Elastomeric seals

The primary function of these components is to seal on the shaft and prevent external ingress of lubricating oil and grease, either by sealing between the outer diameter of the seal and its housing, or by sealing between the shaft and main sealing lip. A key consideration is that the radial load exerted by the sealing lip is sufficient for lubricant retention, but not high enough to cause excessive friction and wear. The correct profile and material to achieve this balance depends on the application.