Precision Steel Ball Bushing® bearings offer great improvements in efficiency, productivity and accuracy over high-friction plain bearings flat-ways. The all-steel design makes the bearing product line perfect for replacing plain bearings in high temperature applications. Rigid construction makes them very durable compared to ball bushing bearings with polymer components. When installed in a standard Thomson® pillow block, the Precision Steel Ball Bushing® bearing can self-align up to 3 deg in all directions. Thomson® Extra Precision Steel Ball Bushing® Linear Bearing, Closed, 3 in Shaft Dia, 4-1/2 in Outside Dia, 6 in Length, 2600 lb Dynamic, Steel Bearing, 500 °F