Evaluation of Carburized and Ground Face Gears

Abstract

Experimental durability tests were performed on carburized and ground AISI 9310 steel face gears. The tests were in support of a Defense Advanced Research Projects Agency (DARPA) Technology Reinvestment Program (TRP) to enhance face-gear technology. The tests were conducted in the NASA Glenn spiral-bevel-gear/face-gear test facility. Tests were run at 2300 rpm face gear speed and at loads of 64, 76, 88, 100, and 112-percent of the design torque of 377 N-m (3340 in-lb). The carburized and ground face gears demonstrated the required durability when run for ten-million cycles at each of the applied loads. Proper installation was critical for the successful operation of the spur pinions and face gears. A large amount of backlash produced tooth contact patterns that approached the inner-diameter edge of the face-gear tooth. Low backlash produced tooth contact patterns that approached the outer-diameter edge of the face-gear tooth. Measured backlashes in the range of 0.178 to 0.254 mm (0.007 to 0.010 in) produced acceptable tooth contact patterns.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1999
Accession Number
ADA368600

Entities

People

  • David G. Lewicki
  • Gregory F. Heath
  • Robert F. Handschuh
  • Vijay Sheth

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Databases
  • Diameters
  • Failure Mode And Effect Analysis
  • Frequency
  • Gear Teeth
  • Gears
  • Geometry
  • Helicopters
  • Manufacturing
  • Measurement
  • Military Research
  • Resilience
  • Space Sciences
  • Spiral Bevel Gears
  • Standards
  • Test And Evaluation
  • Test Facilities

Readers

  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).