Rotary shaft seals as per drawing

For certain applications, industries may require non-standard profiles of rotary shaft seals. In such cases, Techné's engineering office offers its expertise and experience to develop new dedicated rotary shaft seal profiles for specific customer applications.

The engineering office's support may involve validation or recommendations, all the way to the complete development of a project, including product definition, drawings, numerical simulations, and prototype production.

As an initial approach, Techné's engineering office invites customers to fill out a design form. All necessary information, such as rotational speed, service temperature, contacting fluids, housing and shaft materials, will be analysed. A profile specific to the customer's requirements will be designed and proposed.

Access the form for custom parts

Example of a project

Pollution-proof rotary shaft seal for tractor wheels

  • The client provides details about the application and operating environment: pressure, speed, temperature, etc.
  • Selection of a mixture with optimized abrasion resistance
  • Definition of the shape of the rotary shaft seal, appropriate surface roughness, dimensions, and tolerances
  • Creation of the design plan
  • Prototype tool manufacturing
  • Design and manufacturing of a test bench
  • Endurance testing of the rotary shaft seal for 3 months in different fluids with regular checks
  • Presentation of test results to the client for final approval


Depending on the operating temperatures and chemical environment, Techné offers several materials for rotary shaft seals on request:

  • Metal reinforcement: steel or stainless steel (different grades upon request)
  • Elastomeric part:
    • NBR (Nitrile) rotary shaft seal
    • FKM (Fluorocarbon) rotary shaft seal
    • Silicone (VMQ) rotary shaft seal
    • EPDM rotary shaft seal
    • ACM/AEM (Polyacrylate) rotary shaft seal
  • Spring: steel or stainless steel (different grades upon request)

Pressure seals

Standard rotary shaft seals are designed for low-pressure rotational applications, sometimes even without pressure (maximum 0.5 bar). Specific rotary shaft seals are available for rotating systems requiring pressure seals:

  • An additional "L" support seal enhances the pressure capability up to 5 bar.
  • HP and HP10 rotary shaft seals: specific designs combining short sealing lips and reinforced metal reinforcements allow resistance for pressurized systems up to 3 bar for HP seals and 10 bar for HP10 seals.

For applications exceeding 10 bar, Techné's engineering office is at your disposal. → CTA to contact form

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Techné also offers surface coatings for rotary shaft seals.

Techné's surface coatings consist of a solid lubricant deposited on the seal surface with a thickness ranging from 5 to 35 microns. Most Techné coatings are based on PTFE, known for its excellent sliding properties. The Techné surface coating applied to rotary seals helps reduce friction between the sealing lip and the shaft, thus preventing premature wear of the shaft. Techné surface coatings are particularly effective in high-speed rotation applications.

Techné also provides surface coatings compliant with food applications.

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