The Timken Company 5521 Oil Seal

Description:

The Timken National Oil Seal 5521 is a heavy-duty seal kit designed to retain lubricants while preventing dirt, dust, moisture, and other contaminants from entering rotating shaft systems. Featuring a spring-loaded multi-lip polyacrylate sealing element and a solid steel case with Redi-Coat protection, it provides dependable sealing performance in industrial gearboxes, pumps, electric motors, conveyors, agricultural equipment, and power transmission machinery. It is commonly used for equipment replacement, rebuilds, and preventive maintenance in demanding oil-lubricated applications.

Applications:

The Timken National Oil Seal 5521 is engineered for rotary shaft sealing applications requiring reliable lubricant retention and enhanced contaminant exclusion. Its Type 41 multi-lip design and polyacrylate sealing material make it suitable for industrial gearboxes, pumps, compressors, electric motors, conveyor systems, manufacturing equipment, and agricultural machinery operating at elevated temperatures and demanding service conditions.

Technical Specifications:

• Manufacturer Part Number (MPN): 5521
• Manufacturer: Timken
• Brand: National
• Product Type: Seal Kit
• Series: 5000 Series
• Seal Type: Type 41 Multi-Lip with Loaded Spring
• Material: Polyacrylate (ACM)
• Lip Material: Polyacrylate
• Case Material: Steel with Redi-Coat
• Measurement System: Inch
• Shaft Diameter (ID): 2.120 in (53.848 mm)
• Outside Diameter (OD): 3.505 in (89.027 mm)
• Housing Bore: 3.500 in (88.900 mm)
• Overall Width: 0.750 in (19.050 mm)
• Construction: Solid
• Lip Design: Multi-Lip with Spring
• Weight: Approximately 0.55 lb (0.25 kg)
• Typical Applications: Industrial Gearboxes, Pumps, Electric Motors, Compressors, Conveyors, Agricultural Equipment, Power Transmission Machinery.

Common Replacements:

• SKF Equivalent Multi-Lip Oil Seal
• CR (Chicago Rawhide) Equivalent Oil Seal
• National Type 41 Multi-Lip Oil Seal Kit