Timken 21238-4371 is a large bore oil seal with a nitrile (NBR) single lip and garter spring. This hi-performance seal features a rubber-covered outer diameter for improved sealing in industrial applications. It is designed for shaft sealing in gearboxes, pumps, and heavy equipment, offering a standard operating temperature range of -40°F to +250°F.

TIMKEN 21238-4371 Large Bore Seal The TIMKEN 21238-4371 Large Bore Seal is an essential component designed to provide reliable sealing for various automotive and industrial applications. Engineered with precision and built to withstand rigorous operating conditions, this nitrile single lip seal ensures optimal performance and durability. ## Key Features • **Material Construction**: Made from high-quality NBR (Nitrile Butadiene Rubber), offering excellent resistance to oil, heat, and wear, ensuring longevity in demanding environments. • **Single Lip Design**: Features a single lip configuration with a garter spring, enhancing the sealing performance and allowing for effective retention of lubrication while preventing contaminants from entering. • **Bore Size**: Specifically designed for large bore applications, providing a tight fit and reliable sealing capability across various systems. • **Temperature Range**: Operates effectively within a temperature range of -30°F to 250°F (-34°C to 121°C), making it suitable for diverse operating conditions. • **Versatile Compatibility**: Ideal for use in automotive, aerospace, and industrial machinery applications, ensuring broad compatibility across multiple platforms. ## Applications • **Automotive**: Used in engines, transmissions, and differentials where robust sealing is required to maintain optimal performance and prevent leaks. • **Industrial Machinery**: Suitable for applications in hydraulic and pneumatic systems where reliability is critical, ensuring minimal downtime and maintenance costs. • **Aerospace**: Engineered to meet the stringent requirements of the aerospace industry, providing a secure seal in high-performance environments. ## Benefits • **Enhanced Reliability**: The durable construction and precise engineering of the seal provide peace of mind, reducing the risk of leakage and failure. • **Long-lasting Performance**: Designed to withstand harsh conditions, the TIMKEN 21238-4371 ensures extended service life and lower replacement frequency, ultimately saving costs. • **Improved Efficiency**: By preventing contamination and retaining lubrication, this seal enhances the efficiency of machinery and reduces operational friction. --- *Product information compiled with AI assistance for reference purposes.*