Rheological and Physical Studies of Lubricating Greases Before and After Use in Bearings

[+] Author and Article Information
Rémy Mas, Albert Magnin

Laboratoire de Rhéologie Domains Universitaire, BP53, 38041 Grenoble, Cedex 9, France; Université Joseph Fourier, Grenoble 1, Institut, Polytechnique de Grenoble, associated with the C.N.R.S. (URA 1510)

J. Tribol 118(3), 681-686 (Jul 01, 1996) (6 pages) doi:10.1115/1.2831592 History: Received June 29, 1994; Revised October 05, 1995; Online January 24, 2008


Lithium soap and calcium complex soap-based lubricating greases are studied when fresh and after use in roller and ball bearings. Examination of the rheological properties of these greases using rotating rheometers reveals changes that have occurred during use in the bearings. These modifications are not uniform throughout the hearing. Physical and chemical analyses enable these modifications in rheological properties to be linked to variations in composition or structure, depending on the type of grease and bearing. Several mechanisms involved in lubricating a bearing with a lubricating grease are confirmed or clarified.

Copyright © 1996 by The American Society of Mechanical Engineers
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