1. Wear a protective mask and glasses when working. Before work, check the grinding wheel is damaged or not. make sure safety protection device is intact, and whether the ventilation dust removal device is effective. When installing, pay attention to the degree of compression of grinder. It should be pressed until the grinding wheel moves without slipping.

2. when grinding wheel is installed, the protective cover must be taken. Straight grinding wheel should be idling testing for 5 minutes. When the grinding wheel rotates, make sure no obvious vibration. When grinding and polishing, the dust suction device should be activated first, and the wheel should be gripped. The force should not be too strong. It is not allowed to push the components too heavy. It is strictly forbidden to stand on the front of the grinding wheel to prevent the grinding wheel from rupturing and injuring people.

3. When two or more people are polishing at the same time, it is not allowed to work in the same direction at the same time to prevent accidents. The concave and convex parts of the workpiece should be lightly polished and polished. Do not use excessive force and do not grind the edges and corners of the workpiece to prevent the grinding wheel from being broken and hurting people. After the work is completed, the power should be cut off to confirm that the grinding wheel has stopped before leaving the post.