Do-it-yourself skil grinder repair

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;

1. 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;
2. 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 spark and 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;
3. 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.