Timken 5538 Oil Seal

The Timken National 5538 oil seal is a rugged radial shaft seal engineered to retain lubricant and block contaminants in rotating equipment such as industrial gearboxes, pumps, electric motors, conveyors, and compressors. Its Type 41 multi-lip nitrile design with a spring minimizes oil leakage and helps extend bearing life. Key dimensions include a shaft diameter of 6.875 in (174.625 mm), outside diameter of 8.382 in (212.903 mm), housing bore of 8.375 in (212.725 mm), and an overall width of 0.750 in (19.050 mm). The seal resides in a steel case with an inner case and is Redi-Coat ready for efficient installation. It is rated for a maximum shaft surface speed of 3000 ft/min and an operating temperature range from -40°F to 225°F (-40°C to 107°C). The part number is 5538, belonging to Series 410000, with a lip configuration of multi-lip with spring and lip material of nitrile (NBR). Common replacements include SKF 5538, CR 5538, and National 5538. This seal is suitable for general-purpose industrial shaft sealing applications, providing reliable oil containment while excluding dirt, dust, and moisture in industrial machinery, manufacturing equipment, pumps, reducers, conveyors, and electric motors under normal industrial conditions.