Radial shaft seals

An oil seal normally consists of three basic components: the sealing element, the metal housing and the spring. The purpose of the sealing element is to prevent fluid from leaking between the shaft and the housing. The metal housing will give rigidity and strength to the retainer while it is held in the bore or recessed groove. The spring ensures constant pressure and maintains radial force to the shaft, flattening the sealing edge to a defined width. The spring maintains the radial force exerted by the sealing lip around the shaft surface. All materials should be selected based on the environment in which the seal will operate.

The distinctive elements of a checkpoint are:

  • Elastomer-coated or uncoated metal body. Versions with exposed metal housing are supplied with ground and calibrated outer surface.
  • There are seals that replace the metal casing with a reinforced fabric heel cup and allow the design of split seals.
  • Normally, the elastomer membrane has a spring on the vertical of the sealing edge to maintain the shaft sealing, either in operation or at standstill.
  • Optional “dust lip” for protection against dust and dirt from the outside.

Radial shaft seals must, in addition to ensuring good sealing, meet other requirements such as:

  • Reliability.
  • Long duration.
  • Simple assembly.
  • Chemical resistance to the working fluid.
  • Low friction.


We offer this product of our represented brand CORTECO.

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