita Screwdriver

Then, in order to tear off the layer of glue located lower, I scrolled along the entire length with a self-tapping screw. This must be done carefully, because the body may crack and then you will have to get a haircut as a monk 🙂

When you feel that the battery begins to “crackle”, you need to start tapping the joint with a flat screwdriver

So, my dear hands, I independently disassembled the battery of the Makita screwdriver. Of course, my method is not a panacea, but I know for sure that it works 🙂

Dismantling the battery of the Makita screwdriver.

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Charge batteries

Before disassembling the blocks, be sure to charge them well. With subsequent voltage measurements, this is what will allow the concepts of which batteries are “live” and which comments. Before charging the batteries, it is recommended to clean the internal contacts of the charger with emery paper, because any contact resistance can “give out” an incorrect charging process.

When you charge both batteries alternately, pay attention to how fast they charge. If the battery is charged quickly, and the charge indicator signals the end of the process after just a few minutes, this means that there are definitely faulty cells in the battery. And of course, when the battery charges too slowly, or does NOT take current at all, it should definitely be disassembled and “tested” all the batteries that are inside. Read more about the charging time of the screwdriver battery

After you charge and disassemble your battery pack, you will see that there are several elements inside it. Cans. The number may vary, depending on the voltage level of your instrument. Banks are connected in a certain series. Inside there is a thermal sensor brought out to the contact plates.

We disassemble the battery with a spatula or a stationery knife

For those who are NOT used to working with a mallet and want the battery disassembly process to look quieter and more gentle, you can suggest using a small metal spatula or a utility knife. The main thing is that they do not have sharp edges, like a large screwdriver, which can easily damage plastic.

First, you should completely walk with a knife around the perimeter of the entire block in order to loosen the seam, and only after that you can begin to “pick” the flexible plastic with a small screwdriver. The method is no less painstaking than the first, and if the person is not experienced enough, damage may remain on the plastic case. However, if you work as carefully as possible, it is possible to do without “losses” in this case.

We measure the voltage

Before measuring the voltage of the cells, Prepare a simple pencil, with which you will write down the value of U issued by each battery in a bundle. Since in most cases the “running” screwdrivers are equipped with nickel-cadmium batteries packed in dense cardboard layers, it is important to ensure that the batteries are accessible from both sides.

Now it remains to turn on the voltmeter (or multimeter) and start measuring. When measuring, we make each battery an exposure for five seconds and see if the voltage drops (usually, it is normally about 1.2 volts in each battery separately). Using a pencil, we fix the indicators. It is impossible to keep the probes on batteries for a long time, because the resistance increases, and they can simply burn out.

Practice shows that if only one element of the entire bundle fails, this negatively affects the operation of all batteries. If the voltage indicator on any “bank” is 1 volt or less. She has already exhausted her resource. In order to finally make sure of this, you should check the self-discharge level of each battery in the bundle.

After the unusable elements are “calculated”, disconnecting them from the rest with a scalpel, and in their place we put batteries from the spare battery. So we redo the whole block, we collect one full-fledged from two.

We solder banks

Soldering should be done by spot welding using a regular aspirin tablet. It is impossible to solder one element directly to the second: any heating causes the evaporation of the electrolyte and a rise in temperature, which can be critical for the battery.

When disassembling a bundle and soldering, it is important NOT to lose metal particles, which may be indispensable when soldering elements together. To be on the safe side, you can take care of how to make blanks of spare plates from bending metal in advance. It is important to remember the following: the better I solder, the better the battery will work.

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Aspirin gives off a lot of corrosive fumes, so work in a well-ventilated area. A soft fusible composition with flowing properties is taken as a solder. The solder is sprinkled with aspirin powder, so it flows between the plates and connects them securely, and aspirin helps fix the composition in the right place.

The assembled battery is installed in the case, and the operation of the screwdriver is checked. If the tool is running, the newly assembled battery is charged as usual and its functionality is checked again. If there is no drop in revolutions in the instrument, this means that the experiment was successful. Since nickel-cadmium batteries work for a long time with proper operation, there is a chance that a new bundle assembled by your own hands will NOT let you down, and a self-made screwdriver battery will work properly.

How to disassemble and remake a battery from a screwdriver with your own hands

Everyone knows that the battery of a screwdriver sooner or later begins to lose its former performance and needs to be replaced. Usually only a couple of elements in a common bundle “sit down”, but this negatively affects the entire battery. Therefore, it becomes necessary to either replace several elements with new ones, or still change the battery pack completely. As a complete set of any screwdriver. “Hitachi”, “Makita” and other models. Two batteries are included, if you wish, you can try to assemble a whole homemade battery from two. The owners of power tools, who use them constantly, sooner or later begin to wonder how to remake the battery of a screwdriver into a cast one. As for the newcomers who were first puzzled by this goal, they first of all have a question about how to disassemble the battery from the Makita screwdriver or any other, so as not to damage the fragile plastic box.

Experienced electronics enthusiasts assemble different types of batteries, including power supplies for an uninterruptible power supply (UPS). This is much more difficult than disassembling an electric drill battery. Any drill is often produced with the so-called “non-separable” battery packs, which are either firmly sealed with tape around the perimeter, or their two parts fit so tightly to each other that, at first glance, it is impossible to disconnect them without causing forced external damage. However, among the craftsmen you can also meet people who have already thoroughly “got their hands on” on such batteries and can happily share secrets with everyone.

How to disassemble a battery using an ordinary Kiev woman

In order to disassemble a battery from a Bosch screwdriver, Metabo or any other tool of 12 volts or more, you need to make some effort. If you just rip open the edges of the battery pack adjoining each other with a screwdriver, it will be messy. In addition, there is a greater risk that the fragile plastic structure will simply break.

Therefore, it is recommended to take a woman from Kiev and begin to slowly tap on the edge of the seam until characteristic sounds appear, which means that the seam itself begins to weaken slowly. It will take a long time to knock, and it will take time and patience. But it is in this way that you can ensure that the disassembly of the battery from the Makita screwdriver will be crowned with success, without unnecessary breakdowns and losses.

After a while, you will hear a crack of a breaking seam. The batteries themselves inside from such manipulations will NOT be damaged. Only the seam that holds the block will break, and the “cans” and the two halves of the plastic case will remain intact.

When we disassemble the block, we should knock on the body with a mallet lightly, and not make any special efforts, so that it bounces slightly off the surface. From time to time between tapping, you can try to slowly pull back the bottom cover of the unit, thereby checking how much the seam has loosened. In such cases, the Kiev woman herself will be slightly damaged, but there is nothing wrong with that.

It should be warned right away that the battery packs of the 12-volt Makita screwdriver are often extremely sturdy and difficult to disassemble. But if you slowly work with a mallet, the seam on the glue will gradually crumble. This may take ten minutes or more in time. But for a person with experience, the whole process Takes NO more than six minutes.

That is how, gradually and accurately, you can disassemble that screwdriver battery, which the manufacturer intentionally made “non-removable”. In order not to change the batteries in it, but immediately run after a new one, which is expensive. Of course, this will require a certain skill and accuracy. But it will allow you to save money, and at the same time learn how to disassemble the battery from the Makita screwdriver with your own hands.

How to disassemble a screwdriver in general

Let’s analyze the disassembly, an example is a Makita screwdriver:

  • We remove the block housing where the battery is located.
  • Removing the screws that join the two halves of the case using a Phillips screwdriver.
  • We take out everything that is contained inside the tool body.
  • Detaching the reverse button.
  • Dismantle the speed switch.
  • Disconnecting the motor and gearbox.

How a screwdriver works?

What problems can be fixed at home? How to recognize this or that breakdown? To give specific answers to the questions asked, let’s first understand the internal mechanism of the tool. The main protruding element is the power button. It is used to start the device and to change the speed, direction of rotation of the working part. Patron.

Adjustment of revolutions is carried out thanks to an electronic device based on a transistor. The speed of rotation is directly proportional to the force at which the button is pressed. The reverse is started by replacing the polarity of the electric current on the terminals. Traditionally, the screwdriver is equipped with single-phase collector-type motors, which operate from a continuous current. The motor includes a housing, magnets, anchor and brushes.

Rotation from the motor goes to the gearbox. Further, it converts high engine speed into reduced cycles on the shaft, a cartridge with active bits is fixed in it. The gearbox can be used classical, as on a conventional drill, including planetary. Recently, the classic reducer is almost never used, so we will NOT stop and move on. The planetary gear includes:

  • Ring gear
  • Sun gear mounted directly on the motor shaft
  • Satellites
  • Two or three carriers

Then comes the force stabilizer, which has sixteen positions. These positions give a specific voltage to the screw, so as not to spoil the material with which they are attached. The last part. Cartridge.

How to disassemble a screwdriver: cartridge, battery

Innovative technologies in construction are developing every day, it is no longer a secret that a screwdriver. An irreplaceable assistant for both an experienced specialist and a novice master. Thanks to him, you can easily tighten all kinds of screws and self-tapping screws when assembling furniture structures, as well as when repairing equipment and living quarters.

  • How to remove a chuck from a screwdriver
  • How to revive a screwdriver battery
  • Repair of the gearbox and screwdriver button
  • How to change the chuck for a drill

So any equipment eventually fails for a long time already not news to us, so it becomes possible to disassemble the screwdriver and try to fix it with your own hands. But only without fanaticism, be careful when disassembling, especially such models as: Interskol DA 12ER 01 Interskol DA 18ER.

How the cartridge is disassembled

If the fixation of the cartridge is conical, then it can be removed simply. By gently hitting the block body with a hammer. If the fastener is threaded, the following steps are required:

  • In the temporary direction, unscrew the screw with a left-hand thread.
  • We squeeze the hexagon in a vice, put the key on it and hit it with a hammer. Likewise, the chuck should move from its original position. You can choose another option:
  • Place the screwdriver on a flat surface such as a table.
  • Turn it on.
  • Observe if the cartridge has moved off the table. When hitting a hexagon.
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It also happens that all of the above methods do not work, and then one thing remains. Disassemble the screwdriver, then:

  • Remove the gearbox and spindle;
  • Place the assembly in the vise clamps;
  • Take the pipe wrench and then detach the chuck.

And if debris is found in the gearbox, then you need to do so.

How to disassemble the battery

  • Detach the screws at the bottom of the box.
  • Open box.
  • Check and reject components.
  • Replace and reassemble.

The mounting screws on the underside can vary from four to six. Often unscrewed with a Phillips screwdriver. The screws come in various lengths. This must be taken into account in order not to confuse them during assembly. On some modifications, you can find a non-separable case. Then Examine the entire surface and find a special strip along which the factory gluing passes. Next, you need to take a strong knife and insert it into the groove, slightly shaking to the sides. If the body breaks into the top and bottom. The autopsy was successful. Not a problem if it happens past the groove. All discrepancies can be glued with good superglue. Upper case contains several parts for the battery. The voltage is measured at each of these components, which must certainly be in the range of the optimal level. If the difference is more than 10%, such a battery needs to be replaced.

Each manufacturer strives to create a tool that will be as convenient as possible in the workflow, creating an extensive range of models. From basic screwdrivers to professional samples.

Hitachi screwdrivers prioritize excellent build quality as well as the practicality of their tools. Model shoes of cordless screwdrivers from Bosch are practically no different from their brothers, which have a cord for connecting to 220 V. Equipped with mode switches, as well as a shutdown button and accelerator options, Bosch screwdrivers. An excellent solution for home and professional use. In addition, such brands as Interskol, Makita, Cmi, Zubr have proven themselves well.

Soldering new cans

Immediately after freeing the frame and the board from the old batteries, new ones can be connected to them. Before soldering, it is recommended to properly clean the surfaces on the cans and on the board itself from the remnants of past soldering. This will allow you to achieve better contact for a long time.

Now all new cans from other devices are placed in their respective locations on the frame and are soldered to the power controller one by one. It is recommended to do this with a thick soldering iron nozzle, since a lot of solder will be needed. The contact must be very reliable and have a large contact area.

After sequential assembly, it is recommended to wrap the entire structure in special paper and place it back into the case. Then the battery is reassembled and closed with a cover that is fastened with screws.

Before implementation, the battery must be recharged at a special station to its full capacity, and only then only connect it to a screwdriver for testing. If done correctly, the battery will become functional again.

Replacement banks can be taken out of second batteries or purchased separately. The cost for them is quite decent, but still manual replacement will cost much less than buying a new battery.

Screwing in bolts instead of teeth

After all the gears are removed from the gearbox, the inside of the device will open up. Given the specifics of the problem, most likely the master will see that all the plastic teeth on the inside have been ground off. This happens during long-term use of the device, or in case of gross violation of the rules of use. The plastic teeth are soft enough that they simply grind under the influence of temperature and constant mechanical stress. This leads to the fact that the main gear has nothing to catch and it starts to scroll.

To repair and restore functionality, it is necessary to restore the teeth. In this case, there is no need to restore all the teeth, but it is enough to install two iron.

To accomplish what you want, you need a drill, small bolts and a drill. It is advisable to use diamond-coated drills, since it will allow you to effectively grind off the excess part of the bolt for a short time.

Work order:

  • At the location of the plastic tooth, a hole is drilled in the side wall of the gearbox. Use a drill bit slightly smaller than the diameter of the bolt. So it will be possible to screw it in with effort and ensure reliable fastening.
  • Two holes must be drilled diagonally to ensure a secure hold of the gearbox and stable tool operation. Thus, the load will be distributed over two teeth.
  • During drilling, it is advisable to direct the drill bit downward so that then the bolt does NOT stick out upward. Otherwise, it will take much longer to process it with a drill.
  • Now you need to forcefully screw the bolts into the holes obtained.

Makita screwdriver device

The Makita screwdriver is a fairly simple design, which consists of several main parts:

  • Battery;
  • Engine;
  • Reducer;
  • Mode switch.

Additional devices may be added on some models, but the main components remain unchanged.

The inside of the Makita screwdriver is pretty simple. Here are the places where the battery is connected, the wires go to the speed switch, as well as the start button itself, from which the contacts go to the engine. The engine is frontally inserted into a gearbox consisting of a whole set of gears of different configurations. The composition of the set depends on the number of speeds or operating modes of the screwdriver. Modes are switched using a special controller, which is brought out.

In a gearbox, gears with external teeth work in close connection with the housing itself, in which the teeth are located from the inside. And if in some parts the teeth are made of metal, then the plastic body itself includes plastic teeth. It is not surprising that such a structure wears out and fails over time.

Dismantling a Makita screwdriver device and battery repair

Operation of a Makita screwdriver inevitably leads to wear of some parts of the mechanism. And to continue to use the tool effectively, you will need to carry out some repair work. The procedure for disassembling and repairing such equipment is presented below.

How to repair a Makita screwdriver

One of the most common problems with a Makita screwdriver is first speed problems. At the same time, everything functions perfectly at second speed. This problem is associated with a malfunction of the tool reducer, which does not allow effective use of the first speed. Consider how to get rid of this problem and repair the screwdriver.

Using a drill

The bolts are processed with a drill from the sides and, if necessary, shortened in length. It is necessary to give the bolts the shape of a real tooth and provide for the installation of the crown without interference.

Important! It is not recommended to overheat the bolt while working with the drill. Otherwise, it may become very hot and melt the surrounding plastic. The gear housing will deform, leading to more serious problems. So you need to take breaks while working. To let the bolt cool down.

Once the teeth are ready, the gear ring can be reinserted. If done correctly, it will insert without any interference. Two teeth are usually enough to restore the gearbox to work, so screwing in more bolts is NOT logical.

Screwdriver button repair. Instruction and diagram

Screwdriver. A mobile tool for easy handling of fasteners and screw connections.

Until recently, cordless screwdrivers could only be found in the arsenal of professionals, but with the advent of inexpensive household models on the wide sale, their popularity has increased dramatically.

Unlike an expensive professional tool, budget counterparts have a smaller resource, which is why they often fail.

One of the weakest points of a household screwdriver. Start button and reverse switch. As practice shows, it is they who break most often.

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Over time, the tool stops responding to any manipulation at all. Often there is a problem of the opposite nature, when the motor starts to work spontaneously.

In SEPARATE cases, to eliminate the defect, it is enough to disassemble the tool and clean it, although more often a complete replacement of the screwdriver button is required. In both the first and second cases, you can fix the problem yourself. Everything in order.

Device and diagram of the screwdriver button

Screwdriver button. The main control element, which performs several functions at once:

  • Turn on / turn on the instrument;
  • Switching the direction of rotation;
  • Smooth engine start;
  • Speed ​​control.

However, each of the controls built into the button block cannot work correctly by itself. With the exception of the direction of rotation switch, which is more often a separate function block.

In most cases, the body consists of three conventional compartments, in which working units and mechanisms are located.

  • In the lower part of the body there is a control unit for switching on / off and adjusting the speed of the electric motor.
  • In the middle part is the “trigger” of the smooth start (the deeper it strangles, the higher the rotation speed of the cartridge). The button, when pressed, slides in a special block along the guides, a variable resistor responds to the speed control.
  • In the upper part there is a reverse button. Chuck rotation direction switch. The direction is reversed by changing the polarity of the voltage applied to the switch.

This is approximately how all control units of screwdrivers of different brands are arranged. To familiarize yourself with the device of a button of a specific tool model in more detail, we recommend that you study the diagram of a screwdriver button (It is in the instructions).

How to repair a screwdriver button if it doesn’t work. detailed instructions

To diagnose and repair a screwdriver, you will need the following tools:

  • Crosshead screwdriver;
  • Flat blade screwdriver.

As a result of active use of any power tool, dirt will inevitably accumulate inside its body.

Diagnostic steps:

  • We disassemble the tool body. To do this, disconnecting the battery, unscrew all the screws (they can be hidden behind decorative overlays, which will have to be removed).
  • We check the health of the electric motor. To do this, disconnect the two power wires from the control unit and connect them to the battery contacts (the engine should start working).
  • We disassemble the screwdriver button. To do this, squeeze the plastic latches and Separate the two parts of the button housing.
  • We make a visual inspection of the state of the button for dirt and damage.
  • Next, you need to carefully assemble the screwdriver button, install it in place and test.


If cleaning the control unit did not work, it is necessary to replace the entire button unit.

For this you need:

  • Disassemble the screwdriver (the process is described above);
  • Install the new button in place of the old one;
  • Connect the motor to the button terminals (polarity is optional in this case)
  • Assemble the screwdriver by carefully placing the wires in the case.

It is very important to choose a button for a specific model of a screwdriver, since with all the external similarity and visual coordination, the part may not fit into the grooves. Typically, new buttons are sold complete with battery terminals and transistor.

Description, general information

Makita screwdrivers are very powerful. The average stroke rate for various models is about 2300 rpm, which is a good indicator in comparison with other brands. The weight of most models of tools lies within 1.5 kg. Its small mass means that it will be comfortable to work with such a tool. The manufacturer also took care of the convenience of working in poorly lit rooms, making LED backlighting for most models. Separately, it is worth highlighting the type of handle for holding THESE tools on the weight. As a rule, they are made of rubberized, and therefore it is convenient to hold them in a brush, respectively, the work process is much easier.

The disadvantage of THESE screwdrivers is the strong vibration of the handle during operation, as well as their short-lived batteries. In addition, the price for the products of this company is quite high, which is important for the domestic consumer.

Repair of the charger of the Makita screwdriver

When repairing the charger, it is necessary to unscrew the screws securing the housing covers. Inside there is a printed circuit board with contacts. First you need to check the transformer with a tester. To do this, you need to measure the output voltage. Then you should ring the cable to exclude its fracture. Then the primary and secondary windings of the transformer and the fuse are checked. You need to collect it in the reverse order.

Dismantling the Makita screwdriver

To disassemble the screwdriver, you need a Phillips screwdriver and some personal time. To disassemble the screwdriver completely, you need:

  • Unscrew the screws securing the case;
  • Remove the composite start button mechanism;
  • Remove the electric motor together with the gearbox;
  • Disconnect the gearbox from the engine by unscrewing the bolts holding them.

To disassemble the battery of a screwdriver, you need to loosen the bolts connecting the body, or separate the body joints on an adhesive basis using a soldering iron. Inside the battery there are several nickel-cadmium batteries with a certain capacity and carrying a charge. In case of battery repair, they need to be replaced with new ones.

The chuck is changed with a screwdriver and a hex wrench. First, use a screwdriver to loosen the fixing screw in the chuck by turning it clockwise. Then the hexagon is inserted, the reverse button is turned on, clamped, and then the chuck easily yields.

Brushes for the Makita screwdriver

The brushes used for the screwdriver are graphite-based. Their cost today varies within 2-5 c. E. They are located in the motor housing and are two graphite cubes fixed to metal plates. With intensive work, they wear out and wear out.

When repairing with your own hands, you can file them out of brushes from a second tool, for example, a car starter. After grooving, they should be inserted into the brush holder and put in place by assembling the motor.

Repair of the gearbox of the Makita screwdriver (diagram)

To remove the gearbox, you need to disassemble the case by unscrewing the screws with a Phillips screwdriver. We take out the start button, the reverse switch button, disconnecting the bolts securing the engine to the gearbox. Then you need to take out the contents of the gearbox (various gears), the speed selector washer. When examining an empty gearbox, special attention should be paid to the teeth located around the circumference of the gearbox housing. If they are worn out, the gearbox will NOT be able to perform its function: the speed switch will not work correctly. To restore the teeth, it is necessary to use small bolts, inserted them in place of the original plastic ones. The gearbox must be assembled in the reverse order. The gearbox diagram is shown in the figure below. It shows a general diagram of the gearbox.

Scheme 1

The diagram shows:

  • Shift lever
  • Body assembly
  • Nameplate
  • Screw
  • Spring
  • Reverse shift lever
  • Start button
  • Contact terminal
  • Screw
  • Keyless chuck
  • Gearbox assembly
  • Electric motor
  • Screw
  • Body assembly
  • Charging unit
  • Battery

A modern screwdriver is a high-tech device. Important structural elements:

  • Removable battery
  • Rubberized handle handle
  • Powerful electric motor
  • Metal planetary gearbox
  • Soft start button
  • Reverse switch button
  • Torque regulator

These are the main components of the screwdriver design, which are included in the basic package of any screwdriver model.