The following options are available here:
- Directly
Direct specification, e.g. from measurement or experience.
- from test conditions
Calculates the scuffing temperature based on the maximum flash temperature, tooth temperature and the sweat factor. The calculation is based on test results with low-alloy mineral oils. Due to the empirically determined welding factor, the equation can be applied to further steel grades, heat treatments and surface treatments.
- for non-antiscuff mineral oils
Also referred to as "R&O" after AGMA 9005-E02.
For mineral oils with a low concentration of anti scuffing additives, the scuffing temperature can be assumed to be independent of the operating conditions.
The equations used here represent approximations determined for mineral oils and steels from IAE and FZG tests.
- for antiscuff mineral oils
Also referred to as "EP gear oil" after AGMA 9005-E02.
The equations used here represent approximations determined for mineral oils and steels from IAE and FZG tests.
In contrast to calculations according to DIN or ISO, the probability of occurrence is included in AGMA 925-A03 in addition to the scuffing temperature (= theoretical limit for the occurrence of scuffing damage).
This is done by including statistics in the form of Gaussian normal distribution. AGMA 925-A03 uses a standard deviation of 15 %.
Source: AGMA 925-A03, Section 6.5.1 and Section 6.5.3