出口(kou)托輥(gun)(gun)是帶(dai)式(shi)輸(shu)送(song)(song)(song)(song)機(ji)的重(zhong)(zhong)要部件(jian)，種(zhong)類多(duo)，數量(liang)大。它占(zhan)了一臺帶(dai)式(shi)輸(shu)送(song)(song)(song)(song)機(ji)總成(cheng)本的35%，產(chan)生了70%以上的阻力，因此(ci)托輥(gun)(gun)的質量(liang)尤(you)為(wei)重(zhong)(zhong)要。 托輥(gun)(gun)的作用是支撐輸(shu)送(song)(song)(song)(song)帶(dai)和(he)物(wu)料重(zhong)(zhong)量(liang)。托輥(gun)(gun)運轉(zhuan)   靈活。減少輸(shu)送(song)(song)(song)(song)帶(dai)同(tong)托輥(gun)(gun)的摩擦力，對占(zhan)輸(shu)送(song)(song)(song)(song)機(ji)總成(cheng)本25%以上的輸(shu)送(song)(song)(song)(song)帶(dai)的壽命起著關鍵作用。雖然托輥(gun)(gun)在帶(dai)式(shi)輸(shu)送(song)(song)(song)(song)機(ji)中是一個較小部件(jian)，結構并不(bu)復(fu)雜，但(dan)制造出的托輥(gun)(gun)并非易事。 

出口托輥的作用是支撐(cheng)輸(shu)(shu)送(song)帶(dai)和(he)物料重(zhong)量(liang)。托(tuo)輥(gun)(gun)運(yun)轉   靈活。減少輸(shu)(shu)送(song)帶(dai)同托(tuo)輥(gun)(gun)的摩擦(ca)力(li)，對(dui)占(zhan)輸(shu)(shu)送(song)機(ji)總成本25%以上的輸(shu)(shu)送(song)帶(dai)的壽命起著關鍵作用。雖然托(tuo)輥(gun)(gun)在(zai)帶(dai)式(shi)輸(shu)(shu)送(song)機(ji)中是一個較小部件(jian)，結構并不復雜，但制(zhi)造(zao)出的托(tuo)輥(gun)(gun)并非易(yi)事。

判斷出口托輥(gun)好(hao)壞的標準(zhun)有(you)以下幾條(tiao):托輥(gun)徑向(xiang)跳動(dong)量;托輥(gun)靈活度;軸向(xiang)竄動(dong)量。