1, the reinforcement wheel should be reinforced with resin type, and the safety line speed should not be less than 80m / s.. The cables and plugs should be reinforced with insulation performance and must not be changed at will.

2. When grinding, the grinding wheel and the workpiece surface should be kept in an inclined position of 15 to 30 degrees, and the grinding wheel should not be tilted and not swinging horizontally.