Oscillating Rolling Wear Test Bench (SNR-FEB2)
In the false brinelling test rig, the wear protection behavior of lubricating greases in rolling bearings is tested, which are only operated with small swivel angles.
The best known is the SNR-FEB2 test which is required, for example, for greases in the pitch bearings of wind turbines (swing angle +/- 3°). KTM has also developed a laboratory standard test that can be used to simulate bearings that are subjected to only very small swiveling movements or even vibrations (+/- 0.5°).
The bearings are weighed before and after the test. In addition, the wear marks in the barrel rings are inspected and measured.
The test rig at KTM also allows tests with liquid lubricants. Tapered roller bearings can also be tested using an adapter. In addition, the test bearings can be cooled down to low temperatures with a cooling unit.
| Test bench parameters | ||
| Axial force | 100 to 8,000 N | |
| Test duration | 1 min; 6 min; 1.3 h; SNR test 50 h | |
| Oscillation frequency | Stepless 1 to 40 Hz (standard 25 Hz) | |
| Oscillation angle | 0.2 to +/-3° (SNR standard +/- 3°; KTM standard +/- 0.5°) | |
| Temperature | -20 to 80°C (standard RT) | |
| Test bearing | Thrust ball bearing type 51206 , KRL optional | |
| Test duration | 1 min, 6 min, 1.3 h, SNR test 50 h |
Detail sketch false brinelling
The adjacent bidl shows a typical standstill marking with the inner, unchanged adhesion zone. The damage occurs in the areas with microslip. Here, unsuitable lubricants quickly cause massive damage as a result of adhesion and disruption.
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