Fig. 6.6.1. General view of an unpowered roller conveyor
Parts of unpowered roller conveyor
(i) Rollers: Cylindrical rollers are generally used which are made from ERW steel pipes with cast or fabricated end flanges to accommodate the antifriction bearings (usually ball bearings). The through axles are stationary and roller barrels can rotate freely. These rollers are called idler rollers.
For conveying cylindrical objects (drums, pipes, round steel bars etc.), double tapered rollers or wheel rollers are used (Fig. 6.6.2).