ベアリング、ローラー(改造したもの)の転動体を間隔をあけて保持するフレームまたはエンクロージャ。
copper alloy 642 overall material, 0.4500 inches minimum and 0.4600 inches maximum overall width, 1.5840 inches minimum and 1.5870 inches maximum bore diameter, qq-c-465,alloy 642 fed spec 1st material response or qq-c-390,alloy g6 fed spec 2nd material response overall material document and classification, 1.7910 inches minimum and 1.8010 inches maximum outside diameter