Oil seals
Introduction
Oil seals are indispensable parts for sealing all types of equipment. They have a number of features such as simple structures, relatively low cost, and usability across a wide range of environmental conditions. Approx. 40 large and small oil seals are employed in automobiles.
■Basic Construction
An oil seal consists of three parts: a synthetic rubber part, a metal ring, and a spring.
■Basic Construction
| Shape | Type | Application | JIS B 2402 | JASO F 401 | ISO 6194 |
|---|---|---|---|---|---|
 |
SC SB | For oil, no dust | Type 1, Type 2 | S SM | TYPE1 TYPE2 |
 |
TC TB | For oil, with dust | Type 4, Type 5 | D DM | TYPE3 TYPE4 |
 |
VC VB | For grease, no dust | (G) (GM) | G GM | |
 |
KC KB | For grease, with dust | P PM |
Note:
JIS: Japanese Industrial Standards
JASO: Japanese Automotive Standards Organization
ISO: International Organization for Standardization