This is a precision chain saw grinder giving accurate sharpening of ... an This Dual Power bench/wall-mount grinder uses a 220W, 50Hz motor as power source, grinds almost ... 325 and 3/8" 404. With a wheel max. rpm of 7500, this grinder features a large transparent protective cover, operation handle, ... clamping, depth adjuster, an on/off switch and a spring-loaded grind head can be easily adjusted up ...