一種單排或多排減摩軸承,帶或不帶內圈或外圈,其特點是滾輪尺寸相對較小,直徑通常不超過 0.250 英吋(6.35 毫米),長度通常比直徑長。
gearbox assembly end item identification, steel overall material, needle bearing part name assigned by controlling agency, astm a29 stl assn std single material response overall material document and classification