ASTM D6205-06
(Practice)Standard Practice for Calibration of the James Static Coefficient of Friction Machine
Standard Practice for Calibration of the James Static Coefficient of Friction Machine
SIGNIFICANCE AND USE
This practice is used to calibrate the James Machine for determination of static coefficient of friction of polish surfaces in accordance with Test Method D 2047. Over considerable time and repeated use the James Machine may tend to mechanical misalignment, giving self-evident, anomalous readings. The periodic accumulation and comparison of data generated by this practice provides an indication of when the machine is no longer within the calibration limits and can no longer be expected to provide accurate and reliable data.
Semi-automated James machines may perform an internal calibration/alignment test. These automated tests should be routinely run per the manufacturer’recommendation. If the repeatability tests of this practice indicate that the machine is out of calibration, the manufacturer should be contacted and his suggestions followed. Unqualified disassembly, modification, or adjustment may void the instrument warranty.
SCOPE
1.1 This practice covers the testing of the James Machine for repeatability of static coefficient of friction, relative to a standard reference interface consisting of the working surfaces of Borco board and standard leather shoe sole material, or a control polish film and standard leather shoe material. The practice provides basis data on the stability of the James Machine to ensure accurate static coefficient of friction determinations over time and repeated use and for determining if the James Machine is mechanically calibrated and properly aligned.
1.2 This practice is written specifically for James Machines with manual or motorized test table transport. Variations of this practice for the calibration of versions of James Machines which are semi-automated are obvious. Calibration practices suggested by the manufacturer of semi-automatic James Machines should be followed in preference to this practice.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D6205 − 06
StandardPractice for
Calibration of the James Static Coefficient of Friction
1
Machine
This standard is issued under the fixed designation D6205; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D2825 Terminology Relating to Polishes and Related Mate-
rials
1.1 This practice covers the testing of the James Machine
D4103 Practice for Preparation of Substrate Surfaces for
for repeatability of static coefficient of friction, relative to a
Coefficient of Friction Testing
standard reference interface consisting of the working surfaces
2 E29 Practice for Using Significant Digits in Test Data to
of Borco board and standard leather shoe sole material, or a
Determine Conformance with Specifications
control polish film and standard leather shoe material. The
E178 Practice for Dealing With Outlying Observations
practice provides basis data on the stability of the James
2.2 Federal Specification:
Machine to ensure accurate static coefficient of friction deter-
KK-L-165C Leather, Cattlehide, Vegetable Tanned and
minationsovertimeandrepeateduseandfordeterminingifthe
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Chrome Tanned, Impregnated, and Soles
James Machine is mechanically calibrated and properly
aligned.
3. Terminology
1.2 This practice is written specifically for James Machines
3.1 Definitions:For general definitions, see Test Method
withmanualormotorizedtesttabletransport.Variationsofthis
D2047 and Terminology D2825.
practice for the calibration of versions of James Machines
3.2 Definitions of Terms Specific to This Standard:
which are semi-automated are obvious. Calibration practices
3.2.1 Borco, n—special 5-ply vinyl drawing board cover.
suggested by the manufacturer of semi-automatic James Ma-
3.2.2 control polish, n—a reference polish of known or well
chines should be followed in preference to this practice.
established Static Coefficient of Friction, as determined by
1.3 This standard does not purport to address all of the
repeated determinations using Test Method D2047 over a long
safety concerns, if any, associated with its use. It is the
period of time and preferably by determinations on multiple
responsibility of the user of this standard to establish appro-
James Machines.
priate safety and health practices and determine the applica-
3.2.3 reference surface, Borco standard leather system,
bility of regulatory limitations prior to use.
n—working interface of the set consisting of the white side of
the Borco material, mounted as described in this practice, and
2. Referenced Documents
the standard leather shoe sole material, mounted on a precision
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2.1 ASTM Standards:
shoe pad as described in this practice.
D2047 Test Method for Static Coefficient of Friction of
3.2.4 standard test sequence, n—series of not less than eight
Polish-Coated Flooring Surfaces as Measured by the
consecutive Static Coefficient of Friction (SCOF) determina-
James Machine
tions made on the Borco/standard leather interface or control
polish/standard leather interface in accordance with this prac-
tice. The arithmetic average and standard deviation of one
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This practice is under the jurisdiction of ASTM Committee D21 on Polishes
standard test sequence is the Static Coefficient of Friction
and is the direct responsibility of Subcommittee D21.06 on Slip Resistance.
(SCOF) of the interface.
Current edition approved June 1, 2006. Published June 2006. Originally
approved in 1998. Last previous edition approved in 1998 as D6205-98. DOI:
10.1520/D6205-06.
4. Summary of Practice
2
Borco is a registered trademark for a Danish product imported into the United
4.1 The performance of the James Machine, in the standard
States by Sierra Group, a division of Wallace Leisure Products, Inc.Available from
Papyro-TexA/S, DK-2730, Herlev, Denmark; distributed in NorthAmerica through
configuration for the determination of Static Coefficient of
drafting and office supply stores under the trade names “Borco,” “Vyco,” and
Friction (SCOF), is tested relative to a standard working
“Altex” board covers.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on Available from Standardization Documents Order Desk, Bldg 4 Section D, 700
the ASTM website. Robbins Ave., Philadelphia, PA 19111-5094, Atten: NPODS.
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