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 entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, 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.QUESTIONS REGARDING THIS DOCUMENT: (412) 772-8512 FAX: (412) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (412) 776-4970 FAX: (412) 776-0790Copyright 1997 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICEJ751REV.APR97Issued 1951-01Revised 1997-04Superseded by J751 APR86(R) OFF-ROAD TIRE AN
4、D RIM CLASSIFICATIONCONSTRUCTION MACHINESForewordTechnological advances in construction machine designs and applications have necessitated theinception of numerous special size and design tires. The proliferation of old and new terminology requiresorganized expression. Specific size, capacity, and o
5、ther application information should be obtained through tireand rim manufacturers and their organizations.1. ScopeThis SAE Recommended Practice describes the classification of off-road tires and rims for use onconstruction machines (see SAE J1116), defines related terminology in common use, and show
6、srepresentative construction details of component parts.1.1 PurposeTo establish a standard nomenclature for tire classification and tire and rim components.2. References2.1 Applicable PublicationsThe following publications form a part of this specification to the extent specifiedherein. Unless other
7、wise indicated, the latest issue of SAE publications shall apply.2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J1015Ton-Kilometer Per Hour Test ProcedureSAE J1098Ton-Kilometer Per Hour ApplicationSAE J1116Categories of Off-Road Self-Propelled Work Ma
8、chines2.2 Related PublicationsThe following publications are provided for information purposes only and are not arequired part of this document.2.2.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J1057Identification Terminology of Earthmoving MachinesSAE J
9、1440Off-Road Tire and Rim ClassificationForestry Machines2.2.2 ISO PUBLICATIONSAvailable from ANSI, 11 West 42nd Street, New York, NY 10036-8002.ISO 3877-1:1978Tyres, valves and tubesList of equivalent termsPart 1: TyresISO 4223-1:1989Definition of some terms used in the tyre industryPart 1: Pneumat
10、ic tyresISO 4250-1Earthmover tyre and rimsPart 1: Tyre designations and dimensionsISO 4250-2Earthmover tyre and rimsPart 2: Loads and inflation pressuresCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J751 Revised APR97-2-ISO 4250-3Earthmover tyre and rims
11、RimsISO 6165:1987Earthmoving machineryBasic typesVocabulary3. Definitions3.1 Tire DefinitionAn off-road tire size created before 1988 will be designated by an alphanumeric sequence: asection width reference, construction indicator, rim diameter designation, a carcass strength rating, and aservice co
12、de (for example: 27.00-49 42 PR E-4). For tire sizes created in 1988 or after, the tire will also bedesignated by an alphanumeric sequence: nominal section with reference, aspect ratio, nominal rim diameterdesignator, a carcass strength rating, and a service code (for example: 48/95R57 * E-4; or met
13、ric 525/80R25* E-2/E-3).3.1.1 SECTION WIDTH REFERENCEThere are three commonly accepted designations: conventional, wide base,and low aspect ratio. These designations are based upon the tire aspect ratio (i.e., section height divided bysection width). Note that section width reference is not a tire d
14、imension.3.1.1.1 ConventionalThere are two groups of tires designated as conventional.3.1.1.1.1 The section width reference includes zeros following the decimal point for tires created before 1988 (forexample: 24.00); for tire sizes created from 1988 to date, the section width reference is a two-dig
15、itnumber with no decimal point (for example: 48). The aspect ratio for these tires is approximately 0.96.3.1.1.1.2 There is a limited group of large-diameter tires created before 1988 that fit on single piece drop centerrims. The section width reference for these tires is a two-digit number with no
16、decimal point (forexample: 27). These tires have equivalents in 3.1.1.1.1 in external dimensions and load carry capacity.3.1.1.2 Wide BaseFor tires created before 1988, the section width reference includes digits other than zerofollowing the decimal point and the aspect ratio is approximately 0.83 (
17、for example: 29.5). For tires createdin 1988 or after, the tire will be designated by an alphanumeric sequence: nominal section width reference,aspect ratio, nominal rim diameter designator, a carcass strength rating, and a service code. (Forexample: 50/80-57 68 PR L-4.)3.1.1.3 Low AspectFor tires c
18、reated before 1988, the section width reference is followed by the aspect ratio andseparated by a slash (for example: 41.25/70, 40/65). Some older tires of 0.65 aspect ratio may have theorder reversed (for example: 65/40). For tires created in 1988 or after, see 3.1.1.2.3.2 ConstructionThere are two
19、 basic tire constructions: bias ply and radial. See Figure 1.3.2.1 BIAS PLYA bias ply constructed tire is designated by a hyphen (-) after the section width reference (forexample: 24.00-) for tires created before 1988 and by a hyphen (-) after the aspect ratio for tires created in1988 or after (for
20、example: 50/80-).3.2.2 RADIALA radial constructed tire is designated by an upper case R after the section width reference oraspect ratio (for example: 24.00R, 50/80R).COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J751 Revised APR97-3-FIGURE 1NOMENCLATURE
21、 FOR OFF-ROAD TIRES3.3 Rim Diameter DesignationThe rim designation follows the section width reference or aspect ratio andconstruction indicator and specifies the appropriate diameter rim (for example: 24.00-49, 24.00R49, 48/95R57).3.4 Carcass Strength RatingCarcass strength is identified by two met
22、hods: ply rating (PR) bias tires and asymbol mark type of rating (star *) for radial tires. Ply rating is an index of tire strength and does notnecessarily represent the number or cord plies in a tire. For the meaning of symbols on symbol marked tires,refer to the respective tire manufacturer.COPYRI
23、GHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J751 Revised APR97-4-3.5 Service CodeService code is an alphanumeric identification for off-road tires in terms of type of tire intendedservice and tire-tread. The identification consists of a letter designating se
24、rvice category, followed by anumeral indicating the tread. The recommended code identification is given in Table 1.3.5.1 A COMPACTOR TIRECategory C can be defined as: A tire utilizing a wide, smooth tread surface for smoothroad work and a button design for compaction in loose soils. The tires are lo
25、ad capacity rated for operation,basically up to 10 km/h.TABLE 1RECOMMENDED CODE IDENTIFICATION FOR OFF-ROAD TIRES(TUBE OR TUBELESS TYPES)Category Tread Type Code Number(1)1. Dual designation tires can also be used. (For example: E-3/L-3)CCompactor Service Smooth C-1Grooved C-2EEarthmover Service Rib
26、 Regular E-1Traction Regular E-2Rock Regular E-3Rock DeepTread E-4Flotation E-7GGrader Service Rib Regular G-1Traction Regular G-2Rock Regular G-3Rock DeepTread G-4LLoader and Dozer Service Traction Regular L-2Rock Regular L-3Rock DeepTread L-4Rock ExtraDeepTread L-5Smooth Regular L-3SSmoothDeepTrea
27、d L-4SSmoothExtraDeepTread L-5SHalf TrackRegularTread L-3/L-3SHalf TrackDeepTread L-4/L-4SHalf TrackExtra DeepTread L-5/L-5SCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J751 Revised APR97-5-3.5.2 AN EARTHMOVER TIRECategory E can be defined as: A tire de
28、signed for haulage machines at medium tohigher speeds. These tires are load capacity rated for short haul operation, up to 4 km (2.5 miles) one way atspeeds up to both 50 km/h (30 mph) and 65 km/h (40 mph). They are also rated for TKPH (ton-kilometer perhour) and TMPH (ton-mile per hour) capacity (S
29、AE J1015 and SAE J1098).3.5.3 A GRADER TIRECategory G can be defined as: A tire which is generally provided with both a rib-type treadfor resistance to lateral forces caused by blade and by turning, and with a lug-type tread having superiortraction and self-cleaning abilities for operation in both s
30、oft soils and rugged terrains. These tires are loadcapacity rated for operations up to 40 km/h (25 mph).3.5.4 A LOADER AND DOZER TIRECategory L can be defined as: A thick, heavy tread and sidewall tire formaximum protection against cutting. These tires are load capacity rated for operation up to 10
31、km/h.3.6 Load IndexA numerical code associated with the maximum load a tire can carry at the speed indicated byits Speed Symbol under service conditions specified by the tire manufacturer.(188E - 188 = 10,000 kgs therefore, consult rim manufacturers for propermatching and assembly instructions.7.2.1
32、 RIM BASE MARKINGThe rim base marking consists of a prefix letter B, denoting a rim base, followed by 2digits denoting rim width, 2 digits denoting rim diameter, and one or more numbers or letters denoting rimtype or style designation. In cases where the rim design width contains decimal fractions,
33、the decimalportion is deleted from the rim marking. The rim type or style designation indicates certain design details orfeatures of the rim assembly, and does not relate to the tire to rim contour. The use and meaning of the suffixletters and numbers is at the discretion of the rim manufacturer. EX
34、AMPLEB1751 HDTDB1533 EMCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J751 Revised APR97-8-7.2.2 BEAD SEAT BAND MARKINGThe bead seat band marking consists of prefix letters BB, and two or threedigits, followed by one or more letters. The BB denotes bead s
35、eat band. The latter two digits denote nominalrim diameter. Where a third digit is present, it denotes the bead taper width to the smallest whole inch. Thesuffix letters denote type or style designations.EXAMPLEBB35 HTGBB25 STNBB425 EMOBB539 EH7.2.3 FLANGE MARKINGThe flange marking consists of a pre
36、fix letter, usually S or H, followed by four digits. Theprefix letter denotes flange. The first two digits denote flange height to the nearest tenth of an inch, and thelast two digits denote nominal rim diameter. Suffix letters, when shown, denote type or style.EXAMPLEH5051S3535 ES4049 HS7.2.4 LOCK
37、RING MARKINGThe lock ring marking consists of letters LR, denoting lock ring, followed by two digitsdenoting the nominal rim diameter, and one or more letters denoting type or style.EXAMPLELR29 HTMLR49 EML7.2.5 O-RING MARKINGThe O-ring marking consists of the prefix letters OR, followed by three dig
38、its and one ormore letters. The prefix letters denote O-ring. The first digit indicates cross section diameter in eighths of aninch. The latter two digits denote nominal rim diameter. The suffix letters denote type or style.EXAMPLEOR329EMOR457 T8. Rim and Wheel NomenclatureRefer to Figure 4.COPYRIGH
39、T Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J751 Revised APR97-9-FIGURE 4ARIM AND WHEEL NOMENCLATURE COMMON TO LARGEOR GIANT HEAVY SERVICE TIRESCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J751 Revised APR97-10-FI
40、GURE 4BRIM AND WHEEL NOMENCLATURE COMMON TO LARGEOR GIANT HEAVY SERVICE TIRESCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J751 Revised APR97-11-9. Notes9.1 Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of the user
41、in locatingareas where technical revisions have been made to the previous issue of the report. An (R) symbol to the leftof the document title indicates a complete revision of the report.PREPARED BY THE SAE MACHINE TECHNICAL COMMITTEE SC8TIRE AND RIMCOPYRIGHT Society of Automotive Engineers, Inc.Lice
42、nsed by Information Handling ServicesSAE J751 Revised APR97RationaleThe SAE J751 document was in need of the required review per the SAE 5-year updaterequirement and to be written in the new SAE format. Basically, there are not many changes, but thedocument does contain the information required per
43、the new format.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThis SAE Recommended Practice describes the classification of off-road tires and rims for useon construction machines (see SAE J1116), defines related terminology in common use, and showsrepresentative construction
44、details of component parts.Reference SectionSAE J1015Ton-Kilometer Per Hour Test ProcedureSAE J1057Identification Terminology of Earthmoving MachinesSAE J1098Ton-Kilometer Per Hour ApplicationSAE J1116Categories of Off-Road Self-Propelled Work MachinesSAE J1440Off-Road Tire and Rim ClassificationFor
45、estry MachinesISO 3877-1:1978Tyres, valves and tubesList of equivalent termsPart 1: TyresISO 4223-1:1989Definition of some terms used in the tyre industryPart 1: Pneumatic tyresISO 4250-1Earthmover tyre and rimsPart 1: Tyre designations and dimensionsISO 4250-2Earthmover tyre and rimsPart 2: Loads and inflation pressuresISO 4250-3Earthmover tyre and rimsRimsISO 6165:1987Earthmoving machineryBasic typesVocabularyDeveloped by the SAE Machine Technical Committee SC8Tire and RimCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling Services
