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Oil Seals, Lip Seals & Rotary Shaft Seals | Buy Online - Polymax UK

Oil Seals and Rotary Seals at Polymax

View Our Full Range of Oil Seals

Oil seals are commonly used in driveshafts, crankshafts and hydraulic cylinders where a rotating shaft is lubricated by oil or grease. The seal works like a cap, covering the clearance between the shaft and housing, stopping fluids from leaking whilst preventing containments from entering the chamber. If you are replacing a worn part because you have identified a leak, refer to your machinery handbook to find the type of oil seal you require. Whilst this is not always possible there are a few guidelines to help you get the right seal for the job, read our identify oil seals guide here.

Measurement: The inner diameter surrounding the rotating shaft is typically fitted with an energised sealing lip, or garter spring, which allows some give to prevent a build-up of friction. Meanwhile, the outer diameter must have a secure fit with the static housing or bore. Therefore, we recommend sizing the oil seal with a smaller inner diameter and wider outer diameter.

Design: Polymax oil seals are currently available in three designs: Type A (fully enclosed elastomer), Type B (partly enclosed elastomer) and Part C (partly enclosed, metal reinforced). Type A is fully enclosed with a rubber elastomer. Type B and C both have metal exposed on the top which allows for a tighter tolerance and Type C features an additional metal insert for heavy duty applications.

Other Considerations: Our comprehensive range of oil seals is available in Imperial or Metric sizes, single or double lips and Nitrile or Viton rubber materials.

To compare oil seal codes across 23 industry retailers please refer to our oil seal cross-reference document.

Can't find what you need? Contact one of our experts. Call +44 (0)1420 482862 or email sales@polymax.co.uk.


This oil seal is fully enclosed in a rubber material and is the most widely used type of oil seal. Great resistance to thermal cycling, temperatures and different chemical resistance.
This is an economical oil seal where the metal is exposed on one side and offers a closer fitting between the oil seal and housing or bore. Due to this, it has limited use with sealing thin liquids or gases.
The same design as type B with an additional metal insert for reinforcement. This type of oil seal is typically used in heavy duty engineering machinery or large diameter sized seals
The same design as type A with corrosion protected metal case and stainless-steel garter spring. Suitable for use with a wide range of fuels and chemicals.
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