1. Inspection bit
The use of dull or bent drills will make the working condition of the motor overload surface abnormal and reduce the operating efficiency. Therefore, if this kind of situation is found, it should be dealt with and replaced immediately.
2. Inspection of fastening screw of electric drill body
Before use, check the fastening condition of the installation screw of the electric drill body. If the screw is loose, it should be re-tightened immediately, otherwise it will cause the electric drill failure.
3. Check Carbon Brush
Carbon brushes on motors are consumables. Once their abrasion exceeds the limit, the motor will fail. Therefore, the worn carbon brushes should be replaced immediately. In addition, the carbon brushes must always be kept clean.
4. Protection Grounding Wire Inspection
Protecting grounding wire is an important measure to protect personal safety. Therefore, the type I appliances (metal enclosures) should be checked regularly for good grounding of their enclosures.