Tests were conducted at 350 K (170 deg F) with groups of 8.9 cm (3.5-in.)-pitch-diameter spur gear with and without tip relief made of consumable-electrode vacuum melted (CVM) Super Nitralloy (5Ni-2Al) and CVM AISI M-50 steel. The AISI M-50 gears without tip relief had lives approximately 50 percent longer than the Super Nitralloy gears without tip relief. However, the Super Nitralloy gears with tip relief had lives equal to the AISI M-50 gears without tip relief. The difference in lives were not statistically significant. All gears failed by classical pitting fatigue at the pitch circle. However, the AISI M-50 gears with tip relief failed by tooth fracture. AISI M-50 gear sets without tip relief having a spalled gear tooth which were deliberately overrun after spalling had occurred, failed by tooth fracture.
Skip Nav Destination
Article navigation
October 1974
This article was originally published in
Journal of Lubrication Technology
Research Papers
A Life Study of AISI M-50 and Super Nitralloy Spur Gears With and Without Tip Relief
D. P. Townsend,
D. P. Townsend
Lewis Research Center, National Aeronautical and Space Administration, Cleveland, Ohio
Search for other works by this author on:
E. V. Zaretsky
E. V. Zaretsky
Lewis Research Center, National Aeronautical and Space Administration, Cleveland, Ohio
Search for other works by this author on:
D. P. Townsend
Lewis Research Center, National Aeronautical and Space Administration, Cleveland, Ohio
E. V. Zaretsky
Lewis Research Center, National Aeronautical and Space Administration, Cleveland, Ohio
J. of Lubrication Tech. Oct 1974, 96(4): 583-589 (7 pages)
Published Online: October 1, 1974
Article history
Received:
July 13, 1973
Online:
October 18, 2010
Connected Content
Citation
Townsend, D. P., and Zaretsky, E. V. (October 1, 1974). "A Life Study of AISI M-50 and Super Nitralloy Spur Gears With and Without Tip Relief." ASME. J. of Lubrication Tech. October 1974; 96(4): 583–589. https://doi.org/10.1115/1.3452501
Download citation file:
Get Email Alerts
Cited By
Related Articles
A Life Study of Ausforged, Standard Forged, and Standard Machined AISI M-50 Spur Gears
J. of Lubrication Tech (July,1976)
Effect of Rim Thickness on Gear Crack Propagation Path
J. Mech. Des (March,1997)
Increased Surface Fatigue Lives of Spur Gears by Application of a Coating
J. Mech. Des (November,2004)
Vibration of High-Speed Spur Gear Webs
J. Vib. Acoust (July,1998)
Related Proceedings Papers
Related Chapters
Introduction and Definitions
Handbook on Stiffness & Damping in Mechanical Design
Understanding the Problem
Design and Application of the Worm Gear
Backlash
Design and Application of the Worm Gear