4-Bolt Flange Housings

4-bolt flange housings offer a rugged, square mounting pattern that delivers extra stability for heavier loads and higher-vibration applications. Off Road Belts carries cast 4-bolt flange units designed to accept standard set-screw and eccentric-lock ball bearing inserts, supporting shafts on conveyors, fans, agricultural equipment, and industrial drive systems. Buy the housing on its own as a direct replacement, or combine it with the correct insert to assemble a complete mounted bearing unit. Shop our full selection of 4-bolt flange housings below with quality components ready to ship nationwide.