IP 326: Determination of extreme pressure properties of grease - Timken method

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  • Method adopted/last revised: 2015
  • Method reapproved: None
  • REF/ISBN: IP326-2937259
  • Status: Current
  • First printed in STM books: February 2015


This standard describes a procedure for the determination of the load-carrying capacity of lubricating greases using a Timken Extreme Pressure Tester. It can be used to differentiate between greases having low, medium, or high levels of extreme pressure characteristics, however the results may not correlate with results from greases in service.

A procedure for calculating the contact (unit) pressure that exists between the cup and block at the conclusion of the test is given in annex C.

A procedures for the determination of friction is given in annex D and a procedure for the measurement of resistance to wear and/or abrasive properties is given in annex E.

Values are given in SI units and their Imperial equivalents are given in annex F.

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