1、Designation:D620520Standard Practice forCalibration of the James Static Coefficient of FrictionMachine1This standard is issued under the fixed designation D6205;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisio
2、n.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 practice covers the testing of the James Machinefor repeatability of static coefficient of friction,relative to astandard referenc
3、e interface consisting of the working surfacesof Borco2board and standard leather shoe sole material,or acontrol polish film and standard leather shoe material.Thepractice provides basis data on the stability of the JamesMachine to ensure accurate static coefficient of friction deter-minations over
4、time and repeated use and for determining if theJames Machine is mechanically calibrated and properlyaligned.1.2 This practice is written specifically for James Machineswith manual or motorized test table transport.Variations of thispractice for the calibration of versions of James Machineswhich are
5、 semi-automated are obvious.Calibration practicessuggested by the manufacturer of semi-automatic James Ma-chines should be followed in preference to this practice.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the use
6、r of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in th
7、e Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D2047 Test Method for Static Coefficient of Friction ofPolish-Coated Flooring S
8、urfaces as Measured by theJames MachineD2825 Terminology Relating to Polishes and Related Mate-rialsD4103 Practice for Preparation of Substrate Surfaces forCoefficient of Friction TestingE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE178 Practice f
9、or Dealing With Outlying Observations2.2 Federal Specification:KK-L-165C Leather,Cattlehide,Vegetable Tanned andChrome Tanned,Impregnated,and Soles43.Terminology3.1 Definitions:For general definitions,see Test MethodD2047 and Terminology D2825.3.2 Definitions of Terms Specific to This Standard:3.2.1
10、 Borco,nspecial 5-ply vinyl drawing board cover.3.2.2 Borco/standardleatherreferenceinterface,nworking interface consisting of the white side of the Borcomaterial,mounted as described in this practice,and thestandard leather shoe sole material,mounted on a precisionshoe pad as described in Section 7
11、 of Test Method D2047.3.2.3 control polish,na reference polish of known or wellestablished Static Coefficient of Friction,as determined byrepeated determinations using Test Method D2047 over a longperiod of time and preferably by determinations on multipleJames Machines.3.2.4 control polish/standard
12、 leather reference interface,nworking interface consisting of a dried film of controlpolish,applied according to the procedures of Practice D4103on standard vinyl composition tile,and the standard leather1This practice is under the jurisdiction of ASTM Committee D21 on Polishesand is the direct resp
13、onsibility of Subcommittee D21.06 on Slip Resistance.Current edition approved June 15,2020.Published July 2020.Originallyapproved in 1998.Last previous edition approved in 2012 as D6205-12.DOI:10.1520/D6205-20.2Borco is a registered trademark for a Danish product imported into the UnitedStates by Si
14、erra Group,a division of Wallace Leisure Products,Inc.Available fromPapyro-Tex A/S,DK-2730,Herlev,Denmark;distributed in North America throughdrafting and office supply stores under the trade names“Borco,”“Vyco,”and“Altex”board covers.The sole source of supply of Borco known to the committee at this
15、 time isPhippss Reprographics 6920 Plainfield Rd,Cincinnati,OH 45236.If you are awareof alternative suppliers,please provide this information to ASTM InternationalHeadquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you may attend.Se
16、e also:https:/www.thehcpa.org/resources/#1517763820809-cf4141f9-4ecb.3For 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.4Available from Standardization Documents Order Desk,Bldg 4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Atten:NPODS.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Cons
