Patent ID: 7331845

Claim:
An opposite end surface truing device for truing grinding surfaces at opposite ends of a grinding wheel with an opposite end surface truing tool by effecting relative movements between the grinding wheel and the opposite end surface truing tool being rotated respectively, in a first direction and a second direction transverse thereto, wherein the opposite end surface truing tool comprises: a disc-like base supported to be rotatable about a rotational axis thereof, a first end surface truing section composed of a cylindrical first base body which protrudes bodily from a circumferential portion at one end surface of the disc-like base coaxially with the rotational axis of the same and a first abrasive grain layer in which numerous diamond abrasive grains are adhered with bond material to an external surface of the first base body, and a second end surface truing section composed of a cylindrical second base body which protrudes bodily from a circumferential portion at the other end surface of the base coaxially with the rotational axis and a second abrasive grain layer in which numerous diamond abrasive grains are adhered with bond material to an internal surface of the second base body, and wherein the rotational axis of the opposite end surface truing tool is inclined relative to the rotational axis of the grinding wheel within almost the same plane at a predetermined inclination angle.