Rotary shaft seals

Rotary shaft seals provide sealing and wiping functionality for rotating and swivelling movements. They are commonly used to seal machine housings on protruding elements such as shafts or thrust rods. Their goal is to prevent leakage of lubricants or other fluids in the system while also preventing contamination from the outside.

Typical rotary shaft seals have two main components, the outer one is an elastomer encasement which seals statically. The inner part, which consists of a sealing lip, seals the moving shaft statically and dynamically.

We produce or procure rotary shaft seals which fit your application requirements in all possible dimensions and standards.

Minimum of 50 HRC on shaft, higher speeds generally require higher HRC.

Lip seals are also part of the rotary shaft seal segment, you can find them here; Our NT lip seals

Operating temperatures

Materialguide

  • Advantages:
    • Good swelling resistance to mineral oils, greases and diesel fuels.
    • Low gas diffusion.

    Disadvantages:
    • Insufficient weather and ozone resistance.
    • Requires special protective agents.
Advantages:
  • Excellent resistance to chemicals and mineral oils.
  • High heat resistance.
  • Lowest permeability rates for most gases.
Disadvantages:
  • Not resistant to polar solvents.
  • Shaft minimum 50 HRC 
Advantages:
  • High resistance to ozone, heat, hot water and alkaline and acidic solutions.
  • Resistant to polar solvents.
Disadvantages:
  • Not mineral oil resistant.
  • Shaft minimum 50 HRC 
Advantages
  • Pressure resistant to over 400 bar.
  • Hydrolysis resistant.
Disadvantages
  • Poorly suited for steam applications.
  • Shaft minimum 50 HRC 
Advantages
  • Good mineral and bio-oil resistance.
  • Suitable for applications with alcohol and water up to 90℃
Disadvantages
  • Not suitable for applications with steam, air over 100℃ and ozone.
  • Shaft minimum 50 HRC 
Advantages
  • Perfectly suited for abrasive and harsh environments.
  • Wear resistant.
Disadvantages
  • Low thermal resistances.
  • Water absorption.
  • Shaft minimum 50 HRC
Advantages
  • High chemical resistance.
  • Usable for many applications in pharmaceutical and food industries.
  • FDA approved.
Disadvantages
  • Prone to cold flow/creep.
  • Shaft minimum 50 HRC.
Advantages
  • High chemical resistance.
  • Usable for many applications in pharmaceutical and food industries.
  • Good thermal conductivity
Disadvantages
  • Abrasion particles can be visible as the material is anthracite coloured.
  • Shaft minimum 50 HRC.

Brochure

The brochure for this product can be downloaded here.

Download Area

Here you can find more information about our products and materials.

  • Certificate
  • Test instruction
  • Technical data sheets

Durability

This document gives you information about the storage time after receipt of the articles from NT K + D AG. It is also used for orientation and to avoid failures after installation.