The button on the corner grinder broke down how to remove the disk. How to repair the Makita 9555 ,, 62TV ,,,

Corner grinder does not work button the gearbox lock

Corner grinding machine (angular grinder) belongs to the category of portable power tools. Autonomous launch system is capable of ensuring mobility and convenience in work. It is performed in the form of a button located on the corner of the corner grinder. In addition, the working tool of the Bulgarian wear out quickly and you should spend the minimum amount of time to replace it. The fixation button has such functions, which prevents the working spindle does not rotate when replacing the tool. The listed two types of buttons are installed in places of corner grinder, providing their maximum convenient use.

Electrical equipment device corner grind

Over several decades, the external parameters of the corner grinder have almost not changed, with the exception of improved models that use the battery as an element of power. The basis of the tool is a case with an integrated asynchronous engine and a gearbox, and a handle with a protective case is also screwed.

The power tool can be used with cutting and food disks, and there are also disks with sandpaper petals for grinding. Like all tools, a grinder may refuse to work, but most often it is not so difficult to eliminate the malfunction. To do this, you may need disassembly of the case and minor repair of parts. However, it is necessary to understand the device of a corner grinder, in the diagram of which there are the following elements:

The performance of all elements is very important for the normal functioning of the entire system. When failing of any part, a grinder becomes a useless tool. In order for the disk of corner grinder rotate, the anchor must rotate and set in motion, and the faster the anchor rotates, the greater the speed of the disk rotation. The collector is a peculiar part in the form of a platform to which the contacts of power and control electric departments lead. The collector takes the voltage from the brushes, and in the future process, the electrical energy turns into a mechanical.

The site polished by brushes can be seen when disassembling the case. Through the power cable, the current enters the brushes, which transmit the voltage to the collector. Most often, brushes make themselves felt with a glow, and depending on the glow, the degree of efficiency of brushes or anchor can be determined. No less important detail is the gearbox. The main task of the gearbox is to transmit movement from anchor to a working shaft on which a disk or other device is installed. The power of the power tool depends on the design of the gearbox, since this parameter is determined by the number of teeth of the main gear of the gearbox.

The stator is considered a very complex technical node. In the stature there is a winding that determines rotation of the rotor. When the winding fails, its rewinding is rarely carried out and may less often be crowned with success. With such malfunctions, you should not risk it. to eliminate problems, you need to contact experienced specialists.

Because of which the circle jams and why it is not possible to unscrew the disk?

Most often the malfunction is manifested in contact with the material. In the idle mode, such problems are not traced, since the number of revolutions of the tool remains stable. But, when we start grinding or cutting metal, then an increase in the number of revolutions begins, which is reflected in the operation of the disk and the angular grinding machine.

You can recognize the disk jamming by the following signs:

• At the circle of the tool, the number of revolutions is sharply reduced and braking, jamming can even be traced;
• The disk can succumb to deformation due to the even stronger clamping of the nut;
• Increase in the diameter and depth of cutting.

In this case, you need to react in time to the current situation and take measures. In this case, it is necessary to remove a clamped disk from a corner grinder, try to solve the problem with the lowest cost of time and effort.

One of the most common reasons for jamming the nut is that you have not used corner grinders for a long time, and a nut, bolt or puck dawns. Therefore, this causes a tool malfunction. If you are faced with such a situation, you need to perform a number of actions:

• First, turn off the angular grinding machine from power.
• Spray the anti.corrosion agent or special dissolving fluid to the structural parts of the corner grinder. The tool must be on the puck, nut, bolts.
• After that, you can proceed to the removal of the protective casing and individual parts that are promoted.

If special tools do not help to cope with the problem, then you need to move on to the second method. Its essence lies in the preliminary heating of wax, after which you can use the wrench to unscrew the nut. Control the effort so as not to break a grinding disk.

Sometimes the wheel cannot be unscrewed due to the wrong direction of unscrewing the nut. Make sure you unscrew in the right direction. If the nut is not unscrewed by a simple key, then you can make efforts with a hammer. But, in this case, it is important to carefully regulate the force so as not to damage the parts of the corner grind.

A method with which you can unscrew the nut and eliminate the problem largely depends on the type of grinding machine. The method of fixing the disk on the corner grinding also plays a role. Most often, in order to remove the disk from the corner grinder, you will need a wrench or screwdriver.

If you decide to independently remove the disk from the corner grinder or replace it, be sure to consider the security system. Grinding machines and their cutting parts are very sharp, so you need to be extremely neat and not forget about the means of protection. In addition to workwear, you will need protective glasses. If the wheel breaks, its particles can fly and fall into the face. If the wheel is stuck, and you can’t solve the problem, you will have to resort to more labor.intensive methods.

How to remove a grinding disk: important points

Without a tool, it is almost impossible to remove a grinding disk on a corner grinder. To remove the circle, you need to loosen a large number of screws, nuts, which is very difficult to manually do. Nuts, washers, screws are very tightened and are not amenable to manual promotion.

• Disconnect a grinding machine from the network;
• wait for a complete stop of the grinding disk;
• Use the wrench to turn the nut on the corner grinder counterclockwise;
• Remove the protective casing;
• Install a new wheel and tighten the nut.

When processing inappropriate material on the wrong grinding circle, you may encounter two potential risks. The disk may crack or break with the formation of a huge number of pieces of grinding circle. Pay attention to the compliance of the materials from which the discs are made, and the scope of their application:

• Aluminum oxide disc is designed for steel, carbide steel, iron. Alloy steel, high.speed steel and similar metals in composition;
• Carbide Carbide Disk works with brass, cast iron, bronze and other soft metals. It is also intended for processing stone and non.ferrous metals;
• Aluminum ceramic oxide is very abrasive and used for steel, solid metals. The main task of the disks. accurate grinding;
• Zirconium clay. Another type of grinding circle intended for steel and most solid metals.

Which way should sparks fly from corner grinder

Also a controversial issue that excites many. In fact, there are no common rules on this subject, and you can cut a corner grinder both from yourself and yourself. The only thing I want to say is that in the process of cutting the metal with a corner grinding from yourself, keeping the tool in the hands when jamming is very, very difficult.

Therefore, I cut only on myself, so that the sparks fly under my feet. There is nothing wrong with this, and does not happen, the pants do not burn, and the legs are still whole. But I completely control the tool, I hold it with my left hand by the side handle, and slowly press it as you saw out. At any moment I am ready to release the power button with my right hand, but if something is serious, then quickly take the corner grinder to the side.

By the way, when working with a corner grinder, many newcomers allow one gross as, in my opinion, a mistake. They press the disk so much to the disk that the angular grinder engine does not cope with the increased load. As a result, the winding of the anchor burns out, and the corner grinder has to be carried to the scrap, because it is easier to buy a new one than to change the engine in it.

How to remove a grinding disk: important points

Without a tool, it is almost impossible to remove a grinding disk on a corner grinder. To remove the circle, you need to loosen a large number of screws, nuts, which is very difficult to manually do. Nuts, washers, screws are very tightened and are not amenable to manual promotion.

• Disconnect a grinding machine from the network;
• wait for a complete stop of the grinding disk;
• Use the wrench to turn the nut on the corner grinder counterclockwise;
• Remove the protective casing;
• Install a new wheel and tighten the nut.

When processing inappropriate material on the wrong grinding circle, you may encounter two potential risks. the disk may crack or break with the formation of a huge number of pieces of grinding circle. Pay attention to the compliance of the materials from which the discs are made, and the scope of their application:

• Aluminum oxide disc is designed for steel, carbide steel, iron. Alloy steel, high.speed steel and similar metals in composition;
• Carbide Carbide Disk works with brass, cast iron, bronze and other soft metals. It is also intended for processing stone and non.ferrous metals;
• Aluminum ceramic oxide is very abrasive and used for steel, solid metals. The main task of the disks is accurate grinding;
• Zirconium clay is another type of grinding circle intended for steel and most solid metals.

How to eliminate the clip of disk on a corner grinder

To implement this method, you will need any massive wooden material: a piece of thick board, a segment of a beam or just a stump.

Then we take a corner grinder with a tightly clamped disk, turn on the tool and with sufficient effort we press the fixing nut to the surface of the stump so that it continuously rubbed against a wooden surface.

The process must continue for two to three minutes. This time is quite enough for the clamping nut to not only heat up, but hot. If the heating is not stopped on time, then there is a danger of damage to the spindle bearing due to overheating.

The degree of sufficiency of thermal effect on the fixing nut can be checked using a pipette with water: drops from it instantly evaporate, barely reaching its surface.

Next, we act in a standard way. Click on the disca button of the disc and unscrew the nut without any effort with a standard key. In this case, the known property of the metal helps us, expand when heating.

Destruction of the disk

Abrasive compressed by a nut, in the end, you can destroy. This will need:

First of all, a disk clamping in a corner grinder breaks with his hands. Then, narrow holes or pliers break off the remains of an abrasive sticking out from under the latch. Next, the clamped part of the disk should be removed. For this, a piece of metal is compressed in a vice. The turned on the tool is driven along the leaf edge between the nut. So the residues of the disk are removed, and after the clamp it should be easily unscrewed with your hands.

As you can see, in order to unscrew the ineffective link-fixer with a corner grinder, there are a lot of effective ways. When dismantling, it is only important to take into account caution and not damage the power tool.

How to remove a disk from a corner grinder key?

If a special key that is attached to the corner grinder is not lost, then it will be easier to cope with the task. Those who are interested in how to remove a disk from a corner grinder, experts advise first of all to fix a spindle. It is on it that the disk is located and is pressed using the flange. It is dismantled by an ore key. To make it technically possible, flanges are equipped with special holes into which the key pins are inserted.

To fix the spindle, you need to click on the button, which is located on the case on the back from the disk. During operation, the latch cannot be released with an open key, otherwise the spindle will continue to turn. If the disk in the corner grinding is spinning clockwise, turn the track key against the clock and vice versa and vice versa. It is important that the flange succumbs and moves off. Now it can be unscrewed completely and put aside. Then the old disk is removed and replaced by a new.

How to avoid replacing a disk on a corner grinder

Want to avoid expensive repairs? Then you need to initially take care of the safe and without problem operation of the device:

• Between the disk, the flange nut and the spindle head to lay a cardboard or plastic washer. Due to this, you will provide protection against jamming;
• correctly install an abrasive circle. the front side of the component is mounted on a support flange. In this case, it is necessary to avoid contact of the element with the nut. This method involves the use of a standard metal ring as a fuse;
• on the clamping flange to weld a nut. The latter will provide the possibility of pressing the consumable without using special tools. It will be enough to use a standard wrench.

In addition to the aforementioned recommendations, it is necessary to carefully monitor the tightening. When installing a disk on an angular grinder, you do not need to make too much effort. Otherwise, this in 100% of cases will provoke the seaming of the consumable and breakdown of an expensive angular grinder.

Method 2. how to remove a disk from an angular grinder key

A rather standard way. Involves the use of a special key that comes with a corner grinder. Initially, it is necessary to fix the spindle. The disk is installed on the latter, and the clamp occurs due to the flange nut (FG).

FG dismantling is carried out with an open key, for this flanges are equipped with holes. The latter includes the key pins and the removal is carried out.

The latter is located on the back. Then, with the help of an ore key (RK), a fixer is clamped. you can not let go, because the disk will rotate.

The disk rotates clockwise? Then the face key must be rotated against the sentry and vice versa, if the disk goes against. It is important to understand that the flange should succumb and move.

If this happens, then the component can be calmly unscrewed. After that, the old disc is easily dismantled and new.

When using such a tool, you need to take into account the fact that the tool is characterized by increased shoulder strength. Therefore, in the process of involvement, it has a powerful effect on the parts of the corner grinder.

This should be understood as the gas key can easily damage, disrupt the details or even “kill” the gearbox. Therefore, it is necessary to use the Civil Code extremely carefully.

Important: any manipulations over the corner grinder need to be done only after a complete disconnection of the tool from the network. If you do not take into account the large turns of the corner grinder, then the occurrence of injuries cannot be avoided.

You also need to take into account a large amount of waste. Working with corner grinder involves the presence of a significant number of metal chips and dust.

Therefore, as mentioned above, first of all, it is necessary to take care of personal protective equipment (PPE). glasses or helmet. Otherwise, emergency accidents cannot be avoided.

PPE provides not only safety. In glasses or helmet, you can pay much more attention to work with a corner grinder. This is certainly increasing the quality of the result.

Also, optimized use will enhance the efficiency of corner grinder. Due to this, you can more advisably spend materials such as abrasive circles.

It is worth remembering that the disk in the corner grinder is installed in several ways. The installation of “on itself” is notable for the fact that in the process of biting the disk jumps forward. Therefore, this type of installation is safer, unlike the method of installation “from yourself”.

Tip: for work without clamps, long metal blanks should not be cut to the end. It is enough to leave only 2 mm metal. It can be easily broken off and at the same time protect yourself from jamming of the corner grinder.

It is more effective to process small blanks directly if they are pressed with a vise or clamp to the workbench. Pressing density directly affects the quality of cutting and safety.

How to remove a snapped disk from a corner grinder

The use of new nuts solves the problem of disk removal, but what to do with the already snack disk? Even if the disk was installed correctly, it does not always work out to remove it. Practice tells different solutions to the problem. You can clamp the latch and hit through the extension on the holes of the nut in the direction of unwinding. This option is possible only with a good fixer. But the fixer may not withstand such a solution to the problem and break.

The second method is more logical. Under the clamping nut and the lower support washer, there is a gearbox shaft with set chamfers. The lower support washer is put on them. The standard wrench cannot be installed there. it is very narrow. But you can take a regular face key on “17” and grind it on both sides.

The shotted key will be included in the gap, set on the chamfers of the shaft and fix it. Now, by any key, any nut will be unscrewed, and the disk or its residues are removed from the corner grinder.

How to remove it?

Disks, especially designed for cutting, quickly “burn” and have to be changed.

It will be useful to recall once again about the need to disable the “corner grinder” from the network. Work is with rapidly rotating details and it is better to protect yourself.

If you need to replace the worked disk, you need to perform a number of simple operations.

• The disk is fixed on the spindle of the rod with a nut with a thread. In a set of any angle grinding machine there is a special key, on the horns of which the pins are fixed, which cling to the openings of the flange.
• The spindle is fixed with a special button, whose chloride when pressing enters the gearbox hole, thus fixing it. By pressing the button with your right hand, at the same time with your left hand you need to unscrew the nut nut with a key. If the nut has moved, unscrewed it with a hand. Everything, now the disk can be removed.

There are times when for some reason the key was not at hand. What to do? The easiest way out is to stop working. But, this, as they say, is not our method. Unscrewing the clipping nut of the “corner grinding” without a key is also possible. Often for this use a tubular (gas) key. On such a vein there is a device that disperses it. You need to squeeze the nut and, fixing the gearbox of the “corner grinding” button, move it from the place. Then it can be unscrewed with a hand.

• There are holes in the nut for its fixation with pins on the gangs of the key, you can unscrew it by tapping with a hammer on a tough or a bush that was stolen in a hole.
• It is sometimes possible to build a nut with a simple tapping along its edge with a hammer in the direction of twisting. However, in this case, damage to the flange may occur, first of all, holes for the key pins, in the future, apply the key to such a nut to be impossible.
• A very good result is obtained when using a nail. The nail is better to choose a large one, from 100 mm. With the help of a hammer and pliers, a vehicle is given by a nail form. Knife or chisel cut off the tip and a nail hat. With such an impromptu key, you can try to build a nut. You can bend the ends of such a key, then it will turn into a kind of an ore key, but this will require large labor costs. You can also in an arc formed by a bent nail, insert a gate, for example, a hammer or other nail.

Problem: Stop button broke

This node fails quite often. Both the button and the metal rod can break off. The worst option when the gearbox body is destroyed during a breakdown.

The main reasons for the failure of the Stop.Stop button are the following.

• Wear of the button and metal rod. Typically, the connection is made in the form of a cone on the rod, after dressing the button on which it is fixed. Surveys of surfaces do not allow the button to maintain the presence on the corner grinder.
• When the Stop.Stop button is pressed during the rotation of the angular grinder shaft, the metal rod instantly fails. Such a defect occurs mainly due to the inexperience of working with a power tool or other factors.
• The working tool happens jamming in the processed part. The energy of rotation is spent in this case to tighten the clamping nut and great efforts are required to weaken it. The created load when unscrewing should be so large that the stopper does not withstand and breaks.

In addition to the rod and the buttons, less often, but sometimes they are building a spring (lost during disassembly) and a stuffing box that protects the hit of abrasive particles into the gearbox.

Is it possible to do without it

The latch is located in the front of the housing corner grinder Hammer USM 850A. Photo 220 volts

Stop button. a convenient attribute of a corner grinder to remove and replace a working tool. She will serve for a long time by faith and truth if you follow some recommendations.

• Insert a working tool correctly. For example, the cut.out circle should be placed by the other side to the clamping washer, which is made of the working material of the circle. The side with the metal ring of the circle should adjoin the base surface of the corner grinder. The metal clamping nut will not grasp the material from which the circle is made, with the metal ring, the grabbing is much stronger (more theory for competent installation of discs below in the video).
• Jamming will greatly decrease when using paper or cardboard gaskets for a squeeze puck. Usually cardboard is supplied with an angular grinder. When destroying stocks, there is an option to use gaskets made of thin kapron. In the case of jamming in order to maintain the integrity of the stop button, it is easy to melt it with a soldering lamp and the clamping washer is easily unscrewed.

If, nevertheless, an accident occurred and the stop button on the corner grinding machine has broken, there are ways to remove the working tool without it.

• On the working shaft of the corner grinder behind the basic puck, there are worn surfaces of the shaft to fix the puck. Access to them due to a narrow gap is limited. If you hide the sponges of the wrench (usually the size 17) can be reached to flat shaft surfaces and fix it from turning. In some cases, it is recommended to remove the shaft and increase the width of turnkey planes so as not to spoil the key with ginging the sponges.

Corner grinder Metabo W 750-125 with a black stop button. Photo 220 volts

• In a locksmith workshop, you can use the vice. To do this, a worn or broken circle breaks a flush to the surfaces of clamping washers. So access appears to the gearbox bolts. They are easily unscrewed, the gear is extracted from the gearbox and clamped in a vice with soft sponges. In this position, the clamping washer is unscrewed by standard locksmith tools.
• Use a thin steel sheet (the thickness should be slightly smaller than that of a working tool). The remains of the working tool are removed to the maximum possible. The sheet is clamped in the device and about its rib using the angular grinding of on the remaining material is removed. Thus, the load on the clamping nut is weakened and it is freely unscrewed.
• The clamping washer can be heated, for example, with a gas burner or a soldering lamp. In heated state, it becomes more supple in the process of unscrewing. However, a strong heating of the entire mechanism negatively affects the lubrication of the gear of the gearbox. it is strongly liquefied and loses its properties.
• A method of unscrewing the nut with blows with a sharp object or brown of the inferator, configured for detection mode in the hole under the key pin, looks less aesthetically pleasing, but allows you to achieve the desired result.

There are quite a lot of other ways that are not given here, because craftsmen work with bells, whose work does not know the boundaries.

A simple way to unscrew the nut of the corner grinder corner grind

To unscrew the nut, first of all, it is necessary to break the remains of a broken detachment disk under the root.

You can do this very simply with pliers. Do not forget about protective equipment: glasses and gloves, as various small fragments flies.

This is a very simple and very fast way. In addition, the corner grinder is safe for bearings, since if the nut is not unscrewed. Most people take a hammer in the hand and begin to try to unscrew the nut with tapping.

What to do so that this does not happen anymore?

In order not to get into this situation anymore, you can put a plastic, paper or cardboard puck under the nut before clamping a new disk. And in this case, the nut can always be unscrewed without problems.

Cutting stones or discs now do not always manage to find the proper quality and therefore their fault becomes a frequent problem. Of course, the human factor of improper operation is not excluded. But now, if you are in a similar story. You know what to do. Until new meetings!