One of the key benefits of metric self-drilling screws is their versatility. They can be used on a wide range of materials, from thin sheet metal to thicker substrates like wood or composite materials. The hardness and coating of the screw are tailored to suit different materials, ensuring optimal performance and longevity The hardness and coating of the screw are tailored to suit different materials, ensuring optimal performance and longevity
These types are made with a metal outer case and a PTFE lip. They are suitable for a wide range of temperatures from -90 °C to +260 °C.These lip seals can also be used for higher pressures of up to 10 bar (special types up to 25 bar) and rotational speeds of up to 40-45 m/s. Certain grades of PTFE are suitable for use in pharmaceutical and food applications. One important point is that PTFE lip seals do require a shaft with a harder, smoother finish.
To ensure correct fit and proper protection against contaminants, the inside diameter of an oil seal must be slightly smaller than the shaft diameter.
What are Oil Seals and the different types?

Cassette seals are designed to maximise grease or oil retention and protection against liquid or solid contaminants. These seals are provided with their own bushings in which dirt is kept out and oil/grease kept in by a multi-lip seal.
Oil seals play a vital role in the efficient operation of machinery and equipment by preventing the leakage of oil or other fluids. One commonly used type of oil seal is the 65x90x10 oil seal, which is designed to fit a specific shaft size of 65mm, an outer diameter of 90mm, and a thickness of 10mm. These seals are typically made from rubber or other flexible materials that can withstand the harsh conditions often found in machinery.

Double metal cased

