- Another advantage of the CMR5H spark plug is its longevity. Made from high-quality materials, this spark plug is designed to last for a long time, providing reliable performance mile after mile. This not only helps to save you money on frequent spark plug replacements but also ensures that your engine continues to perform at its best.
What are Oil Seals?
Modern engine concepts, like higher engine speeds and oil temperatures, longer intervals between oil changes and lubricants with modern additives, require new solutions for dynamic seals. They have to withstand the high loads lastingly. PTFE technology is the answer, since it perfectly meets these demands.
Examples of defects
Silicone rubber (VMQ)


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.
Oil seals are called rotary shaft seal or radial lip also.

14x24x6 oil seal. They are designed to withstand high temperatures and pressures, as well as the friction and heat generated by rotating shafts.
Table 4: JTEKT oil seal type codes and corresponding ISO and JIS standards
For more guidance and details regarding oil seals, contact Robco of America. Their professionals always help you with your gasket, bearing, and seal needs.
Rotary Wheel Of Auto Parts
Unthinkable in the list of seals are oil seals, which provide a seal against splashing oil. The most important oil seals are used for rotating shafts and valve stem seals. Oil seals are intentionally never completely sealed to lubricate the seals and prevent wear.
If the seal is being fitted to original equipment you may have some influence over the shaft and housing bore finish, but if you are replacing a worn seal you still need to take into account the condition of these 2 essential parts. Check for sharp edges and burrs – particularly on the shaft and housing chamfers or you could ruin the seal before you start up. If the shaft is too worn consider using an M Barnwell Services Shaft Repair Kit.

