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The Evaluation of Some Threaded Inserts
Report Number: AFML TR 78-107
Author(s): Alton W. Brisbane
Corporate Author: Air Force Materials Laboratory
Laboratory: Air Force Materials Laboratory
Publication Date: 10/1/1979
Pages: 175
Contract: Laboratory Research - No Contract
Project: 2418
Task: 241807
AD Number: ADA085070
Abstract Text:
This report presents: (1) fatigue data for 7075-T73 aluminum alloy plate containing threaded inserts; (2) the results of tests for determining the tensile load required to pull threaded insert out of the parent material; (3) the torque required to lock and unlock a bolt threaded into the insert and; (4) the susceptibility of the insert to corrosion when threaded into the parent material and exposed to a corrosive media. The types of threaded inserts evaluated consisted of solid wall bushings, helical coils, and the solid wall self-tapping bushings.
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Performance Testing of Aged Grease-Lubricated Miniature Bearings
Report Number: AFML TR 78-110 Part 3
Author(s): J. L. Thompson; J. W. Harnach
Corporate Author: Amoco Oil Company
Publication Date: 2/1/1981
Pages: 74
Project: 0
Task: 0
AD Number: ADB058089
Photo Enhancement: Incomplete
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Acousto-Elastic Fastener Preload Indicator
Report Number: AFML TR 78-138
Author(s): J. C. Couchman
Corporate Author: General Dynamics
Laboratory: Aeronautical Systems Division
Publication Date: 10/1/1978
Pages: 101
Contract: F33615-76-C-5251
Project: None Given
Task: None Given
AD Number: ADB038409
Abstract Text:
This report describes the assembly, calibration, and testing of an acousto-elastic fastener preload indicator that has been demonstrated to preload fasteners with better than 5% accuracy within the elastic range. The system is computer automated and includes a calibration procedure for checking cutoff accuracy. The new capability afforded by this computer-controlled acousto- elastic torque wrench improves state-of-the-art capabilities by nearly an order of magnitude in accuracy for setting preloads and can be used on flaw-free fasteners of the flat-head type.
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This report is available for download via DTIC Online: (101 pages, 4 MB)
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