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High-temperature greases for rolling bearings

Berger T.

International Journal of Applied Mechanics and Engineering

2002

Vol. 7, no 3

729-737

Today, the inherent limits of high-temperature rolling bearing greases based on ester oil and containing polyurea as thickener are becoming more and more apparent, and this trend will continue in the future. While for rolling bearings in the automotive industry lifetime lubrication has been mandatory for many years, other branches of the machine building sector are now also requesting long-term or even lifetime lubrication. The new product concept presented in this article is to close the gap between high-temperature greases for up to 180oC and the high-temperature greases based on perfluorinated polyethers and PTFE. Our experience so far has shown that these new greases are suitable for temperatures up to 220oC. Grease life tests on FAG FE 9 and SKF ROF test rigs have demonstrated the greases' high level of performance.