Timken® Type E tapered roller bearing housed units feature double-lip seals and locking collars that protect against water and other contaminants. This double-lip seal design blocks debris and retains grease better than single-lip or triple-lip seals, according to Timken® 2012 laboratory tests. Its cast-iron exterior includes a corrosion-resistant electro-coat finish for the housing and collar, a more durable shield than industry-standard powder coating or black oxide. Set screws with nylon patches reduce back-out, even in rigorous applications. Premium Timken® tapered roller bearings inside Type E housings are manufactured with advanced technology that results in longer predicted useful bearing life than other housed units with standard bearings. Designed with optimized bearing profiles and improved surface finishes, Timken® tapered roller bearings operate efficiently within the housing. Timken® Tapered Roller Bearing Unit, Flange Type E, 3 in Bore, 6 in Bolt Center-to-Center Length, 3/4 in Diameter Bolt Circle, 4-Bolt Square Flange Mounting, 7-3/4 in Overall Length/Diameter, 4-1/2 in Overall Depth, 7-3/4 in Overall Height, Set Screw Locking Device, 12300 lb Dynamic/61200 lb Static Load, 2060 RPM Maximum, -30 to 180 °F, Uncoated