1. wear protective masks (or face shields) and glasses when working. Before working, check whether the grinding wheel is damaged, whether the safety protection device is intact, and whether the ventilation and dust removal device is effective. When installing, we should pay attention to the tightenth degree of the nut. It should be pressed tight to the movement of the grinding wheel, and it should not be easy to slide. When there are many compressing screws, it should be gradually tightened in the diagonal order.
2.砂轮装好后，必须将防护罩重新装好，再进行试转。直的砂轮，应空转5 分钟。砂轮转动时，不允许有明显震动。打磨抛光时，应先启动吸尘装置，握牢工件，用力不得过猛，不准用杠杆推压元件，严禁站在砂轮正面操作，以防砂轮破裂伤人。 7.6 不是专门用于端面磨削的砂轮，禁止用端面进行打磨抛光。使用手持电动砂轮机打磨抛光时，必须有牢固的防护罩和加设保护接零线，或配用漏电保护器，并遵守以下电动手砂轮安全操作规程。
2. when the grinding wheel is installed, the protective cover must be reloaded and tested again. The straight grinding wheel should be turned for 5 minutes. When the wheel is rotated, no obvious vibration is allowed. When polishing and polishing, we should start the suction device first, hold the workpiece firmly, not be too hard, not to use the lever push element, strictly prohibit the operation of the wheel on the front of the grinding wheel, in order to prevent the grinding wheel from breaking the person. 7.6 is not a grinding wheel specially used for face grinding. It is forbidden to polish and polish with the end face. The use of a hand-held electric grinder for polishing and polishing must have a solid protective cover and a protective zero line, or a leakage protector, and comply with the following safety operation rules for the electric hand grinding wheel.
3. when two or more people are polishing and polishing at the same time, they are 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. No sharp force must be exerting. The edges and corners of the workpiece should not be worn to prevent the grinding wheel from breaking and hurting people. After the work is finished, the power shall be cut off before the wheel is stopped.