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。
afbma std tolerance for industrial needle bearings standard tolerance designation, rigid alignment type, 3.1250 inches nominal bore diameter, 4.7500 inches nominal overall outside diameter