WEAR AND FRICTION STUDIES OF NEOPENTYL POLYOL ESTER LUBRICANTS,
Abstract
Wear and friction properties of three representative neopentyl polyol esters, together with the common diester lubricant base, bis(2-ethylhexyl)sebacate, 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 23, 1968
- Accession Number
- AD0676200
Entities
People
- J. M. Hall
- R. C. Bowers
Organizations
- United States Naval Research Laboratory