Accession Number : AD0787849

Title :   Performance of Lubricant Compact Materials in Ball Bearings.

Descriptive Note : Technical rept. 2 Jan-15 Apr 74,

Corporate Author : MIDWEST RESEARCH INST KANSAS CITY MO

Personal Author(s) : Mecklenburg,Karl R.

Report Date : SEP 1974

Pagination or Media Count : 46

Abstract : Operational data on six lubricant compact materials, installed in nine ball bearings, are presented. The compact materials are MoS2-Mo-Ta, MoS2-Mo-Nb-Cu, WS2-Co-Ag and MoS2-Ta. The formation process is outlined. A description of the test rigs used in the work is presented. The two basic types of ball bearing test specimens are described, as are the two ball separator designs. The compact inserts were either cylindrical or conical and were installed in either aluminum or titanium separators. The operating life results are presented, with the compact materials classified as either 'early failure' or 'prolonged operation.' Weight loss data are presented, from which wear rate data were calculated. Frictional torque measurements are included, as are the vacuum levels in the test chambers. Operational wear lives were predicted for the five bearings still operating, using a conservative quantity of available compact material and the calculated wear rates. Conclusions relative to the compact materials and bearing performance are included. (Modified author abstract)

Descriptors :   *Lubricants, *Ball bearings, Test methods, Performance(Engineering), Molybdenum compounds, Tungsten compounds, Sulfides, Molybdenum, Tantalum, Niobium, Copper, Cobalt, Silver, Compacting, Wear resistance, Friction

Subject Categories : Lubricants and Hydraulic Fluids
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE