Advantages of Silicone and Rubber Gaskets

Fundamental things and its importance
The pulley is kept from turning on the crankshaft by a key fitting into grooves on the crankshaft and pulley.
Leather is probably the oldest of the lip materials still in common use, but the move towards mass production methods has seen a massive increase in the development of synthetic rubbers which lend themselves to accurate and repeatable injection and compression moulding. Nitrile (NBR) is still by far the most common elastomer for “normal” use, whilst Viton® (FKM/FPM) is rapidly replacing Polyacrylate (ACM) and Silicone (VMQ) for high-temperature applications. Viton® also has high resistance to abrasion and chemical attack making it a preferred elastomer. Recent developments in the use of PTFE for Rotary shaft seals has caused widespread interest particularly for high-speed shaft rotation or poor lubrication applications.

tc type oil seal. Additionally, TC type oil seals are easy to install and remove, making maintenance and replacement a simple process.
Lift off the cloth, making sure no debris falls into the valve gear.