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1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. TO PLACE A DOCUMENT ORDER; +01 724-776-4970 FAX: +01 724-776-0790 SAE WEB ADDRESS htt
3、p:/www.sae.org Copyright 2001 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 RECOMMENDED PRACTICE Submitted for recognition as an American National Standard J2133 REV. JUN2001 Issued1993-06 Revised2001-06
4、Superseding J2133 JUN1993 (R) Disc Wheel Radial Runout Low Point Marking 1.ScopeThis SAE Recommended Practice provides for standardized disc wheel radial runout low point marking. This marking is used for match-mounting tires on wheels to minimize assembly radial force variation. It applies to tubel
5、ess 15 degree drop center disc wheels for use on class 5, 6, 7, and 8 commercial vehicles. 2.References 2.1Related PublicationsThe following publications are provided for information purposes only and are not a required part of this document. 2.1.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth
6、 Drive, Warrendale, PA 15096-0001. SAE J179LabelingDisc Wheel and Demountable RimsTrucks SAE J393NomenclatureWheels, Hubs, and Rims for Commercial Vehicles 2.1.2ISO PUBLICATIONAvailable from ANSI, 11 West 42nd Street, New York, NY 10036-8002. ISO 3911Wheels/rimsNomenclature, designation and marking
7、3.Definitions 3.1Radial RunoutTotal indicator reading in the radial direction, taken at the rim bead seat, for one revolution, with the wheel located on the specified datum (see Figure 1, A and B). 3.2Lateral RunoutTotal indicator reading in the lateral direction, taken at the rim bead seat, for one
8、 revolution, with the wheels located on the specified datum (see Figure 2, A and B). 3.3DatumThe combination of physical features used to locate a wheel during runout measurement. 3.4Average Radial (Lateral) RunoutThe total indicator reading obtained by simultaneous averaging of both bead seat radia
9、l (lateral) runout signals (see Figures 1 and 2). 3.5First HarmonicThe magnitude of the sinusoidal component representing one cycle per revolution of a runout trace (see Figure 3). 3.6Low PointThe location on a wheel at which the minimum value of first harmonic of average radial runout occurs (see F
10、igure 3, “x”). SAE J2133 Revised JUN2001 -2- FIGURE 1AVERAGE RADIAL RUNOUT FIGURE 2AVERAGE LATERAL RUNOUT SAE J2133 Revised JUN2001 -3- FIGURE 3FIRST HARMONIC AND LOW POINT 4.Measurement Procedure and Equipment 4.1Datum Requirement 4.1.1Hub-piloted wheels shall use as datum features a disc mounting
11、face, and the wheel center-hole periphery. 4.1.2Stud-piloted wheels shall use as datum features a disc mounting face, and the stud-hole chamfers. 4.2The measuring device must be capable of collecting average radial runout data, and from the data, computing the first harmonic of average radial runout
12、, together with the low point. 4.3A maximum interval of three degrees wheel rotation between successive readings shall be maintained. 5.Marking 5.1RequirementThe wheel surface is to be legibly and permanently marked at the low point. 5.2FormatThe low point mark is to be of circular shape, with minim
13、um diameter of 3.0 mm (0.12 in) and minimum depth of 0.13 mm (0.005 in). 5.3PlacementThe mark is to be located on the rim weather side, in the area of the bead seat radius (see Figure 4). The marking must be placed on the tire-mounting side of the rim, with a duplicate mark optional on the side not
14、used for tire mounting. 5.4AccuracyThe location of the mark must meet the following tolerances with respect to the actual location of the low point (see Table 1): SAE J2133 Revised JUN2001 -4- FIGURE 4MARKING LOCATIONS TABLE 1ACCURACY REQUIREMENT First Harmonic of Average Radial RunoutMarking Locati
15、on Tolerance 0.13 mm (0.005 in) or less180 degrees greater than 0.13 mm (0.005 in) but less than 0.66 mm (0.025 in) 45 degrees greater than 0.66 mm (0.025 in)20 degrees SAE J2133 Revised JUN2001 -5- 6.Notes 6.1Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of th
16、e user in locating areas where technical 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. PREPARED BY THE SAE TRUCK AND BUS WHEEL SUBCOMMITTEE OF THE SAE TRUCK AND BUS CHASSIS COMMITTEE SAE J213
17、3 Revised JUN2001 RationaleThis SAE Recommended Practice was last revised in June 1993. The objective of this revision is to update the specification to current industry practice. Relationship of SAE Standard to ISO StandardNot applicable. ApplicationThis SAE Recommended Practice provides for standa
18、rdized disc wheel radial runout low point marking. This marking is used for match-mounting tires on wheels to minmize assembly radial force variation. It applies to tubeless 15 degree drop center disc wheels for use on class 5, 6, 7, and 8 commercial vehicles. Reference Section SAE J179LabelingDisc Wheel and Demountable RimsTrucks SAE J393NomenclatureWheels, Hubs, and Rims for Commercial Vehicles ISO 3911Wheels/rimsNomenclature, designation and marking Developed by the SAE Truck and Bus Wheel Subcommittee Sponsored by the SAE Truck and Bus Chassis Committee