Medium oil resistance (Class C) with heat resistance up to 120°C (Class C).
Primarily used for its superior oil resistance.
This article provides an in-depth look at the standard, covering its scope, classification systems, and where to find the documentation. What is JIS K 6380?
If you are looking for a PDF of the standard or technical datasheets based on it, you can refer to the following sources: jis k 6380 pdf
Finding an official, paid copy of (original Japanese or English translation) isn’t as simple as Googling a free PDF. JIS standards are copyrighted by the Japanese Standards Association (JSA) . While you might stumble upon scanned older editions (e.g., 1995 or 2004 revisions) on engineering forums, for professional use you should purchase the latest version via:
: The permanent deformation remaining after a material has been compressed [5.13]. Aging Properties
Industrial seals encounter vastly different environments. JIS K 6380 categorizes materials to match these diverse operational demands: Medium oil resistance (Class C) with heat resistance
Specialized for extreme temperature stability and electrical insulation.
Letters are added to indicate resistance levels, such as heat aging or oil resistance (e.g., in accordance with oil resistance test methods in JIS K 6258). Key Performance Indicators in JIS K 6380
: Use a standardized cutter (die) to punch out the required shape from a flat rubber sheet. For tensile tests, this is usually a No. 3 or No. 5 dumb-bell shape. What is JIS K 6380
A numeric value indicating the Durometer (typically Shore A) hardness required for the seal.
To be classified under JIS K 6380, rubber materials must undergo a series of standardized tests to verify that their physical properties meet the required specification for their designated class. These test methods are defined in other JIS standards, which are integral to the JIS K 6380 framework. Key tests include:
Evaluates how physical properties change over time at high temperatures. JIS K 6258
The standard breaks materials into types: