ASTM_E_1844_-_08_2015.pdf

Designation:E184408(Reapproved 2015)Standard Specification forA Size 10 45 Smooth-Tread Friction Test Tire1This standard is issued under the fixed designation E1844;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers the general requirements for asmooth-tread standard tire for measuring tire-pavement frictionforces.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are provided forinformation purposes only.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D297 Test Methods for Rubber ProductsChemical Analy-sisD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD1054 Test Method for Rubber PropertyResilience Usinga Goodyear-Healey Rebound Pendulum(Withdrawn2010)3D1765 Classification System for Carbon Blacks Used inRubber ProductsD2240 Test Method for Rubber PropertyDurometer Hard-nessD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsE867 Terminology Relating to Vehicle-Pavement Systems2.2 Other Document:GriptesterGTSV1 Descriptive Booklet43.Terminology3.1 Terminology used in this specification is in accordancewith Terminology E867.4.Materials and Manufacture4.1 The individual standard tires shall conform to the designstandards of Section 6.Dimensions,weights,and permissiblevariations are also given in Section 6 and Fig.1 and Fig.2.4.2 Tread compounding,fabric processing,and all tiremanufacturing shall be certified to ensure that the specifica-tions are met(see Section 8).4.3 The markings on the tire,as shown in Fig.1,shall bemolded on the sides of the tire.4.4 Fig.1 shows a view of the tread surface and a side viewof the tire.Fig.2 is a typical tire cross-section with criticaldimensions identified.4.5 Tire should be mounted so that it is rotated in thedirection of the arrow on the side of the tire.See Fig.1.5.Material Requirements5.1 The compounding requirements for the tread compoundare given in Table 1.5.2 The fabric shall be Nylon,1260/2 Denier.NOTE1Certain proprietary products have been specified since exactduplication of properties of the finished tire may not be achieved withother similar products.This inclusion does not in any way comprise arecommendation for these proprietary products nor against similar prod-ucts of other manufacturers,nor does it imply any superiority over anysuch similar products.6.Physical Requirements6.1 The physical and mechanical test requirements of thetread compound are given in Table 2.7.Construction,Dimensions and Permissible Variations7.1 ConstructionThe tire shall be size 10 45,tube type,two plies,nylon cord,and bias construction.1This specification is under the jurisdiction ofASTM Committee E17 on Vehicle-Pavement Systems and is the direct responsibility of Subcommittee E17.24 on Tireand Slider Characteristics.Current edition approved Sept.1,2015.Published December 2015.Originallyapproved in 1996.Last previous edition approved in 2008 as E1844 08.DOI:10.1520/E1844-08R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Findlay-Irvine Ltd.,Bog Road,Penicuik,MidlothianEH269BU,Scotland.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.2 DimensionsTread width shall be 51 6 2.0 mm(2.0 60.08 in.),the tread radius shall be 165 6 25 mm(6.5 6 1.0 in.),the cross-sectional width shall be 102 6 2 mm(4.0 6 0.08 in.),and the outside diameter at the centerline shall be 258 6 2 mm(10.15 6 0.08 in.)when measured on a 89 mm(3.5 in.)widerim at 138 6 3 kPa(20 6 0.5 PSI).See Fig.2 which shows theinflated dimensions of the new tire.7.3 TreadThe tread surface shall be smooth(blank)with-out any ribs or grooves.The tread shall have a thickness of 5mm(0.20 in.)and an undertread thickness of 2 6 0.5 mm(0.086 0.02 in.)at the tread centerline.7.4 Wear IndicatorsThere will be two holes molded intothe tire tread,5.0 mm(0.20 in.)deep and 3.2 mm(0.125 in.)indiameter.These two wear-indicators will be spaced 180 apart.8.Workmanship8.1 Tires shall be free of defects in workmanship andmaterial.9.Test Methods9.1 For information on the following,refer to the ASTMstandards liste