American High Performance Seals

ROTARY SEALS

For oil and grease retention, no pressure or very low pressure up to 3psi (0.2bar)*

The primary function of oil seals, grease seals and bearing seals is to retain the bearing lubricant and, secondarily, to enhance the performance and life of the bearing by minimizing dirt, oil and water ingress that results in damage and premature failure of the bearing and other components.

Oil seals have a garter spring to provide a constant, uniform load of the seal lip on the rotating shaft. A spring-energized lip is required for best oil retention, but not typically for grease retention. Oil seals are widely used as bearing seals and as rotary shaft seals for fast rotary motion under no or very low pressures (max. 7 psi/0.5bar pressure spikes)*. Most oil, grease, and bearing seals with elastomeric seal lips are designed for zero pressure but will provide adequate service up to 3psi (0.2bar). Higher pressures will push the lip against the shaft and cause excessive friction and wear and rapid failure of the seal. For continuous pressures above 3psi (0.2bar)