NDLI: Rds-21 face-gear surface durability tests

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Rds-21 face-gear surface durability tests

Content Provider	NASA Technical Reports Server (NTRS)
Author	Lewicki, David G. Slaughter, Stephen C. Heath, Gregory F. Filler, Robert R. Fetty, Jason
Copyright Year	2007
Description	Experimental fatigue tests were performed to determine the surface durability life of a face gear in mesh with a tapered spur involute pinion. Twenty-four sets of gears were tested at three load levels: 7200, 8185, and 9075 lb-in face gear torque, and 2190 to 3280 rpm face gear speed. The gears were carburized and ground, shot-peened and vibro-honed, and made from VIM-VAR Pyrowear 53 steel per AMS 6308. The tests produced 17 gear tooth spalling failures and 7 suspensions. For all the failed sets, spalling occurred on at least one tooth of all the pinions. In some cases, the spalling initiated a crack in the pinion teeth which progressed to tooth fracture. Also, spalling occurred on some face gear teeth. The AGMA endurance allowable stress for a tapered spur involute pinion in mesh with a face gear was determined to be 275 ksi for the material tested. For the application of a tapered spur involute pinion in mesh with a face gear, proper face gear shim controlled the desired gear tooth contact pattern while proper pinion shim was an effective way of adjusting backlash without severely affecting the contact pattern.
File Size	3049115
Page Count	16
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20070034728
Archival Resource Key	ark:/13960/t9c58kh1p
Language	English
Publisher Date	2007-09-01
Access Restriction	Open
Subject Keyword	Mechanical Engineering Fatigue Tests Test Facilities Gear Teeth Spiral Bevel Gears H-60 Helicopter Fatigue Materials Spalling Durability Shot Peening Rotary Wing Aircraft Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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