Seals are classified by O.D. wall material, lip type, and whether they have a spring or not.
Major oil seals are specified in ISO 6194-1 and JIS B 2402-1.
Table 2 shows the common types of oil seals, while Table 3 shows the features of each type of oil seal.
Table 4 lists the JTEKT oil seal type codes and corresponding ISO and JIS standards.
Oil seals normally consist of three basic components: the sealing element, the metal case, and garter spring.
GVST
Selecting Quality Car Engine Head Gaskets and Automotive Rubber Gaskets
LED (Light Emitting Diode)
This is almost similar to that of ‘A’ type seal. But this has the metal case placed outside. When the housing is rough, temperature is high and working conditions are severe, this type is preferred
The spark plug ignition coil works by converting the low voltage electricity from the battery into a much higher voltage that is capable of creating a spark across the spark plug gap. This high voltage is delivered to the spark plug through the ignition coil wire, which is connected to the secondary winding of the ignition coil.

One of the key features of the 75x100x10 oil seal is its durability and resistance to wear and tear. Made from high-quality materials such as rubber, metal, and fabric, this oil seal can withstand high temperatures, pressure, and friction without losing its sealing capabilities. This makes it a long-lasting solution for machinery that operates in demanding environments.
oil seal 75x100x10

ERIKS type M (type B according to the DIN standard) has a single metal casing and rubber sealing lip. Since the casing is made of metal, it must be fitted in a well-finished, undamaged groove. Large volumes of oil seals with metal casings are often cheaper, which is why they are often used as original equipment in machines. However, if an oil seal has to be replaced, types with a rubber exterior (type R or RST) are easier to fit. Type MST is similar to M and commonly used. The difference is the dust lip in the MST oil seal that prevents dust and dirt reaching the sealing lip, and extends its service life in dusty environments.