Assessing friction characteristics of liquid lubricants

Hargreaves, Douglas J. & Tang, John C. H. (2006) Assessing friction characteristics of liquid lubricants. Tribotest, 12(4), pp. 309-319.

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A reduction in friction in tribological contacts will lead to reduced energy requirements. It is therefore important to be able to measure the frictional characteristics of various liquid lubricants. Current laboratory tests measure friction, but the test rigs invariably induce wear between the mating contacts. A new test rig, the wire-on-capstan rig, is presented which measures friction without inducing wear between the wire and the rotating capstan. All seven lubricants tested (three without additives and four proprietary hydraulic oils) exhibit a reducing coefficient of friction with increasing temperature. Temperatures ranged from 25 degrees Celsius to 100 degrees Celsius. The mineral-based oil showed the lowest friction coefficient and the three synthetic ester based oils produced the highest friction coefficient over the complete temperature range. Future testing will extend the range of operating conditions and product types.

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ID Code: 10831
Item Type: Journal Article
Refereed: Yes
Keywords: friction, liquid lubricants, tribology
DOI: 10.1002/tt.27
ISSN: 1557-685X
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Mechanical Engineering not elsewhere classified (091399)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2006 John Wiley & Sons
Copyright Statement: The definite version is available on publication at
Deposited On: 21 Nov 2007 00:00
Last Modified: 29 Feb 2012 13:23

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