The idler is the main support of the conveyor belt. Ordinary roller, its structure is basically by the roller shaft, bearing, bearing, roller, labyrinth seal and shaft with a spring ring.
At present, the main use of deep groove radial ball bearings and tapered roller bearings. Deep groove radial ball bearing advantages:
(1) can be made large clearance, allowing the spindle to have a greater processing error and bending deformation;
(2) running resistance slightly lower than tapered roller bearings, the price is low.