flap wheel for regulating easily

bench grinder wheels are designed finished to guarantee the central line of workpiece and knife wheel is exact. Thus, the outer angle, inner angle and pipe end machining may be finished evenly at one time. flap wheel makes use of the change of belt wheel to shift different rotate speeds, so the life of blade may be as long s possible according to different metal materials. The double-step feeding system saves working time. And the speed is slow for regulating easily.