idler

[img_assist|nid=11965|title=Idler Set Equipped With Belt Scale|desc=|link=none|align=right|width=153|height=110]A broad roller carrying the weight of the conveyor and its load. Idler rollers are placed symmetrically about the belt centre line, usually in sets of three with the centre one horizontal and the two outer ones at an angle so as to bend the belt into a trough shape.