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。
qq-c-465,alloy 642 fed spec 1st material response or alloy 954,type 2 or 3 fed spec 2nd material response overall material document and classification, 0.5240 inches minimum and 0.5340 inches maximum overall width, copper alloy 642 overall material, 2.0640 inches minimum and 2.0670 inches maximum outside diameter, 1.6190 inches minimum and 1.6290 inches maximum bore diameter