Effect of Bearing Defects

Abstract

This program determined the relationship between selected raceway surface defects and performance and life of miniature ball bearing. The first phase of this two phase program developed the test plan for utilization in the second phase test and evaluation effort. Nine defect types were tested at various levels: Comet-Tail, Dig-Nick, Dirt Brinell, Grind-Skip Lines, Impingement, Orange Peel, Pit, Scratch and 'Liney' Finish. Bearing selected was 5/16 OD x 1/8 ID (MPB P/N S518MCK) in tolerance grades ABEC 1, ABEC 3, and ABEC 7P. Performance tests included starting torque, low speed running torque and vibration. Life tests utilized air driven turbine test rigs operating at 16,000 rpm with 2 lbs. axial load. Bearings were lubricated with KG-80 oil (MIL-L- 83176). Conclusions are that performance characteristics were influenced to a greater degree than were bearing life times. A specification for defect limitation is presented based on performance and life test times. A specification for defect limitation is presented based on performance and life test evaluation.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1974
Accession Number
ADB006930

Entities

People

  • Colby G. Beecher

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Data Science
  • Fabrication
  • Geometry
  • Information Science
  • Life Tests
  • Manufacturing
  • Materials
  • Measurement
  • Measuring Instruments
  • New Hampshire
  • Performance Tests
  • Plastic Explosives
  • Test And Evaluation
  • Test Equipment
  • Test Methods

Fields of Study

  • Engineering

Readers

  • Aerospace Test and Evaluation
  • Materials Science and Engineering.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).