Do-it-yourself grinder repair bearing replacement

In detail: do-it-yourself grinder repair bearing replacement from a real master for the site my.housecope.com.

In modern finishing works, various construction tools are used. Grinding machines are no exception.

The device of the grinding machine.

Due to frequent use, any tool can fail. And in order to repair the grinder with your own hands, you need to have an idea about its components and possible causes of failure. Since the angle grinder is the most in demand, subsequent repairs will be considered on its example.

According to the design and external characteristics, such a machine is a grinder, as it consists of the same parts.

protective cover;
ventilation hole;
push button switch;
side handle;
spindle lock.

Repair of the grinder should be done carefully and slowly, since the consequences of repairing power and electronic components can turn a minor breakdown into unsuitability of the device.

It will take not so many tools to repair the grinder:

A grease-caked bearing is a common cause of grinder breakdowns.

The machine has internal components and mechanisms, the device of which also needs to be sorted out;

When repairing, it is recommended to rely on the layout and electrical diagrams, to have on hand the instructions that were attached to this particular model of the grinder. But such instructions do not go to many models, in this case it is most reasonable not to carry out repairs on your own, but to seek help from the service.

When repairing any equipment, the sequence must be followed. Simple faults are:

Video (click to play).

First of all, the electric brushes are checked, since there is a possibility that they are not getting current from the power supply.

To replace the bearing, you need to remove the horseshoe retainer.

Specifically, the problem may be in the power plug or in the wire itself, and the Start button may also not work. To fix the problem, the case is disassembled and the wiring is called using a break tester. In frequent cases, the problem is in the wiring, and after replacing it, the grinder will work again;

After checking, the wires and the plug are intact, and the device does not show any working signs. In this case, the starting block is disassembled, and the elements to be removed are marked, since if they are incorrectly connected during assembly, this may lead to the winding burning or the armature may jam. The button is replaced with a similar model;
The start button and power cable work, but the machine refuses to work. In this case, it is recommended to examine the brush holder. The most common problem is the contact plates of the collector, which, after stripping, will begin to give a spark and an even buzz. If these signs are not given, then the brushes must be replaced, since their service life is limited. If many models are made with a soldered connection of the brushes, then in this case it is necessary to solder and change as a set, since a partial replacement is not made;
After changing the electric brushes, they should be carefully examined if the wear is uneven - this is a sign of a shift in the center of gravity or internal moving parts. If such a problem occurs, it is recommended to contact a specialized service, since it is impossible to adjust the balance yourself.

Brush repair is a minor repair when troubleshooting, but more serious breakdowns are best left to specialists.

Also, to prevent malfunctions, it is recommended to follow the basic rules of operation:

unnecessarily, it is forbidden to remove the casing above the abrasive wheel, and if this is indispensable, then the tool must not be allowed to touch;
the machine must be held firmly in your hands, if the disk jams, the device may break out of your hands, in connection with this the machine can be seriously damaged and cause injury;
during the operation of the grinder sparks are formed, it is necessary to avoid their contact with wires and similar flammable materials;
the part to be sanded is important to firmly fix.

In addition, you can not put pressure on the parts to speed up the work. Abrasive wheels work on the principle of removing the top layer, and therefore do not require clamping.website of home craftsmen, professional advice and useful information for everyone who loves to craft and knows how to work with their own hands Image - Do-it-yourself grinder repair bearing replacement

Detailed photo report on the replacement of the armature bearings of an angle grinder (Bulgarians) 1400W 220V.

The angle grinder got its nickname “Bulgarian” back in the days of the Union. Because at that time this instrument was manufactured and supplied from Bulgaria. Bulgarian in the arsenal of home tools is the most versatile and multifunctional assistant. Bulgarian in work it is subjected to strong and uneven loads and long periods of operation, therefore, malfunctions occur more often than with other power tools.

In my Bulgarian when turned on, there was an extraneous overtone and increased vibration. It is more expensive to operate a tool with such signs.

Bulgarian repair We start by unscrewing the four screws of the gearbox cover.

Using a screwdriver, remove the gearbox cover assembly with the output shaft and gear. The output shaft bearing turned out to be working, without backlash and jamming.

But the front anchor bearing - completely crumbled. The bearing balls were in the gearbox lubrication, the small gear retaining ring was worn on one side. To replace the front bearing, you must first unscrew the covers of the contact brushes of the armature and remove the brushes.

Then we unscrew the four screws securing the gearbox of the grinder to the stator and remove the anchor along with the gearbox housing.

To remove and install the retaining ring of the armature gear, you need to make a simple tool. For this I used old scissors. The tips of the scissors on the emery were ground off, as in the photo.

This is what my retaining ring looked like. For the convenience of mounting the retaining ring during the assembly of the gearbox, the tips of the scissors were red-hot with a gas burner and bent at a right angle to the plane of the scissors. Then again heated and cooled in engine oil.

After dismantling the armature gear, I removed the armature from the gearbox housing. Here is a view of the front armature bearing.

We buy new bearings and a retaining ring in the store, we continue grinder repair.

The outer race of the armature bearing is removed from the gearbox housing by lightly tapping on a metal screwdriver inserted from the inside of the gearbox housing into the race groove. It is important not to skew the clip when pressing out.

But the inner race of the bearing sat tightly on the armature shaft.

To dismantle it, I used a standard thread holder.

Studs were unscrewed from it for rotation when threading. And the lehr holder itself is installed on the bearing cage, so that the screws for fixing the lerka fall into the groove of the bearing cage. Then we tighten the screws evenly from each side and thus securely fasten the leer holder to the clip. Now we grab the paws of the puller by the lerkoderzhatel and remove the clip from the shaft.

This is how my front armature bearing looked Bulgarians.

New bearings must be filled with grease. To do this, you need a sharp awl, Litol 24 grease and a mandrel for mounting bearing caps. To lubricate the sealed bearing, you need to remove the cover by prying it with an awl, as in the photo.

Now fill the bearing with grease and put the cover in place.

In order to put the cover into the bearing without damage, you need to select a mandrel with a diameter slightly larger than the outer diameter of the bearing cover. I used a socket wrench.

Bearings are lubricated. We press the front bearing into the gearbox housing using the outer race of the old bearing and fix it with a flange.

At anchor, the anchor collector is cleaned with P1000 sandpaper. With a clerical knife, carefully, without much pressure, we clean the paths between the collector lamellas. And after these operations, the collector is thoroughly wiped with a cotton cloth moistened with white spirit or other solvent.

Next, you need to press the armature shaft into the inner race of the front bearing. To do this, place the gearbox housing on a wooden surface with the bearing up. We insert the armature shaft into the bearing cage from above and with a light tap, through the mandrel, on the rear armature bearing, put the anchor in place.

We put a small gear on the armature shaft. If, after installing the gear, the groove for the retaining ring extends beyond the end of the gear, then the installation was done correctly. We put the retaining ring in place.

If the groove did not come out due to the end of the gear or came out halfway, the shaft must also be planted in the housing.

After these operations, remove the old rear bearing from the armature shaft and install a new one. We place the anchor with the gearbox in the stator and tighten the four screws securing the gearbox. Check the shaft for rotation. The shaft should rotate easily without jamming in the bearings. We put the contact brushes in place and screw their covers. Now we put a special lubricant for the angle grinder in the gearbox Bulgarians and put the gearbox cover with the secondary shaft in place.

We tighten the four mounting screws and check grinderby connecting to the network.

Bulgarian should quickly gain momentum and work without extraneous overtones. On this grinder repair can be considered completed. Good luck with your work!

Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.

After reviewing many videos on the topic of removing the anchor from the grinder, I came to the conclusion that no one knows how to remove it without breaking anything. I will tell you and show you how to do it.

#I bought a new tool for free, after 5 minutes there was a big spark. The test windings are in order, 2 lamellas burned out and fell out. After the repair, I worked for 1-2 minutes with a minimum load, which helped to complete the work, then I bought a new anchor for the reserve. Dear viewer, I will be very grateful if you support the channel of my novice friend, with a lot of free time that he will devote to your account. On the channel can be exited by the link to one of the videos. Thank you for your understanding.

The replacement of all rolling bearings in the grinder was considered, with disassembly and assembly, I tried to show it as intelligibly as possible.

One of the ways to make a small puller from improvised materials is considered. More information at https://my.housecope.com/wp-content/uploads/ext/2532 current, voltage, power, frequency. Get short and capacious information about resistance, capacitor, diode, transistor, microcircuit, circuit diagram. The channel deals with such topics as automotive electronics, alternative energy, independent energy, TV repair, do-it-yourself electronics repair. – Playlists: – Subscribe:

I make a unique homemade product, you can say a tool for fixing thoughts, ideas, drawings, diagrams. The tool is made entirely by hand from available materials.

Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.

The replacement of all rolling bearings in the grinder was considered, with disassembly and assembly, I tried to show it as intelligibly as possible.

I make a unique homemade product, you can say a tool for fixing thoughts, ideas, drawings, diagrams. The tool is made entirely by hand from available materials.

Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.

Published: 12 months back

The replacement of all rolling bearings in the grinder was considered, with disassembly and assembly, I tried to show it as intelligibly as possible.

Published on Mar 10, 2017
Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.
YouTube Editor

The upper bearing is checked by weight holding the gearbox vertically with the anchor down, turn the shaft and feel with your hand whether the balls are nibbling the cage, if there is wear in the balls, you will definitely feel it in your hand.

on the video, you didn’t check it correctly, you need to hold the body in your hand, not twist it, but unwind the anchor, then you will feel the vibration of the balls gnawing the inside of the clip in your hand from the body. Because the body weight is only 60-80 grams and it will not give any load to the bearing. Always if there are two or more bearings on the shaft, then always the bearings are changed only in pairs. do not spare money, a 629ZZ SKF bearing costs no more than 200 rubles or 80 UAH and it is cheaper than screwing up a grinder or pulling out the remains of torn off metal from your body in a hospital.

Yuri, hello. Thanks for your comment. So, in a similar way, I checked the upper bearing, so I did not change it.

Afficher les commandes du lecteur

Ajoutee 10 mars 2017
Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.
YouTube Editor

on the video, you didn’t check it correctly, you need to hold the body in your hand, not twist it, but unwind the anchor, then you will feel the vibration of the balls gnawing the inside of the clip in your hand from the body.Because the body weight is only 60-80 grams and it will not give any load to the bearing. Always if there are two or more bearings on the shaft, then always the bearings are changed only in pairs. do not spare money, a 629ZZ SKF bearing costs no more than 200 rubles or 80 UAH and it is cheaper than screwing up a grinder or pulling out the remains of torn off metal from your body in a hospital.

Yuri, hello. Thanks for your comment. So, in a similar way, I checked the upper bearing, so I did not change it.

Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.

Over time, a gear bearing play appeared in my angle grinder, and the disk began to live its own life, therefore.

Considered the replacement of all rolling bearings in the grinder, with disassembly and assembly tried to maximize income.

How to replace a bearing in a grinder Interskol angle grinder 125/900. Bearing dimensions 12*32*10 (in*out*wide).

Replaced the bearing on the USSR.

Don't forget to share videos!) Enjoy watching!) My affiliate program on You Tube: .

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Group in VK: MV: VK: .

I just shared that using such a puller is cool when replacing different bearings.

According to the client's complaint, a large gearbox shaft play, the following work was carried out on the grinder Bosch GWS20-230:.

The process of disassembling the angle grinder is inextricably linked with the disassembly of the grinder gearbox, since they are one.

Few people know how to remove the rotor from the reducer an angle grinder while doing nothing to break and press in again .

Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.

Yury Full 2 miesięcy temu

Roman Pchelintsev 2 miesięcy temu

Yuri, hello. Thanks for your comment. So, in a similar way, I checked the upper bearing, so I did not change it.

Roman Pchelintsev 4 miesięcy temu

Stanislav, hello. The bearing was lubricated so that dust would not penetrate into it. This is certainly not a panacea, but life prolongs a little.

Valery Bartkevich 5 miesięcy temu

Like for the filmers, I went to do it.

Roman Pchelintsev 2 miesięcy temu

Valery, hello. Thank you for rating)))

Grisha Cheban 6 miesięcy temu

Of all the videos on YouTube, yours is simple and clear.

Roman Pchelintsev 6 miesięcy temu

Hello. Thank you for the kind words.

Vladislav Sergeev 6 miesięcy temu

If the top one also showed the bearing, generally respect)

Roman Pchelintsev 6 miesięcy temu

Vladislav, hello. This time there was no need to change it. I'll have a chance to show you. Thank you.

on the video, you didn’t check it correctly, you need to hold the body in your hand, not twist it, but unwind the anchor, then you will feel the vibration of the balls gnawing the inside of the clip in your hand from the body. Because the body weight is only 60-80 grams and it will not give any load to the bearing. Always if there are two or more bearings on the shaft, then always the bearings are changed only in pairs.do not spare money, a 629ZZ SKF bearing costs no more than 200 rubles or 80 UAH and it is cheaper than screwing up a grinder or pulling out the remains of torn off metal from your body in a hospital.

Yuri, hello. Thanks for your comment. So, in a similar way, I checked the upper bearing, so I did not change it.

Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.

The replacement of all rolling bearings in the grinder was considered, with disassembly and assembly, I tried to show it as intelligibly as possible.

I make a unique homemade product, you can say a tool for fixing thoughts, ideas, drawings, diagrams. The tool is made entirely by hand from available materials.

A visual video on cleaning the rotor collector (armature) at home. I recommend that you carry out the procedure with each replacement of the brushes, at the same time carry out a more thorough troubleshooting of bearings and other related components, as well as replace the lubricant in the mechanisms. This is a quick and easy, yet effective way to level and condition the commutator surface, which will greatly extend the life of the brushes. The Tools Review channel is dedicated to the most detailed video reviews of power tools. If you have any wishes / suggestions for further videos, then I will be happy to read your opinion. Also, please leave a real review of the operation of this tool in the comments.

Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.

The replacement of all rolling bearings in the grinder was considered, with disassembly and assembly, I tried to show it as intelligibly as possible.

I make a unique homemade product, you can say a tool for fixing thoughts, ideas, drawings, diagrams. The tool is made entirely by hand from available materials.

Yuri, hello. Thanks for your comment. So, in a similar way, I checked the upper bearing, so I did not change it.

Published on Mar 10, 2017
Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.
YouTube Editor

Yuri, hello. Thanks for your comment. So, in a similar way, I checked the upper bearing, so I did not change it.

Afficher les commandes du lecteur

Ajoutee 10 mars 2017
Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.
YouTube Editor

Yuri, hello. Thanks for your comment. So, in a similar way, I checked the upper bearing, so I did not change it.

Published on 10 Mar 2017
Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.
YouTube Editor

Yuri, hello. Thanks for your comment. So, in a similar way, I checked the upper bearing, so I did not change it.

Show Control Panel

Published: 10 Mar 2017
Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.

Yuri, hello. Thanks for your comment. So, in a similar way, I checked the upper bearing, so I did not change it.

Sometimes it is better to carry out preventive maintenance of the tool in time than to get into expensive repairs.

The replacement of all rolling bearings in the grinder was considered, with disassembly and assembly, I tried to show it as intelligibly as possible.

I make a unique homemade product, you can say a tool for fixing thoughts, ideas, drawings, diagrams. The tool is made entirely by hand from available materials.

Video (click to play).