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Race-Tec Sealing Ltd Engine
Transmission Seals


High performance PTFE lined transmission seals for superior operation in high temperature applications. Custom designed to your requirements.

• Typical Surface Speed: 76m.s-1
• Max Operating Temperature: 230ºC
• Pressure Range: -0.86 to +5 Bar(g)
• Fluid Compatibility: Any
• Lip Configuration: Custom Designed

Race-Tec High performance transmission seals use a PTFE (Teflon®) element which chemically bonded to the elastomer sealing lip. Our hybrid PL technology offers a more flexible solution to cope with high-speed shaft dynamics and shaft lobbing that can occurs during acceleration and braking.

Race-Tec Transmission seals are designed to press fit into transmission casting, however, where space is premium the seals can be bonded directly to complex housings using exotic materials to save space and weight. The lip design can be optimised using different grades of elastomer and PTFE to suit the specific requirements of the application such as shaft wear, temperature & oil viscosity.

For classes running OEM transmissions, where permitted, we can supply a higher performance alternative seal, whether it be a PTFE lined seal or an optimised elastomer lip seal. In many cases frictional and weight benefits can be achieved.

The reliability and performance of our engine seals has enabled to be in the position where our products are used in engines ranging from high performance F1, Nascar and Le Mans, through all forms of motorsport to smaller engines of Kart and Scooter racing.

  • Typical Applications
  • Performance Data
  • Shaft Machining Criteria

Input Seal
Output Seals
Pinion Yoke
Tail End
Starter Shaft

Need Help with an application?

"Seal Specification Sheet"
Download our Seal Specification Sheet


Superior Performance Seals to suit your application.

Typical Surface Speed: 76m.s-1
Max Operating Temperature: 230ºC

Pressure Range: -0.86 to +5 Bar (g)
>400 watts at 10000 Rpm
Ultra Low shaft wear 3-5µm TYP

Roughness: Ra = 0.20-0.43 µm
Rz = 1.65-2.90 µm
Rpm = 0.50-1.25 µm
Hardness:45-60 HRC
Finish:Plunge grinding with 80 grit wheel
Shaft Lead <0±0.05º
Allow to spark out
Do not traverse the grinding wheel
Do not use Conical wheels
Grinding chatter:None allowed > 45 cycles (lobes)
(OOR) Out of Roundness:< 0.0050 mm at a max of 2 lobes
< 0.0025 mm at a max of 7 lobes

Contact our experienced team for advice and support
Tel: +44 (0)23 8024 6986 Fax: +44 (0)23 8025 8986 Email: rtsales@rolwey.com
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