Timken 55078S Radial Shaft Oil Seal NBR Lip With Spring

The Timken 55078S National 50000 Series radial shaft oil seal is a heavy-duty, spring-loaded single-lip seal (Type 5S) with an NBR lip and steel inner case designed to retain lubricant while excluding contaminants from rotating shaft systems. Its spring-loaded nitrile lip is paired with a steel inner case and Redi-Coat, and the unit weighs approximately 2.88 lb (1.31 kg). Dimensionally, the shaft ID is 9.750 in, the outside diameter is 11.260 in, the housing bore is 11.250 in, and the overall width is 0.750 in, with inch-based construction and solid lip design. It supports up to 3,000 ft/min shaft speed, operates from -40°F to 225°F (-40°C to 107°C), and offers misalignment tolerance of 0.015 in at 800 RPM and 0.010 in at 4,200 RPM; typical applications include industrial gearboxes, heavy-duty pumps, compressors, mining equipment, manufacturing machinery, and power transmission systems.