Do not be too tight between the chain and the guide plate. When the electric chain saw works, the lubricating oil can be used once every 10 minutes to maintain not only the guide plate but also the chain. Meanwhile, the variable box of the chainsaw also needs glycerine once a year, and the motor needs to change the carbon brush frequently, about once every six months.

Chain saws are not allowed to operate under the following conditions.

1. When someone approaches;

2. Before the auxiliary staff of materials are evacuated to a safe area;

3. The original article in the operation area is not stowed stably;

4. Insufficient light;

5. In rainy days, the wind is stronger than level 5 and the open ground with thunder and lightning;

6, no broken chain protection and rebound protection device, or device damage.