直(zhi)線(xian)導軌(gui)(gui)又(you)稱線(xian)軌(gui)(gui)、滑(hua)(hua)軌(gui)(gui)、線(xian)性導軌(gui)(gui)、線(xian)性滑(hua)(hua)軌(gui)(gui)，用于高(gao)(gao)精(jing)或高(gao)(gao)速直(zhi)線(xian)往復運(yun)動(dong)場合，且(qie)可以承擔(dan)一定的扭矩，可在(zai)高(gao)(gao)負載的情況下(xia)實現高(gao)(gao)精(jing)度的直(zhi)線(xian)運(yun)動(dong)。

直線(xian)(xian)(xian)導(dao)軌運(yun)(yun)動(dong)(dong)(dong)的(de)(de)(de)(de)作(zuo)用(yong)是(shi)用(yong)來(lai)支(zhi)撐(cheng)和引(yin)(yin)導(dao)運(yun)(yun)動(dong)(dong)(dong)部件，按給定的(de)(de)(de)(de)方(fang)向做往復直線(xian)(xian)(xian)運(yun)(yun)動(dong)(dong)(dong)。　直線(xian)(xian)(xian)軸承主要用(yong)在自動(dong)(dong)(dong)化機(ji)械上比較多,像直線(xian)(xian)(xian)導(dao)軌主要是(shi)用(yong)在精(jing)(jing)度(du)要求(qiu)比較高(gao)的(de)(de)(de)(de)機(ji)械結構上,直線(xian)(xian)(xian)導(dao)軌的(de)(de)(de)(de)移動(dong)(dong)(dong)元(yuan)件和固定元(yuan)件之間(jian)(jian)(jian)不用(yong)中(zhong)間(jian)(jian)(jian)介質，而用(yong)滾(gun)動(dong)(dong)(dong)鋼球。可以(yi)理解為是(shi)一(yi)種滾(gun)動(dong)(dong)(dong)導(dao)引(yin)(yin)，是(shi)由鋼珠在滑塊(kuai)(kuai)跟導(dao)軌之間(jian)(jian)(jian)無限(xian)滾(gun)動(dong)(dong)(dong)循環(huan)， 從而使負載(zai)平(ping)臺沿(yan)著導(dao)軌輕易(yi)的(de)(de)(de)(de)高(gao)精(jing)(jing)度(du)線(xian)(xian)(xian)性(xing)運(yun)(yun)動(dong)(dong)(dong)，并(bing)將摩擦系數降至(zhi)平(ping)常傳統(tong)滑動(dong)(dong)(dong)導(dao)引(yin)(yin)的(de)(de)(de)(de)五十分之一(yi)，能輕易(yi)地達到很高(gao)的(de)(de)(de)(de)定位精(jing)(jing)度(du)。滑塊(kuai)(kuai)跟導(dao)軌間(jian)(jian)(jian)末制單元(yuan)設(she)計，使線(xian)(xian)(xian)形(xing)導(dao)軌同時承受上下左右等各方(fang)向的(de)(de)(de)(de)負荷(he)，回流系統(tong)及精(jing)(jing)簡化的(de)(de)(de)(de)結構設(she)計讓線(xian)(xian)(xian)性(xing)導(dao)軌有(you)更(geng)平(ping)順且低噪音的(de)(de)(de)(de)運(yun)(yun)動(dong)(dong)(dong)。

滑(hua)塊-使(shi)運動由曲線(xian)轉變(bian)為直(zhi)線(xian)。

直線(xian)導(dao)軌主要是用在精度要求比較高(gao)(gao)的(de)機(ji)(ji)(ji)械(xie)結構上,直線(xian)導(dao)軌的(de)移動元件(jian)和(he)固定(ding)元件(jian)之間不用中間介質，而用滾(gun)(gun)動鋼球。因為滾(gun)(gun)動鋼球適應(ying)于(yu)高(gao)(gao)速運(yun)動、摩擦系數小、靈敏度高(gao)(gao)，滿足運(yun)動部件(jian)的(de)工(gong)作要求，被(bei)廣泛應(ying)用在自(zi)動化(hua)機(ji)(ji)(ji)械(xie)上比較多(duo),像磨床、銑床、車(che)床、檢測儀器設(she)備、木工(gong)機(ji)(ji)(ji)械(xie)、搬運(yun)機(ji)(ji)(ji)械(xie)、傳送裝置、自(zi)動化(hua)機(ji)(ji)(ji)械(xie)、半導(dao)體機(ji)(ji)(ji)械(xie)、包裝機(ji)(ji)(ji)械(xie)、機(ji)(ji)(ji)械(xie)手臂、自(zi)動化(hua)機(ji)(ji)(ji)床、激光(guang)行業、汽(qi)車(che)制(zhi)造、新能源等行業。