Method. Tester is operated with one steel ball under load rotating against three steel balls held stationary in the form of a cradle. Rotating speed and temperatures were set. Then the subject steel ball was subjected to a series of tests having a duration of 10 seconds at increasing loads until welding (seizure) occurs.

Grease. Results. Load increased to 800 Kg (machine limit) with no weld.

Liquid/Oil. Results. Load increased to 800 Kg (machine limit) with no weld.

Comments. Scar surfaces were exceedingly smooth and clear of scoring. In the Test Director’s seven years of experience, this is a first in terms of performance. The test was conducted by the FALEX Corp, Aurora, Illinois.