Patent ID: 6986702

Claim:
A centerless grinding apparatus, comprising: an outer diameter surface grinding wheel for grinding an outer diameter surface of a work of a substantially cylindrical shape; a regulating wheel for supporting the outer diameter surface of the work in conjunction with the outer diameter surface grinding wheel; an end surface grinding wheel for grinding an end surface of the work, said end surface grinding wheel being a cup grinding wheel, wherein the end surface grinding wheel grinds the end surface of the work while the outer diameter surface grinding wheel grinds the outer diameter surface of the work in a state that the work is disposed between the outer diameter surface grinding wheel and the regulating wheel; and a clearance between said outer diameter surface grinding wheel and said end surface grinding wheel is set equal to a chamfer distance of the work minus (D/2·sin θ) minus a margin of the outer diameter surface grinding wheel edge, wherein: D is a diameter of an end surface of the work; and θ is a crossing angle between a rotation axis of the work and a rotation axis of the end surface grinding wheel, wherein the rotation axis of the work and the rotation axis of the end surface grinding wheel cross at a crossing point such that a distance from the crossing point to the end surface of the work coincides with a radius of curvature of the end surface.