A pressed-steel pulley and a Timken ® precision ball bearing with rubber seals are combined to make a self-contained unit
Two pulley designs are available One for V-belts and another for the backs of V-belts Both are made for A, B, C and D section belts
A chain idler, identical in construction to the flat idler, is available, with the addition of an assembled rubber tire (part number A-10927) The rubber tire cushions the chain, preventing undue wear on the pulley surface or chain
Idler pulley units feature a Timken® single-row radial ball bearing with an inner ring extended on both sides, this provides clearance for abutting parts and greater support on the shaft
Contact-type rubber seals help ensure positive retention for lubricant and full protection against dirt, dust and foreign matter
All units are non-relubricatable Special features include smoothly rolled-over edges, eliminating belt chafing and scuffing The weep holes on the rivet circle allow water drainage when the pulley is mounted in a horizontal position