SAE J1992 pdf download

SAE J1992 pdf download.(R) Wheels/Rims—Military Vehicles—Test Procedures and Performance Requirements.
1. This SAE Recommended Practae provides minimum performance requirements and uniform laboratory procedures for fatigue testing of disc wheels. dernour*able rims, and bolt-together wheels intended for normal highway use on military trucks, buses, truck-trailers, and multipurpose vehicles. For wheels and rims intended for normal highway use by Wuck5, see SAE J267. For wheels intended for normal highway use by passenger cars, light trucks, and multipurpose vehicles, see SAE J328 For wheels used on trailers drawn by passenger cars, light trucks, or multipurpose vehicles, see SAE J1204 This document does not cover off- highway or other special application wheels and rims
2. RelWrences
2.1 Applicable Publications—The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest version of SAE publications shall apply.
2.1.1 SAE PusucATloNs—Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001
SAE J267—WheelsiRs—Trucks—Test Procedure and Performance Req uwements
SAE J328—Wheels—-Passenger Cars—Performance Requirements and Test Procedures
SAE J393—Nomenclature—eels, Hubs, and Rims for Commercial Vehicles
SAE J1204—Wheels—Recreat,onal and Utility Trailer Test Procedure
2.1.2 TIRE AND Rai ASSOCiATION PuBUCATION—Ava,lable from The Tire and Rim Association, Inc. 175 Montrose West Avenue, Suite 150, Copley, OH 44321.
Yearbook, The Tire and Rim Association, Inc.
2.2 ReLated Publications—The following publications are provided for information purposes only and are not a required pt of this document.
2,2.1 SAE PueucATIoN—Avaitable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J1982—Wheels for Passenger Cars. Light Trucks, and Multipurpose Vehicles
2.2.2 ISO PueucertoNs—Available from ANSI. 11 West 42nd Street. New York. NY 10036-8002.
ISO 3006—Road vehicles—Passenger car wheels—Test Methods
ISO 3894—Road vehicles—Commercial vehicles—Wheelsirims—Test methods
ISO 3911 —Wheelsftims-—Nomenclature, designation, marking and units of measurement
5.2 Procedure
a. Select test tires that are representative of the maximum size and type approved by the vehIe or wheel manufacturer for the wheel under test.
b. Use a test adapter. studs. and nuts (and damps for demountable nms) that are representative of those specified for the wheel/rim.
c. Mount and inflate the tre fo 448 kPa ± 14 kPa (65 psi ± 2 psi) for ties with usage pressure of 310 kPa (45 psi) or loss For wheels and tires intended for use at higher pressures. use 1.2 times the usage pressure, but not less than 448 kPa * 14 kPa (65 psi ±2 psi).
d. Tighten the nuts to the torque specified in Appendix A for the stud size and type of nut. Torque shall be checked and reset penodically dunng the course of a test in order to compensate for the wearing in of mating surfaces.
e. There may be an increase in inflation pressure during the test. This is normal, but it is permissible to adjust back to the test pressure.
5.3 Radial Test Loading
a. Radial Load Determinahon—The radial load is determied as follows:
where:
R radial load. N (tf)
S = accelerated test factor. See Table 2.
b. For minimum cycle life, see Table 2
5.4 Test Wheels—Use only fully processed new wheels/rims which are representative of wheels/rims intended for the vohde and ready for road use New wheels/rims and new related components of multi-piece rims will be used for each test. All tests (or bo.together divided wheels must be run using a complete assembly with the fasteners torqued per manufactixer’s reconimendation
5.5 Test Criteria/Test Termination—The wheel under test must complete the mwbimum number of test cycles prior to test termination. The test shall b. terminated by: the inability of the wheel to sustain load, andior a visually detected fatigue crack penetrating tiwough a section. and/or a broken wheel clamp bolt separated froni the wheel assembly. Failure of the test tire, broken studs or other parts of the test hxture do not require test termination but may result ii damage to the wheel and test invabdation.
6, Notes
6.1 Marginal Indicla—The change bar (I) located wi the left margin is for the convenience of the user m locating areas where tedmical revisions have been made to the previous issue of the report An (R) symbol to the left of the document title indicates a complete revision of the report.