How to repair a hammer drill when the brushes wear out

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If the graphite brushes on the hammer drill are worn out, which are designed to transmit current to the collector connected to the anchor winding. The principle of operation of electric motors is to create a magnetic field by the stator, which helps to drive the moving part - the anchor or rotor.

Over time, the graphite brushes on the hammer drill wear out, which is absolutely normal. When they wear out, the quality of contact decreases, so if there is strong sparking, which is visible through the ventilation holes in the hammer drill body, as well as if you detect the smell of burning and smoke, you need to replace the brushes. These elements are not repaired, since they are classified as consumables.If they are worn out, then the electric motor brushes will need to be replaced. The brushes are changed quite simply, for which it is necessary to remove them from the brush unit, having previously unscrewed the screws, disconnect the power wires that come from the button, and then install new ones in the reverse order of removal.



You can determine the malfunction and unsuitability of the canada telegram data brushes for further use by measuring the length of their working part. If the length of the graphite base is less than 8 mm, then the elements need to be replaced. After replacement, the hammer drill will work like new. The process of replacing brushes on the Einhell barrel hammer drill is described in the video material.



Speed ​​controller malfunctions
Not all models of hammer drills have a speed controller.This device is usually located in the design of the push-button mechanism. If the design of your tool has a chuck speed regulator that has failed, then it cannot be repaired, so it should be replaced.

A sign such as the absence of a change in the chuck rotation speed will help to identify a regulator malfunction. Another reason for the regulator malfunction may be the complete inoperability of the tool.