New Test for Mild Lubricated Wear in Rolling-Sliding Contacts

Abstract

A new test method for measuring and studying mild, lubricated wear is described. The test combines three important characteristics, (i) a mixed rolling-sliding contact to minimize contact geometry changes during a test; (ii) contra-rotating test specimen, to produce slide-roll ratios of greater than two, so as to enable high sliding speeds to be obtained while maintaining low entrainment speeds; and (iii) ICP-AES metal analysis to monitor very low levels of wear metals. The new wear test is applied to study the influence of ZDDP concentration on wear.

KEY WORDS:

• Wear Test
• Mild Wear
• ZDDP
• ICP-AES
• Slide-Roll Ratio

ACKNOWLEDGEMENT

The authors wish to acknowledge the financial support of RohMax that enabled this work to take place.

Presented at the STLE Annual Meeting Las Vegas, Nevada May 15-19, 2005

Review led by Cyril Migdal