SKF
Rubber Seating Rings
Rubber seating rings are elastomeric o-rings or shaped gaskets that fit between the bearing insert’s sphered outer surface and the housing bore, providing enhanced sealing and vibration damping. SKF offers them in nitrile and fluoroelastomer materials for different temperature and chemical exposures. They prevent fretting corrosion between the bearing outer ring and housing, cushion impact loads, and further block contaminant ingress. Used in conjunction with integral bearing seals, rubber seating rings significantly improve the sealing system’s effectiveness, especially where housings are subject to pressure washdown or high-moisture environments. Easy to fit during unit assembly or bearing replacement, they are a cost-effective upgrade for a wide range of mounted applications.
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Improved Seal Barrier
Secondary seal between bearing and housing.
Fretting Prevention
Dampens micro-motion that causes corrosion.
Shock Absorption
Elastomer cushions impact loads.
Noise Reduction
Reduces metal-to-metal vibration transmission.
Broad Chemical Compatibility
Nitrile for general use; fluoroelastomer for aggressive chemicals and heat.
Simple Retrofit
Fits standard SKF housing bores during bearing replacement.
How Rubber Seating Rings Extend Housing and Bearing Life
In vibrating screens or crushers, the housing bore and bearing outer ring can fret against each other, creating metal debris that contaminates the grease. A seating ring prevents this movement, protecting both components and maintaining interference fit.
Material Selection for Seating Rings
Nitrile rubber suits -40°C to +100°C and resists mineral oils. Fluoroelastomer (FKM) handles up to +200°C and resists a wider range of chemicals, making it ideal for chemical, pharmaceutical, and high-temperature applications. SKF provides both materials.