Grinder is used to grinding various props, tools commonly used equipment. Grinding machine, which is mainly from the base, wheel, motor, or other power source, the bracket, protective cover, wheel is provided on the top surface of the base, the base having an internal power source for the receiving space, a drive power source reducer, reducer having a top surface of the drive shaft piercing the base for fixedly connected wheel. With the overall sound transmission mechanism is very streamlined, making the process more convenient and smooth grinding and grinding machine grinding to improve the overall performance effect. Wheel more brittle, speed is high and should be used strictly observe safety rules.