Friction and wear in thrust ball bearings lubricated with biodegradable greases

Author:

Cousseau T1,Graça B1,Campos A2,Seabra J3

Affiliation:

1. Instituto de Engenharia Mecânica e Gestão Industrial – INEGI, Porto, Portugal

2. Instituto Superior de Engenharia do Instituto Politécnico do Porto – ISEP–IPP, Porto, Portugal

3. Faculdade de Engenharia da Universidade do Porto – FEUP, Porto, Portugal

Abstract

Thrust ball bearings lubricated with several different types of grease, including three biodegradable low-toxicity greases, were tested in a modified four-ball machine in order to evaluate the bearing friction torque. At the end of each test, grease samples were obtained and analysed through ferrography, allowing the quantification and evaluation of the bearing wear. In order to compare the grease performance in terms of friction and wear, a correlation between the grease characteristics (base oil, bleed oil, thickener structure, and rheological parameters) and the experimental results was established.

Publisher

SAGE Publications

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering

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