直(zhi)(zhi)線軸承是與(yu)淬火(huo)直(zhi)(zhi)線傳(chuan)(chuan)動軸配合使用。作無(wu)限直(zhi)(zhi)線運(yun)(yun)動的系統(tong)。負(fu)荷滾(gun)珠和淬火(huo)傳(chuan)(chuan)動軸因(yin)為(wei)是點接觸，容許載荷較(jiao)小(xiao)，但(dan)直(zhi)(zhi)線運(yun)(yun)動時，摩擦(ca)阻力(li)最小(xiao)，精(jing)度高，運(yun)(yun)動快捷。

塑(su)料(liao)(liao)直線(xian)(xian)(xian)軸(zhou)(zhou)(zhou)承(cheng)軸(zhou)(zhou)(zhou)承(cheng)配(pei)合軸(zhou)(zhou)(zhou)沒(mei)有特(te)殊(shu)(shu)要求；可以(yi)(yi)承(cheng)受比(bi)金(jin)屬(shu)軸(zhou)(zhou)(zhou)承(cheng)更大(da)的(de)(de)(de)載荷(he)，但由(you)于軸(zhou)(zhou)(zhou)承(cheng)與軸(zhou)(zhou)(zhou)之間(jian)的(de)(de)(de)運動(dong)(dong)(dong)是(shi)滑(hua)動(dong)(dong)(dong)摩擦，故塑(su)料(liao)(liao)直線(xian)(xian)(xian)軸(zhou)(zhou)(zhou)承(cheng)運動(dong)(dong)(dong)速(su)度(du)受到(dao)一定的(de)(de)(de)限制；運動(dong)(dong)(dong)阻(zu)力要比(bi)金(jin)屬(shu)直線(xian)(xian)(xian)軸(zhou)(zhou)(zhou)承(cheng)要大(da)；但其運動(dong)(dong)(dong)噪(zao)音要比(bi)金(jin)屬(shu)直線(xian)(xian)(xian)軸(zhou)(zhou)(zhou)承(cheng)低(di)，特(te)別(bie)是(shi)在(zai)在(zai)中(zhong)(zhong)高速(su)的(de)(de)(de)情(qing)況下，塑(su)料(liao)(liao)直線(xian)(xian)(xian)軸(zhou)(zhou)(zhou)承(cheng)噪(zao)音隨速(su)度(du)影響非常(chang)小。塑(su)料(liao)(liao)直線(xian)(xian)(xian)軸(zhou)(zhou)(zhou)承(cheng)由(you)于其內部(bu)帶(dai)有排屑(xie)槽設計，所以(yi)(yi)允(yun)(yun)許(xu)(xu)在(zai)灰塵較大(da)的(de)(de)(de)場合使(shi)用，灰塵在(zai)運動(dong)(dong)(dong)過(guo)程中(zhong)(zhong)自動(dong)(dong)(dong)從排屑(xie)槽中(zhong)(zhong)帶(dai)出軸(zhou)(zhou)(zhou)承(cheng)體(ti)摩擦面；塑(su)料(liao)(liao)直線(xian)(xian)(xian)軸(zhou)(zhou)(zhou)承(cheng)還允(yun)(yun)許(xu)(xu)在(zai)使(shi)用過(guo)程中(zhong)(zhong)清(qing)洗(xi)，特(te)殊(shu)(shu)材料(liao)(liao)制成的(de)(de)(de)內部(bu)滑(hua)動(dong)(dong)(dong)膜甚至可以(yi)(yi)長期(qi)用于液體(ti)中(zhong)(zhong)運行。