The spring, usually a torsion spring or a multipiece helical design, applies constant radial pressure against the shaft, compensating for wear and minor misalignments to maintain a tight seal. Material Composition and Properties The sealing lip is almost exclusively constructed from nitrile rubber (NBR) due to its exceptional resistance to petroleum-based oils and fuels.
Oil Seal Material Options Comparison: Choosing the Right Compound for Your Application
Applications Across Industries The ubiquity of rotating and reciprocating machinery makes the oil seal indispensable across a vast array of sectors. For applications involving higher temperatures or exposure to aggressive chemicals, alternative materials like fluorocarbon (FKM), silicone (VMQ), or ethylene propylene diene monomer (EPDM) are utilized.
The metal housing, often made from steel or stainless steel, provides the necessary strength and ensures a precise fit within the bore. Dry running, where insufficient lubrication causes friction and heat buildup, is a primary cause of lip wear and hardening.
Oil Seal Material Options Comparison: NBR, FKM, Silicone, and More
Addressing these issues involves selecting the correct seal geometry, ensuring proper shaft preparation, and implementing adequate lubrication systems to maintain a stable fluid film between the lip and the shaft. At higher surface speeds, excessive friction can generate heat, leading to premature wear or failure, necessitating designs with optimized lip geometry.
More About Oil seal
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More perspective on Oil seal can make the topic easier to follow by connecting earlier points with a few simple takeaways.
