Abstract
Within the framework of the DGMK Research Project 377-02 the influence of the age of the lubricant on toothed gear wear was studied. Five mineral oils and five synthetic oils in new condition and in two different stages of practical aging in the FZG wear test C/0.05/90:120/12 under conditions of mixed and boundary friction were studied. The test lubricants were products used in vehicles, industrial gears, and hydraulics. The mineral oils exhibited in new condition mainly higher wear than in the two aged stages. With the exception of a diesel motor oil the synthetic oils in new and in aged condition showed only slight wear. A worsening in wear behavior as a result of the aging was not determined for any of the test lubricants. A correlation of the changes in the characteristic viscosity and neutralization number and characteristic bands in the IR spectrum with the changed wear behavior was not found. The studies indicate that in practice the most important finding is that in the aging of a lubricant as a rule no impairment of the slow running wear load capacity is to be feared. The discussion covers introduction; test methods and test lubricants; results of earlier studies; results of the wear studies; and conclusions.
Translated title of the contribution | From practice and research. Change in the wear behavior of toothed gears in service limited oil changes |
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Original language | German |
Pages (from-to) | 29-33 |
Number of pages | 5 |
Journal | Tribologie & Schmierungstechnik |
Volume | 49 |
Issue number | 4 |
State | Published - 2002 |