The Timken Company 418028 Radial Shaft Oil Seal

The Timken National 418028 radial shaft oil seal is designed to retain lubricants and keep contaminants out of rotating equipment such as industrial gearboxes, pumps, electric motors, conveyors, and compressors. Its Type 41, multi-lip, spring-loaded sealing element features nitrile (NBR) lips and a steel case with inner case, plus Redi-Coat for corrosion resistance, delivering reliable sealing in general-purpose industrial applications. Key dimensions and ratings include a shaft diameter of 3.250 in (82.550 mm), an outside diameter of 4.506 in (114.450 mm), a housing bore of 4.500 in (114.300 mm), and an overall width of 0.375 in (9.530 mm), with a maximum shaft surface speed of 3000 ft/min. The seal supports up to 7 psi, tolerates misalignment of 0.015 in at 800 rpm and 0.010 in at 4200 rpm, and operates from -40°F to 225°F (-40°C to 107°C), making it suitable for industrial machinery, manufacturing equipment, pumps, reducers, conveyors, and electric motors operating under normal industrial conditions. Common replacements include SKF 418028, CR 418028, and National 418028.