Patent ID: 9550275
Date: 2017-01-24
CPC Classifications: B24D

Claim:
1. A disc-shaped grindstone in which a plurality of split grindstones are provided in an outer circumferential surface of a disc-shaped base, wherein the split grindstones include at least one moving grindstone which is movable in an axial direction of the disc-shaped base, wherein a corner portion in the axial direction of each split grindstone is formed in a curved surface shape, wherein at least one split grindstone which is fixed to the disc-shaped base so as not to be movable in the axial direction among the split grindstones is defined as a fixed grindstone, and wherein the moving grindstone and the fixed grindstone are formed so that a curvature radiuses of the corner portions in the axial direction are different from each other.