Micropitting and pitting are fatigue failures that occur on casecarburized gears. The performance of lubricants in regard tomicropitting and pitting can be evaluated by test methods. TheFVA-FZG-micropitting test consists of two parts: a load stage testfollowed by an endurance test. The tests require relatively highcosts and are time consuming. Therefore an analogous short testmethod was developed to classify candidate lubricants, andsupplement the existing test. The results of the short test methodare given. The FVA-FZG-pitting test is for limited-life using testgears, which are ground without controlled profile or helixmodifications. Although the flank roughness is restricted, theappearance of micropitting can cause a wide statistical spread ofpitting test life. Thus, there was potential improvement in thetest results reproducibility. In the test gears were superfinishedto prevent micropitting, and given flank modifications for improvedtest relevance. The paper describes test procedures and shows basicexamples of test results.
- Edition:
- 06
- Published:
- 10/01/2006
- Number of Pages:
- 13
- File Size:
- 1 file , 420 KB
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