The Timken Company 5408 Radial Shaft Oil Seal Kit

Description:

The Timken National Oil Seal 5408 is a heavy-duty radial shaft oil seal kit designed to retain lubricants while preventing dirt, moisture, and other contaminants from entering rotating shaft systems. Manufactured with a nitrile (NBR) sealing element and supplied with wear sleeve and gaskets, it is intended for demanding industrial and heavy-duty axle applications. It is commonly used in industrial gearboxes, heavy-duty trucks, construction equipment, mining machinery, and power transmission systems for equipment replacement, rebuilds, and preventive maintenance.

Applications:

The Timken National Oil Seal 5408 is designed for large-bore rotary shaft sealing where reliable lubricant retention and contaminant exclusion are essential. Its spring-loaded single-lip design makes it suitable for heavy-duty truck wheel ends, industrial gearboxes, axle assemblies, construction equipment, mining machinery, and other oil-lubricated rotating equipment operating in harsh environments.

Technical Specifications:

• Manufacturer Part Number (MPN): 5408
• Manufacturer: Timken
• Brand: National
• Product Type: Oil Seal Kit
• Seal Type: Spring-Loaded Single Lip
• Material: Nitrile (NBR)
• Lip Material: Nitrile Rubber (NBR)
• Measurement System: Inch
• Shaft Diameter (ID): 3.124 in (79.350 mm)
• Outside Diameter (OD): 8.250 in (209.550 mm)
• Overall Width: 0.518 in (13.160 mm)
• Operating Temperature: -40°F to 225°F (-40°C to 107°C)
• Construction: Steel Case
• Contains: (1) Oil Seal, (1) Wear Sleeve, (2) Gaskets (G40 & G42)
• Typical Applications: Heavy-Duty Truck Axles, Industrial Gearboxes, Mining Equipment, Construction Machinery, Power Transmission Equipment.

Common Replacements:

• SKF Equivalent Heavy-Duty Oil Seal
• CR (Chicago Rawhide) Equivalent Oil Seal
• National Large Bore Oil Seal Kit