Accession Number : ADA309442

Title :   Fatigue Life of 120-mm Bore Ball Bearings at 600 deg F with Fluorocarbon, Polyphenyl Ether, and Synthetic Paraffinic Base Lubricants.

Descriptive Note : Technical note,

Corporate Author : GENERAL ELECTRIC CO CINCINNATI OH

Personal Author(s) : Bamberger, Eric N. ; Zaretsky, Erwin V. ; Anderson, William J.

PDF Url : ADA309442

Report Date : OCT 1968

Pagination or Media Count : 29

Abstract : Groups of 120-mm bore angular-contact ball bearings made from AISI M- 50 steel were fatigue tested at a temperature of 600 deg F (588 K) and a speed of 12 000 rpm with a synthetic paraffinic oil, a fluorocarbon, and a 5P4E polyphenyl ether. Under a low oxygen environment, the synthetic paraffinic oil and the fluorocarbon gave bearing lives approximately 14 and 3 times AFBMA-predicted (catalog) life, respectively. With the poly-phenly ether, bearing life was less than AFBMA-predicted (catalog) life in an air environment. For the synthetic paraffinic oil and the fluorocarbon, bearing fatigue was subsurface initiated. For the polyphenyl ether, bearing failure was mainly from surface distress, wear, and superficial pitting.

Descriptors :   *FATIGUE LIFE, *LUBRICANTS, *FLUORINATED HYDROCARBONS, *BORES, *BALL BEARINGS, ENVIRONMENTS, AIR, POLYMERS, FAILURE, SURFACES, OXYGEN, WEAR, ETHERS, FATIGUE, PHENYL RADICALS, SUBSURFACE, SYNTHETIC MATERIALS, PITTING.

Subject Categories : Machinery and Tools
      Organic Chemistry
      Polymer Chemistry
      Lubricants and Hydraulic Fluids
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE