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Abstract
A new oil-testing machine using a steel ball running against three asymmetrically disposed pegs is described. The apparatus is in an oven so ambient temperatures up to 250 C can be achieved and also the wear tracks can be monitored during testing. The machine has been used to study how far the constant scuffing temperature hypothesis is obeyed. It has been shown that the EP agent used acts during the out-of-contact period. There was considerable difference whether the rotating or stationary member was made of active or unreactive steel. The constant failure temperature hypothesis was found to hold at low skin temperatures and where chemical reaction was prevented. When the EP additive was effective, the failure criterion changed from temperature to load. The addition of a surfactant would (under certain circumstances) completely prevent the EP additive from acting.
Presented as an American Society of Lubrication Engineers paper at the ASME/ASLE International Lubrication Conference held in New York City, October 9–12, 1972
Notes
Presented as an American Society of Lubrication Engineers paper at the ASME/ASLE International Lubrication Conference held in New York City, October 9–12, 1972
