200 to 300 mesh. The purpose of grinding the seal cutter grinding wheel is shaping, and the cutter angle is determined by 200 to 300 meshes. Grinding wheel is one of the most widely used grinding tools. When in use, it can perform high-speed rough grinding, semi-fine grinding, fine grinding, grooving and cutting on the outer circle, inner circle, plane and various contours of metal or nonmetal workpieces.