滾(gun)針(zhen)軸(zhou)承(cheng)(cheng)(cheng)(cheng)裝(zhuang)有(you)細而長的滾(gun)子(滾(gun)子直徑(jing)D≤5mm，L/D≥2.5，L為(wei)滾(gun)子長度(du))，因(yin)此徑(jing)向(xiang)結構(gou)緊湊，其(qi)內(nei)徑(jing)尺寸(cun)和載荷(he)(he)能(neng)力與(yu)其(qi)它(ta)類型軸(zhou)承(cheng)(cheng)(cheng)(cheng)相(xiang)(xiang)同(tong)時，外徑(jing)最小(xiao)，特別適(shi)用于(yu)徑(jing)向(xiang)安裝(zhuang)尺寸(cun)受限制的支承(cheng)(cheng)(cheng)(cheng)結果。根據使用場合不同(tong)，可選(xuan)用無內(nei)圈(quan)的軸(zhou)承(cheng)(cheng)(cheng)(cheng)或滾(gun)針(zhen)和保(bao)持架組件，此時與(yu)軸(zhou)承(cheng)(cheng)(cheng)(cheng)相(xiang)(xiang)配的軸(zhou)頸表面(mian)和外殼(ke)(ke)孔表面(mian)直接作為(wei)軸(zhou)承(cheng)(cheng)(cheng)(cheng)的內(nei)、外滾(gun)動表面(mian)，為(wei)保(bao)證(zheng)載荷(he)(he)能(neng)力和運轉性(xing)能(neng)與(yu)有(you)套(tao)(tao)圈(quan)軸(zhou)承(cheng)(cheng)(cheng)(cheng)相(xiang)(xiang)同(tong)，軸(zhou)或外殼(ke)(ke)孔滾(gun)道(dao)表面(mian)的硬度(du)，加工(gong)精度(du)和表面(mian)質量應與(yu)軸(zhou)承(cheng)(cheng)(cheng)(cheng)套(tao)(tao)圈(quan)的滾(gun)道(dao)相(xiang)(xiang)仿。此種軸(zhou)承(cheng)(cheng)(cheng)(cheng)僅(jin)能(neng)承(cheng)(cheng)(cheng)(cheng)受徑(jing)向(xiang)載荷(he)(he)。