1. Selection criteria. Regarding different drilling diameters, the appropriate electric drill standards should be selected as much as possible.
2. Pay attention that the voltage should match. When connecting with the power supply, pay attention to whether the power supply voltage matches the rated voltage of the electric drill.
3. Check the edge resistance. For electric drills or new electric drills that are not necessary for a long time, use a 500V insulation resistance meter to measure the insulation resistance between the winding and the casing before use. The resistance must not be less than 0.5Mf, otherwise it should be monotonically processed.
4. Drilling. The drill bit used is sharp, do not use too much force when drilling, and the electric drill is overloaded. When the speed drops suddenly. Assuming that when the drill suddenly stops, the power supply should be blocked.
5. There should be protective insulation. Check whether the grounding wire is excellent before use.
6. Idling test. It should be idled for 1min before use to check whether the electric drill is working normally. During the trial rotation of the three-phase electric drill, you should also check whether the rotation direction of the drill shaft is normal. If the rotation is not correct, you can arbitrarily swap two three-phase electric wires of the electric drill to change the rotation direction.
7. Refined orientation. When moving the electric drill, hold the handle of the electric drill. Do not delay the power cord to move the electric drill, and the power cord will be scratched or broken.
8. The electric drill should be handled gently after use. Damage the shell or other parts by being impacted.