The Timken Company 455192 Single Lip Oil Seal

The Timken 455192 National Oil Seal is a nitrile (NBR) single-lip oil seal with a spring, housed in a steel case with inner case to retain lubricants and block dirt, moisture, and other contaminants from entering rotating shaft systems. It is designed for demanding industrial service and is commonly used in gearboxes, pumps, electric motors, conveyors, manufacturing equipment, mining machinery, and power transmission systems to protect bearings and lubricated components. This 450000-series seal features inch-based dimensions: shaft diameter 4.000 in (101.60 mm); outside diameter 5.256 in (133.50 mm); housing bore 5.251 in (133.38 mm); width 0.468 in (11.89 mm). It supports a maximum shaft surface speed of 3000 ft/min, with misalignment tolerance of 0.015 in at 800 rpm and 0.010 in at 4200 rpm, and a pressure rating of 7 psi. Continuous operating temperature ranges from -40°F to 225°F (-40°C to 107°C). Common replacements include SKF 39997 and the Chicago Rawhide equivalent, with National’s 450000-series oil seals serving as direct alternatives. The part carries MPN 455192, is manufactured by Timken, and is offered under the National brand as a Type 45 design with a nitrile lip for reliable sealing in demanding environments.