Timken 21086-3749 is a large bore, hi-performance oil seal with a single lip and garter spring. Constructed from NBR (nitrile) material for a standard operating temperature range of -40°F to +250°F, it features a rubber-covered outer diameter for improved sealing. This design is suitable for heavy-duty industrial applications requiring reliable shaft sealing in gearboxes, pumps, and large machinery.

# Large Bore Seal The TIMKEN 21086-3749 Large Bore Seal is an essential component designed to provide robust sealing solutions for various industrial applications. Constructed from high-quality NBR (Buna-N) nitrile material, this single lip seal features a garter spring that enhances its sealing performance, ensuring optimal protection against contaminants and maintaining lubrication integrity within the system. ## Key Features • **Material Composition:** Crafted from premium NBR (Buna-N) nitrile, offering excellent resistance to oil and abrasion. • **Design:** Single lip design with a garter spring that ensures effective sealing under dynamic conditions. • **Temperature Range:** Operates efficiently in a wide temperature range, typically from -30°F to 250°F (-34°C to 121°C), accommodating various industrial environments. • **Pressure Rating:** Designed to withstand moderate pressures, making it suitable for a variety of applications where reliability is crucial. • **Dimensions:** Engineered to fit large bore applications, ensuring a snug and secure fit for enhanced performance. ## Applications • **Industrial Machinery:** Ideal for use in heavy-duty machinery where effective sealing is critical to prevent fluid leakage and contamination. • **Automotive Components:** Suitable for automotive applications, providing reliable sealing solutions in engine systems and transmission components. • **Aerospace:** Can be utilized in aerospace applications where precision and reliability are paramount. • **Energy Sector:** Effective in sealing applications within the energy sector, including oil and gas industries. ## Benefits • **Enhanced Reliability:** The robust construction and innovative design contribute to long-lasting performance, minimizing maintenance downtime. • **Improved Efficiency:** By preventing leaks, the seal helps maintain system efficiency, reducing operational costs. • **Versatile Compatibility:** Compatible with a wide range of applications, making it a versatile choice for various industries. --- *Product information compiled with AI assistance for reference purposes.*