Downloaded from https://www.everyspec.com MIL-STD-1312B APPENDIX C ALIGNMENT.. AND LOAD VERIFICATION OF AXIAL-LOAD FATIGUE TESTING MACHINES 10. SCOPE ,- 10.1 l’bisprocedure covers the techniques and equipment.to be used to verify proper machine and fixture alignment and cyclic-load application for axial-load fatigue testing mxchines. Examples of typical fixturea are included. 10.2 General Procedure. The general procedure for alignment and load verification of axial-load fatigue testing mxchinea consists of the following steps: i. a. Select proper equipment for static alignment. b. Check calibration of equipment. c. Check machine alignment and make adjustments as required. d.
Select proper equipment for dynamic load verification and install in test ruacbine. e. Apply static loads and verify. f. Operate machine dynamically, record indicated loads, and compute amplitude and maximum load errors. 20.
APPLICABLE DOCUMENTS MIL-S-8879 Screw Threads, Controlled Radius Root with Increased Minor Diameter, General Specifi- cation for MIL-C-15074 Corrosion Preventive, Fingerprint Remover AMS 6280 Steel Bars, Forgings, and Rings, 0.50 Cr 0.55 Ni 0.20 Mo (0,28-0.33 C) (SAE 8630) I AMS 6304 Steel Bars, Forgings, and Tubing, Low Alloy Heat Resistant 0.95 Cr - 0.55 Mo - 0.3V (0.40-0.50 c) AMS 6485 Steel, 5 Cr - 1.3 Mo - 0.5V (0.38-0.43 C) AMS 6487 Steel Bars and Forgings,,5 Cr - 1.3 0.5V (0.38-0.43 C) Premium Quality, Consumable Electrode Vacuum Melted Mo - ASTM E4 Verification of Testing Machines 7