- Conclusion
Figure 2 Overall, the 40mm rubber gasket is a versatile and reliable sealing solution that is widely used in various industries for different applications. Its ability to provide a tight seal, resist high temperatures and pressure, and dampen vibrations makes it a valuable component in ensuring the efficiency and reliability of industrial equipment and machinery. Whether in plumbing systems, automotive engines, or hydraulic systems, the 40mm rubber gasket plays a crucial role in maintaining operational efficiency and preventing costly leaks or contamination.
Rubber type
PTFE Oil Seals - A relatively new and exciting oil seal, the use of polytetrafluoroethylene means that they can withstand dry or unlubricated operations. With a massive thermal range of -130ºC to +200ºC and a strong resistance to chemicals, they are considered to be the future of rotary shaft seals.


Rubber type
Other important factors are ensuring the hardness and roughness of the shaft are correct. A shaft hardness of HRC 45 is recommended for a rubber sealing lip, with a roughness of Ra 0.4-0.8. A higher shaft hardness of HRC 60 and shaft roughness of Ra 0.1-0.4 is recommended for a PTFE lip.
Put a wooden block or a piece of large tube against the seal and gently tap it squarely into the housing until it is fully home. Refit the timing cover, if removed.
Oil seals made of HNBR are characterised by excellent properties that include high resistance to mineral oils with additives, low steam and gas permeability, good cold flexibility down to -30 °C depending on type, good ozone resistance and friction resistance. HNBR seals withstand heat up to 150°C.
* KOYO is a registered trademark of JTEKT.
Helix Seal