Accession Number : AD0780453

Title :   Progression of Surface Damage in Rolling Contact Fatigue.

Descriptive Note : Final rept. May 73-Apr 74,

Corporate Author : SKF INDUSTRIES INC KING OF PRUSSIA PA RESEARCH LAB

Personal Author(s) : Dalal,H. ; Cotellesse,G. ; Morrison,F. ; Ninos,N.

Report Date : FEB 1974

Pagination or Media Count : 67

Abstract : Deep groove 6309 ball bearings were tested under heavy load in MIL-L-23699 lubricant using an ultraclean closed loop recirculating lubrication system in which the only metallic wearing component was the test bearing. A limited amount of Ferrographic analysis on the oil samples obtained from these tests has not established a definite correlation between Ferrogram readings and bearing failure progression. The discrimination of the Shock Pulse Analyzer (MEPA) to differentiate between a failed and non-failed bearing was confirmed. The shock value increased from 500 or less on a running bearing to 1000 or more on a failed bearing. (Modified author abstract)

Descriptors :   *Antifriction bearings, *Monitoring, Nondestructive testing, Fatigue(Mechanics), Friction, Roll, Monitors, Damage, Pulse analyzers, Wear, Detection, Surfaces, Failure, Spallation, Defects(Materials), Test equipment

Subject Categories : Machinery and Tools
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE