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Article
A Vacuum Four-Ball Tribometer to Evaluate Liquid Lubricants for Space Applications
Science and Mathematics Faculty Publications
  • Masabumi Masuko
  • William R Jones, Jr
  • Ralph Jansen
  • Ben Ebihara
  • Stephen V Pepper
  • Larry S Helmick, Cedarville University
Document Type
Technical Memorandum
Publication Date
7-1-1993
Keywords
  • Lubricants,
  • tribometer,
  • space
Abstract
The design and operation of a vacuum tribometer, based on the four-ball configuration, is described. This tribometer evaluates the tribological characteristics of liquid lubricants for space applications. Operating conditions include: room temperature, loads to approximately 1000N, speeds to approximately 500 rpm, and pressures of approximately 10(exp -6)Pa. Tests can also be run at atmospheric pressure with air or nitrogen. Some typical test results are included.
Citation Information
Helmick, L. S. (1994). A Vacuum Four-Ball Tribometer to Evaluate Liquid Lubricants for Space Applications. NASA Technical Memorandum (106264).