DIY skil grinder repair

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

Grinding machine device.

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

In terms of structural and external characteristics, such a machine is a grinder, since it consists of the same parts.

• protective casing;
• 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 units can turn minor damage into the unusability of the device.

It doesn't take too many tools to repair the grinder:

A bearing baked from grease is a common cause of grinder breakdowns.

The machine has internal components and mechanisms, the structure of which also needs to be understood;

When repairing, it is recommended to rely on layout and electrical diagrams, to have on hand the instructions that were attached specifically to this 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).

The first step is to check the electric brushes, since there is a possibility that they do not receive current from the power supply.

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

Specifically, the problem may be with the plug or the wire itself, or the Start button may not work. To eliminate the problem, the case is disassembled and the wiring is ringed with an open-circuit tester. In frequent cases, the problem is precisely in the wiring, and after replacing it, the grinder will work again;

1. After checking, the wires and plug are intact, and the device does not show 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 can lead to the burning of the winding or the armature can 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 collector contact plates, which, after stripping, will begin to give a spark and an even hum. If these signs are not provided, then the brushes must be replaced, since their service life is limited. If many models are produced with a solder connection of brushes, then in this case it is necessary to solder and change in the kit, since a partial replacement is not performed;
3. After changing the electric brushes, they must be carefully inspected 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 department, since it is impossible to adjust the balance with your own hands.

Repair of brushes is a minor repair when troubleshooting a malfunction, but it is better to entrust more serious breakdowns to specialists.

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

• it is forbidden to remove the cover over the abrasive wheel unnecessarily, and if you cannot do without it, then you must not allow the tool to touch;
• the machine must be held firmly in your hands, if the disc is jammed, the device may break out of your hands, in this regard, the machine may be seriously damaged and cause injury;
• sparks are generated during the operation of the grinder, it is necessary to avoid their contact with wires and similar flammable materials;
• It is important to secure the part to be ground firmly.