ASTM_D_6205_-_12.pdf

Designation:D620512Standard 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 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 practice covers the testing of the James Machinefor repeatability of static coefficient of friction,relative to astandard reference 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 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 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 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:3D2047 Test Method for Static Coefficient of Friction ofPolish-Coated Flooring Surfaces 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 for 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 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 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 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 leathersole material,mounted on a precision shoe pad as described inSection 7 of Test Method D2047.3.2.5 standard test sequence,nseries of not less than eightconsecutive Static Coefficient of Friction(SCOF)determina-tions made on the Borco/standard leather interface or controlpolish/standard leather interface in accordance with this prac-tice.The arithmetic average and standard deviation of one1This practice is under the jurisdiction of ASTM Committee D21 on Polishesand is the direct responsibility of Subcommittee D21.06 on Slip Resistance.Current edition approved Oct.1,2012.Published October 2012.Originallyapproved in 1998.Last previous edition approved in 2006 as D6205-06.DOI:10.1520/D6205-12.2Borco is a registered trademark for a Danish product imported into the UnitedStates by Sierra 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.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 Conshohocken,PA 19428-2959.United States1 standard test sequence is the Static Coefficient of Friction(SCOF)of the interface.4.Summary of Practice4.1 The performance of the James Machine,in the standardconfiguration for the determination of Static Coefficient ofFriction(SCOF),is tested relative to a standard workinginterface consisting of the surface of white Borco material inco