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。
2.2090 inches minimum and 2.2120 inches maximum bore diameter, 0.4500 inches minimum and 0.4600 inches maximum overall width, 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, 2.4120 inches minimum and 2.4220 inches maximum outside diameter, copper alloy 642 overall material