1. According to the material, it can be divided into rubber idler, ceramic idler, nylon idler and insulating idler.
2. There are mainly trough idler groups, various parallel idler groups, various self-aligning idler groups, and various Impact idler groups.
(1) Grooved rollers include ordinary rollers, forward-inclined rollers, quick-change bearing rollers, hanging rollers, three-chain rollers, reversible rollers, variable groove angle rollers, and transitional rollers. Roller, V-shaped roller, etc.;
(2) Parallel rollers include ordinary rollers, comb rollers, forward-leaning rollers, steel rubber rollers, spiral rollers, etc;
(3) Self-aligning rollers include general-purpose, friction-reversible rollers, powerful rollers, tapered rollers, spiral rollers, combined rollers, etc.;
(4) Impact idlers include spring plate type idlers, buffer ring type idlers, strong buffer type idlers, adjustable elastic type idlers, hanging type idlers, etc.