Accession Number:

AD0676200

Title:

WEAR AND FRICTION STUDIES OF NEOPENTYL POLYOL ESTER LUBRICANTS,

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

Report Date:

1968-08-23

Pagination or Media Count:

29.0

Abstract:

Wear and friction properties of three representative neopentyl polyol esters, together with the common diester lubricant base, bis2-ethylhexylsebacate, were studied with the four-ball wear machine in the presence and in the absence of tricresyl phosphate. The rubbing surfaces were 440C stainless steel and 52100 steel. With 52100 low-chromium steel balls, wear rates were largely independent of ester structure and viscosity. Percolated tricresyl phosphate reduced wear moderately at low loads only. Stainless steel 440C gave results significantly different from those with 52100 steel at all loads. Wear was greatly increased at a load of 50 kg. Tricresyl phosphate was ineffective under all conditions. Friction showed little or no correlation with wear or the variables examined. Experiments with the as-received tricresyl phosphate additive failed to confirm the substantial difference between percolated and unpercolated tricresyl phosphate found at the Massachusetts Institute of Technology with a different test method in connection with the Navy gyro bearing program. Author

Subject Categories:

  • Lubricants and Hydraulic Fluids

Distribution Statement:

APPROVED FOR PUBLIC RELEASE