Roller for trimming grinding wheel

The invention discloses a roller for trimming a grinding wheel. The roller comprises a roller body, the roller body comprises an axial surface and a radial surface, a boss is arranged on the axial surface along the axis of the roller body, a spline tooth groove is formed in the inner wall of a counter bore, a spline shaft is arranged on the side, close to the spline tooth groove, of the outer surface of a shaft head, an external thread is arranged on the side, away from a limiting cam, of the outer surface of the shaft head, a mounting cam is mounted on the side, close to the external thread, of the outer surface of the shaft head in a threaded mode, a chamfer machining surface is arranged at the joint of the radial surface and the axial surface, and a fillet machining surface is arranged at the joint of the chamfer machining surface and the axial surface. The roller relatively fits the shaft head when assembled with the shaft head, the jumping condition does not occur easily when the grinding wheel is trimme