滾針軸(zhou)(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)裝有細而(er)長(chang)(chang)的滾子(zi)(滾子(zi)直徑(jing)D≤5mm，L/D≥2.5，L為(wei)(wei)滾子(zi)長(chang)(chang)度(du))，因此(ci)徑(jing)向結構緊(jin)湊，其內徑(jing)尺寸和(he)載荷能(neng)力(li)與其它類(lei)型軸(zhou)(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)相(xiang)(xiang)同(tong)時(shi)，外(wai)(wai)(wai)徑(jing)最小(xiao)，特別(bie)適用于徑(jing)向安裝尺寸受限(xian)制的支承(cheng)(cheng)(cheng)(cheng)結果。根據(ju)使(shi)用場合不同(tong)，可選用無內圈(quan)(quan)的軸(zhou)(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)或滾針和(he)保(bao)持架組件，此(ci)時(shi)與軸(zhou)(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)相(xiang)(xiang)配的軸(zhou)(zhou)(zhou)頸(jing)表(biao)面(mian)(mian)和(he)外(wai)(wai)(wai)殼孔(kong)表(biao)面(mian)(mian)直接作為(wei)(wei)軸(zhou)(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)的內、外(wai)(wai)(wai)滾動表(biao)面(mian)(mian)，為(wei)(wei)保(bao)證(zheng)載荷能(neng)力(li)和(he)運轉(zhuan)性能(neng)與有套圈(quan)(quan)軸(zhou)(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)相(xiang)(xiang)同(tong)，軸(zhou)(zhou)(zhou)或外(wai)(wai)(wai)殼孔(kong)滾道表(biao)面(mian)(mian)的硬度(du)，加工精(jing)度(du)和(he)表(biao)面(mian)(mian)質量(liang)應(ying)與軸(zhou)(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)套圈(quan)(quan)的滾道相(xiang)(xiang)仿。此(ci)種軸(zhou)(zhou)(zhou)承(cheng)(cheng)(cheng)(cheng)僅能(neng)承(cheng)(cheng)(cheng)(cheng)受徑(jing)向載荷。