Active standard | Published: 01/05/2025

SAE ARP6255A

Aviation Lubricant Tribology Evaluator (ALTE) Method to Determine the Lubricating Capability of Gas Turbine Lubricants

Available languages: English

Available design: electronic design (pdf), Print design

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Detail information

Designation: SAE ARP6255A

Publication date: 01/05/2025

Pages: 0

Country: American technical standard

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Anotation

Employing “ball-on-ring” philosophy, a nonrotating steel ball is held in a vertically mounted chuck and, using an applied load, is forced against an axially mounted steel rotating ring. The test ring is rotated at a fixed speed while being partially immersed in a lubricant reservoir. This maintains the ring in a wet condition and continuously transports a lubricating film of test fluid to the ball and ring interface. The diameter of the wear scar generated on the test ball is used as a measure of the fluid’s lubricating properties.

The apparatus can be used by adjusting the operating conditions to reproduce two different wear mechanisms. Therefore, the ALTE can assess a lubricant’s performance in that regard. These mechanisms are described below.

SUBFILE: Aerospace
TYPE OF DOCUMENT: Aerospace Standard

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