Grinding wheel having urethane resin bushing in its center mounting hole

摘要

A grinding wheel having a main body and a tubular bushing member which is fitted in an inner circumferential surface of a mounting hole formed through the main body, so that the grinding wheel is mounted on a wheel spindle of a grinding machine, with the bushing member being fitted on the wheel spindle. The bushing member includes an urethane resin as a main component thereof.