How to remove the bearing from the punch anchor

How to Remove Bearing From Angle Grinder

Now many home craftsmen and professional craftsmen have a whole arsenal of power tools that help to cope with household and repair and construction tasks. Rotary hammers, jigsaws, angle grinders, drills. they all greatly simplify and speed up work. But it happens that the power tool breaks down. It makes no sense to rush and send it to the trash because of this. Due to intensive operation, the parts wear out, respectively, the equipment has no right to work in normal mode. If you know how to remove a bearing from the anchor of a power tool, there is an option to extend the life of your own “assistant”. Timely replacement and lubrication of parts allows you to operate the device for a longer time.

The main task of the power tool motor. it is rotation. The anchor is the fundamental part of the device that forces the working mechanism to turn. The service life of the part depends on the power and speed, and of course the activity of the equipment implementation. Bearings are needed to reduce the friction during the movement of parts. Specifically, they provide smooth rotation and refine the running mechanism of the power tool. If the bearings are looked at and lubricated in time, their service life will increase significantly.

DIY Angle Grinder Repair (Bearing Replacement)

Sometimes it is better to carry out tool prophylaxis on time than to get expensive repairs.

If, during disassembly of the electric motor, you notice traces of friction of parts, it means that the bearings have worn out. It is necessary to immediately remove the bearing from the armature and replace the spare parts. This will allow you to avoid negative consequences in the form of engine breakdown or complete failure of the tool.

How to remove a bearing without a puller from an electric motor shaft, generator armature, hammer drill and other power tools

When there are no special devices for dismantling and replacing an element, and the tool is urgently needed for work, you can use various devices that can be found even in the field. The equipment should be disassembled beforehand to avoid possible damage to other components, since the used tool may fall off.

If the part is completely worn out and must be disposed of, you can use wooden pads and a regular hammer, with which the part is gradually removed by uniform blows on the holder. If this method is not suitable, you can use two open-end wrenches as a lever as an impromptu puller. On both sides it is necessary to put small pieces of wood so as not to damage the case, and try to move the product with even efforts.

You can also use a vise, clamping the shaft with jaws with the obligatory shims. Even with heavy sticking, there is enough force to dismantle without damaging the main parts.

Professional advice

Some professional advice will help prevent angle grinder armature breakage and extend the life of your power tool. Preventing dust and dirt from getting inside the case:

• use a construction vacuum cleaner to remove dust when sawing non-metallic materials;
• spill water over the cut area, reducing dust emission;
• close the air intake grilles with gauze or a piece of nylon tights, periodically change / clean this insulation;
• adjust the gearbox so that the direction of rotation of the wheel is directed “away from you”. dust and other sawing products will be directed away from the air intake grilles;
• do not place the angle grinder on the ground, sand, dirt or wet surfaces.

Tips for working with an angle grinder:

• immerse the cutting disc into the material slowly, without pressure;
• assist in sawing by moving the angle grinder forward and backward;
• compare the cutting volume and material properties with the specifications and power of the angle grinder;
• if the speed can be adjusted, do not cut at low speed for too long.

For how to check the anchor angle grinder, see the next video.

To put or not when replacing?

The user most often determines the malfunction of the rotation support by ear when a third-party grinding sound appears. After disassembly, a bearing is found inside the flywheel, and information about its purpose, marking and dimensions is absent in the manual and on the forums.

• the consumable is discharged from the catalog, comes in 7-14 days, it is pressed out using folk methods and the bearing is replaced;
• the flywheel is removed, the rolling bearing is knocked out from the opposite side with a hammer, the user cannot find the bearing, partially restores the old one, stuffs it with grease and installs it in place;
• on the advice of colleagues, the flywheel is mounted without a bearing at your own peril and risk.

Experts recommend using the original part, installing it without fail if the car came off the conveyor in this configuration.

The main symptom of a bad bearing

The generator can fail for various reasons. If the bearings are to blame for the malfunction, then this is evidenced by the whistle under the hood.

As a rule, a worn bearing whistles. That is, it is not completely out of order, but it works half-heartedly, and its complete defect is expected soon. Charging may also not be lost, but there is a high risk of jamming the generator. Obviously, such bearings should be replaced.

Experts can easily determine the malfunction of the generator bearing by listening to the noise on the removed unit with a special device.

Soldering collector plates

The lamellas are installed on a plastic base. They can be erased to the very core. Only the edges remain, to which the brushes do not reach.

Such a collector can be restored by soldering.

• Cut the required number of lamellas from a copper pipe or plate to size.
• After stripping the armature from copper residues, solder with ordinary tin with soldering acid.
• When all the lamellas are soldered, sand and polish. If you don’t have a lathe, use a drill or screwdriver. Insert the armature shaft into the chuck. Sand with a file first. Then polish with zero sandpaper. Remember to clean the grooves between the lamellas and measure the resistance.
• There are lamellas that are not completely damaged. To restore them, it is necessary to conduct more thorough preparation. Slightly whip through the manifold to clean the plates.

Damaged manifold plate

We expand the place with a drill

Lamella preparation in the groove

If the collector has been completely worn out, then after soldering it will last no more than a month of active use. And not completely damaged plates after such a repair can withstand several brush replacements and are not soldered.

How to remove a bearing from an armature of a power tool: a few practical tips

Today, many DIYers and professional craftsmen have a whole arsenal of power tools that help them cope with domestic and repair and construction tasks. Rotary hammers, jigsaws, angle grinders, drills. all of them greatly simplify and speed up work. However, it happens that the power tool breaks down. Do not rush and send it to the trash because of this. In connection with intensive use, the parts wear out, respectively, the equipment cannot work in normal mode. If you know how to remove the bearing from the anchor of the power tool, you can extend the life of your “helper”. Timely replacement and lubrication of parts allows you to operate the device for a longer time.

The main task of the motor of the power tool. it is rotation. The anchor is that important part of the device that makes the working mechanism rotate. The service life of the part depends on the power and speed, as well as the activity of the equipment use. Bearings are needed to reduce friction while moving parts. They provide smooth rotation and improve the running mechanism of the power tool. If the bearings are monitored and lubricated in a timely manner, their service life increases several times.

How to remove a bearing from the armature in order to check its performance?

The condition of the bearing on the power tool motor must be given due attention. When it wears out above the permissible limit, overheating occurs, and the motor starts to run noisily. If the bearing is not removed from the anchor in time, then the stationary and moving parts will begin to touch each other when it is running when it rotates. And this, in turn, threatens with serious damage to the electric motor. This will require replacement of the rotor or armature. Checking the bearings is fairly straightforward. To do this, you need to place the motor on a solid surface, put your hand on top of it and rotate the shaft. The rotor must move freely and not jam. If you hear scratching sounds or feel uneven rotation, this will be the first call to the fact that it is necessary to remove the bearing from the anchor and troubleshoot.

Any bearing has backlash, that is, clearances. Their presence is quite acceptable, however, it is important that the indicators do not go beyond the permissible limits. It is necessary to check the backlash:

• radial, or longitudinal. To do this, put the engine on a hard surface and try to tilt the shaft in different directions with your hand. The amount of offset depends on the size of the part. For household power tools, deviations should be barely noticeable;
• axial. The check in this case is simpler. It is necessary to take the shaft with your hand and pull or push the rotor in the opposite direction. In household appliance motors, deviations should not exceed 3 mm. The closer this indicator is to zero, the better.

If during the disassembly of the electric motor you notice traces of friction of parts, it means that the bearings have worn out. It is necessary to immediately remove the bearing from the armature and replace the spare parts. This will avoid negative consequences in the form of engine breakdown or complete failure of the tool.

How to remove the bearing from the anchor angle grinder?

Today, home and professional craftsmen use several methods to solve this problem. If it becomes necessary to remove the bearing from the armature of an angle grinder or other tool, this can be done using the following devices:

• Strippers. These are special devices that allow you to easily and safely remove bearings of different sizes from the anchor of an angle grinder. The use of pullers practically does not require the use of physical force, even if the bearing is tightly seated. The centering mechanism ensures the simultaneous installation of the device’s grippers. It can be used in any position. Before removing the bearing, you need to clean the armature shaft of the angle grinder from old grease, chips, sand so that nothing interferes with removing the part. The centering mechanism allows the puller to position itself precisely. If the bearing is intact, and the dismantling process is carried out for inspection, it should be pulled out by the inner ring so as not to damage it. For large anchor shafts, an angle grinder use a massive puller with three or four gripping arms, and for small ones, devices with replaceable plates or straps are suitable.
• Hammers, chisels, wrenches and other tools at hand. In this case, in order to remove the bearing from the anchor of the angle grinder, it is heated with gas, squeezed in a vice, grinded, chopped and many other operations are performed. These methods, of course, can be effective, but there is a great risk that the seat of the part will be mechanically damaged. And often the bearing itself after such manipulations without a puller will be unsuitable for further use. In addition, the performer may be injured due to pieces of clip hitting the face, eyes or head, which fly apart after impacts.

As practice shows, pullers are more effective in this situation. They allow you to quickly, easily and without much risk remove the bearing from the armature of the power tool and inspect or replace parts. If you have to periodically carry out such operations, you should acquire such a useful device. The use of improvised devices is permissible only if you have experience in repairing power tools and an urgent replacement of a part is required.

Features of pressing the bearing onto the engine armature

After you have successfully removed the bearing from the anchor, it is necessary to carry out a number of necessary manipulations before assembling the equipment. If you are installing new parts, it is necessary that they match exactly in width, as well as inner and outer diameters, with the old bearings. It is important that no dirt or dust gets inside the product during installation, because this can lead to corrosion, chips and all kinds of damage. The bearing is mounted on the anchor using a metal pipe, which must first be lubricated. During the pressing process, it is important to ensure that there are no distortions. You should also observe the following nuances:

• lubricate the bearings with a special thick substance. It can be moisture resistant;
• only ½ (for equipment rotating up to 300 rpm) or 1/3 (for faster tools) of the bearing chamber is filled with grease. You should not put more substance, because all the excess will still be squeezed out during rotation.

Sometimes the process of fitting the bearing onto the armature is simplified if it is preheated in boiling oil. However, you need to be very careful in this case and make sure that the part does not heat up above 100 ° C.

Features of Asynchronous Grinder Motor

Almost all electrical appliances used at home use an induction motor. An important advantage of this type of motor is that it changes its rotational speed under load. This means that, for example, if you cut stone for a long time and do not stop at a household crusher, there will be no obvious external signs of engine overload. The speed of rotation of the disk will be constant, the sound is even. Only the temperature will change, but you may not notice this if you are wearing gloves.

Carelessness can be disadvantageous. Asynchronous motors are very sensitive to overheating, a significant excess of operating temperature causes the insulation to melt on the rotor windings. The engine will run intermittently at first, and then. when a short circuit occurs on the corner. the engine will come to a complete stop. It takes several times to overheat the angle grinder motor and the armature will most likely melt. In addition, the pins connecting the primary wires to the collector are soldered to high temperatures, resulting in a power outage.

Festool ts 55 ebq how to remove an armature bearing without a puller

small tricks in replacing the bearing with an angle grinder.

If, during disassembly of the electric motor, you notice traces of friction of parts, it means that the bearings have worn out. It is necessary to immediately remove the bearing from the armature and replace the spare parts. This will allow you to avoid negative consequences in the form of engine breakdown or complete failure of the tool.

How to remove a bearing from an anchor

How to remove a bearing from the armature in order to check its performance?

Proper attention must be paid to the condition of the bearing on the power tool engine. When it wears out above the permissible limit, overheating occurs, and the motor starts to run noisily. If it is just right to remove the bearing from the armature, then, when it is running, during rotation, the fixed, non-moving part will begin to touch together. This constitutes the next threat of severe damage to the electric motor. You will immediately need to replace the rotor or anchor. Checking the bearings is easy. For this purpose, you need to install the engine on a hard surface, put your hand on top of it, do not twist the shaft. The rotor must move freely and not jam. If you hear scratching sounds, in other words, you will feel uneven rotation, this will be the first hum for the fact that you need to remove the bearing from the anchor not to remove the malfunction.

Overview of the device from the inside

If the power supply is ok but the grinder is not working, you will need to open the case to access the motor. Disassembly is generally not difficult. But you should follow simple rules to help you avoid the hassle of re-assembly:

It is best to inspect the engine in bright light so that all small details are clearly visible. The armature should rotate freely around its axis, properly functioning bearings should not make a sound during operation. There should be no traces of molten wiring on the anchor, the windings of the chain should be intact, without breaks. You can smell the rotor. During the closing of the interruption, the insulating varnish burns and emits a constant specific odor. But such a diagnosis requires some experience.

How to Remove Bearing Angle Grinder Without Puller

How to remove a bearing from an armature of a power tool: a few practical tips

Now many home craftsmen, non-professional craftsmen, have a whole arsenal of power tools that help to cope with household non-repair and construction tasks. Rotary hammers, jigsaws, angle grinders, drills. they greatly simplify and do not speed up work. But it happens that the power tool burns out. You should not rush not to send it to the trash because of this. Due to intensive operation, the parts wear out, respectively, the equipment is not capable of operating in normal mode. If you know how to remove a bearing from the anchor of a power tool, it is natural to extend the life of your own “assistant”. Timely replacement of non-lubricating parts allows you to operate the device for a longer time.

The main task of the power tool motor. it is rotation. The anchor is the fundamental part of the device that forces the working mechanism to turn. The service life of the part depends on the power, not the speed, in addition to the activity of the equipment implementation. Bearings are needed to reduce the friction during the movement of parts. Specifically, they provide smooth rotation and do not enhance the running mechanism of the power tool. If you look at the bearings at the wrong time to lubricate, their service life increases significantly.

How to Remove Bearing From Angle Grinder Anchor