ASTM F1752-96(2001)
(Test Method)Standard Test Method for Archery Bow Component—Cord Material
Standard Test Method for Archery Bow Component—Cord Material
SCOPE
1.1 This test method establishes the classification and testing of cord as a component material used in the fashioning of bowstrings.
1.2 This test method is not intended to provide information beyond any evaluation of the cord material that would determine its fitness for use other than in the fabrication of completed bowstrings.
1.3 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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An American National Standard
Designation:F1752–96 (Reapproved 2001)
Standard Test Method for
1
Archery Bow Component—Cord Material
This standard is issued under the fixed designation F 1752; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.3 denier, tex, n—direct yarn numbering systems express-
ing size of cord material in terms of mass (weight) of unit
1.1 This test method establishes the classification and test-
lengthper9000m(9842yd)fordenieror1000m(1094yd)for
ing of cord as a component material used in the fashioning of
tex.
bowstrings.
3.4 diameter, n—a measure of the thickness of the cord
1.2 This test method is not intended to provide information
material.
beyond any evaluation of the cord material that would deter-
3.5 EASL, n—elongation at a set load.
mine its fitness for use other than in the fabrication of
3.6 elongation, n—the amount that a cord material stretches
completed bowstrings.
measured as a percentage of the original length either at the
1.3 This standard does not purport to address all of the
point of rupture or at some other interval of applied load.
safety concerns, if any, associated with its use. It is the
3.7 free gage length, n—length of unsupported test speci-
responsibility of the user of this standard to establish appro-
men between holding clamps and free from contact with any
priate safety and health practices and determine the applica-
snubbing or other sources that could result in nonuniform gage
bility of regulatory limitations prior to use.
length measurement.
2. Referenced Documents
3.8 static load stretch/relaxation, n—a measure of the
amount a cord material moves while under static load and with
2.1 ASTM Standards:
load subsequently removed, measured as a percentage of the
D 76 Specification for Tensile Testing Machines for Tex-
2
prestressed original length.
tiles
2
3.9 standard condition, n—a condition reached by cord
D 123 Terminology Relating to Textiles
2
material when in moisture equilibrium with a standard atmo-
D 204 Test Methods for Sewing Threads
2
sphere of a given temperature and relative humidity.
D 1776 Practice for Conditioning Textiles for Testing
3.10 strength, n—the maximum force applied to a cord
D 1907 Test Method for Linear Density of Yarn (Yarn
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material causing it to break.
Number) by the Skein Method
D 2256 Test Method for Tensile Properties of Yarns by the
4. Significance and Use
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Single Strand Method
4.1 This test method is intended to provide the user of cord
3. Terminology
materials for bowstrings the basic information for evaluation
and procurement.
3.1 bowstring, n—completed assembly constructed in part
4.2 This test method is not meant to be all inclusive since
from multiple strands of cord material lashed at the center and
special circumstances may occur that will dictate the use of
loop ends with serving string materials and used to connect the
nonconforming procedures for evaluation. Special circum-
limbs of a bow by which to launch an arrow.
stances and the requirements they establish cannot be antici-
3.2 cord material, n—applied to a variety of natural or
pated totally and, therefore, must be considered on an indi-
manmadetextilematerials.Cordmaterialmaybeofmonocord,
vidual basis.
twisted, cable, or braided construction.
5. Test Methods
5.1 Standard Condition—Refer to Practice D 1776 for stan-
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This test method is under the jurisdiction of ASTM Committee F08 on Sports
dard condition requirements:
Equipment and Facilities and is the direct responsibility of Subcommittee F08.16 on
Archery Products.
70 6 2°F ~21 6 1°C!,65 6 2 % relative humidity. (1)
Current edition approved Nov. 10, 1996. Published April 1997.
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Annual Book of ASTM Standards, Vol 07.01. 5.2 Denier, Tex—Refer to Test Method D 1907, Option 1:
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F1752–96 (2001)
TABLE 1 Cord Material Strength Requirements
A
Cord Material Strength, lb
15–39 40–64 65–89 90–114 115–139 140–164 165–189
Specified weight, lb 5 10 15 20 25 30 35
A
Multiply by 4.448 for conversion to newtons.
~L2 2 L1!/L1 3 100 5 % Initial Stretch (3)
5.2.1 Wind 12–yd reeling using 1.5–yd perimeter reel. Do
not tie reeling ends; rather, cut at overlap of stated yardage.
5.4.6.2 24-h Stretch:
Weigh reeling to the nearest 1 mg.
~L3 2 L1!/L1 3 100 5%242h Stretch (4)
5.2.2 Calculation—Report test results as one test specimen/
5.4.6.3 48-h Stretch:
sample and average of three samples:
~L4 2 L1!/L1 3 100 5%482h Stretch (5)
~C 3
...
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