The Timken Company 8976S Radial Shaft Oil Seal

Description:

The Timken National 8976S oil seal is a premium single-lip radial shaft oil seal engineered to retain lubricants while preventing the ingress of dirt, dust, moisture, and other contaminants in rotating equipment. Manufactured from durable nitrile rubber, it provides reliable sealing performance for industrial, automotive, agricultural, and heavy-duty applications. Commonly installed in gearboxes, axles, wheel hubs, pumps, electric motors, and power transmission equipment, the National 8976S is widely used by maintenance teams, OEMs, and system integrators for equipment repairs, seal replacements, retrofit projects, and preventive maintenance to extend equipment life and minimize lubricant loss.

Applications:

The Timken National 8976S oil seal is designed for rotary shaft sealing applications where dependable lubricant retention and contaminant exclusion are critical. It is widely used in industrial gearboxes, heavy-duty axles, agricultural machinery, construction equipment, pumps, compressors, wheel-end assemblies, and general rotating machinery operating in demanding industrial environments.

Technical Specifications:

• Manufacturer Part Number (MPN): 8976S
• Manufacturer: Timken National
• Product Type: Oil Seal
• Seal Type: Radial Shaft Oil Seal
• Series: 8000 Series
• Seal Design: Type 49
• Material: Nitrile (Buna-N) Rubber
• Shaft Diameter: 3.125 in (79.38 mm)
• Housing Bore Diameter: 4.173 in (106.00 mm)
• Outside Diameter: 4.179 in (106.15 mm)
• Overall Width: 0.290 in (7.37 mm)
• Design Units: Inch (Imperial)
• Spring Loaded Lip: Yes
• Temperature Range: Suitable for standard nitrile seal operating temperatures
• Typical Applications: Industrial gearboxes, wheel hubs, axles, pumps, electric motors, agricultural equipment, construction machinery, and power transmission systems.

Common Replacements:

• SKF 8976S Oil Seal
• CR (SKF Chicago Rawhide) Equivalent Oil Seal
• Federal-Mogul/National 8976S Oil Seal