베어링을 수용하도록 설계된, 대개 원형의 단단한 물체. 베어링의 위치를 정하지만, 베어링을 감싸거나 움직임을 제한하지는 않습니다.
0.1270 inches minimum and 0.1290 inches maximum bore diameter, steel comp 303 overall material, 0.0625 inches minimum and 0.0635 inches maximum overall width, 0.2450 inches minimum and 0.2500 inches maximum outside diameter, astm a582 or a581 type 303 assn std single material response overall material document and classification