HANSA Press VKA-110 Operating Instructions Manual page 23

3.1.2 Standard short-time tests
Lubricants will usually be tested in 1-minute short-time tests.
Short-time tests allow you to test the lubricant fast and
 apply specific contact pressure which, e.g., is present at the mating teeth of gears
subjected to heavy wear;
 avoid damage to the test balls and clamping elements, e.g. a reduction in the parts'
hardness, as the overall heat produced is low.
To determine the wear curve, perform a series of short-time tests with the lubricant to be
tested at different loads applied to the ball cup.
 Select smaller load-increasing steps for lubricants with a low lubricity at high
pressure, e.g. 140, 160, 180, 200kg, etc.
 The load-increasing steps for lubricants with a higher lubricity at high pressure can
be bigger, e.g. 300, 350, 400, 450kg, etc.
Short-time tests produce results concerning the:
 PROGRESS OF THE WEAR CURVE
 FRICTION COEFFICIENT
 PROGRESS OF THE FRICTION COEFFICIENT
 WEAR AND TEAR DELAY TIME
 WELD POINT
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