ASTM F1436-11
(Guide)Standard Guide for Center Serving Diameter Dimensions for Archery Bow Strings
Standard Guide for Center Serving Diameter Dimensions for Archery Bow Strings
SIGNIFICANCE AND USE
This guide is not meant to be all inclusive since there are, and will continue to be, special circumstances that will dictate the use of nonconforming dimensions. These special circumstances and the requirements that they establish cannot be totally anticipated and therefore must be treated individually.
These guidelines are based on an analysis of presently used materials for the manufacture of bow strings and the strength requirements dictated by archery bows falling within a draw weight range of 0 to 100 lb (0 to 444.8 N).
These guidelines also address the desirability of proper fit of the arrow nock to the center serving.
SCOPE
1.1 This guide covers the formulation of preliminary guidelines for the outside diameter dimensions of the center servings for the shooting strings for archery bows.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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Designation: F1436 − 11 An American National Standard
Standard Guide for
Center Serving Diameter Dimensions for Archery Bow
1
Strings
This standard is issued under the fixed designation F1436; 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 2.1.4 draw weight of the bow, n—peak or maximum force
required to draw the bow string of a bow from its position at
1.1 This guide covers the formulation of preliminary guide-
rest (brace height) to the full draw position.
lines for the outside diameter dimensions of the center servings
2.1.5 nock, n—slot, or a special fitting that contains a slot,
for the shooting strings for archery bows.
that is positioned at the rear end of an arrow to engage the bow
1.2 The values stated in inch-pound units are to be regarded
string.
as the standard. The values given in parentheses are for
2.1.5.1 Discussion—The slot maintains secure contact with
information only.
the bow string while the bow is being drawn, and also during
2. Terminology
the release of the string and the return of the string to its
original position before being drawn.
2.1 Definitions of Terms Specific to This Standard:
2.1.1 bow string, n—special multi-strand cord that spans an 2.1.6 string groove width or slot throat dimension,
n—narrowest portion of the slot opening in the nock, usually
archery bow from end to end and is used to engage the rear end
of an arrow in order to launch it into flight. located near the open end of the slot.
2.1.7 string hole size, n—dimension at the bottom or base of
2.1.2 bow string material, n—strands of various materials,
both natural and synthetic, from which bow strings are made. the nock slot.
2.1.7.1 Discussion—This is the area where the bow string
2.1.2.1 Discussion—Most bow strings today are manufac-
tured from synthetic materials that have superior strength and sits when it is seated in the slot.
resistance to wear and atmospheric conditions. Difference in
3. Significance and Use
the tensile strength of the materials is responsible for a
difference in the size and number of the strands in a bowstring.
3.1 This guide is not meant to be all inclusive since there
In addition, difference in the force necessary to draw various
are, and will continue to be, special circumstances that will
bows may dictate varying numbers of strands of a given
dictate the use of nonconforming dimensions. These special
material to provide adequate strength for satisfactory service.
circumstances and the requirements that they establish cannot
The material used for wrapping to create a center serving is
be totally anticipated and therefore must be treated individu-
available in several sizes or diameters. This, combined with
ally.
variation in the number of strands used to make the main
3.2 These guidelines are based on an analysis of presently
string, permits adjustment of the outside diameter of the center
used materials for the manufacture of bow strings and the
serving within reasonable limits so that standardization is
strength requirements dictated by archery bows falling within
practical.
a draw weight range of 0 to 100 lb (0 to 444.8 N).
2.1.3 center serving, n—wrapping of twisted or braided line,
3.3 These guidelines also address the desirability of proper
or monofilament material, that is placed on the bow string near
fit of the arrow nock to the center serving.
its center.
2.1.3.1 Discussion—This wrapping covers the area where
4. Fit of the Nock on the Center Serving
the nock of the arrow engages the bow string. It is used to resist
4.1 Preferable Fit—While there are some instances where
the abrasive wear of repeated shots and also to provide a proper
the practice is not followed, the majority of archers prefer that
fit with the slot of the nock.
the nock of the arrow be retained on the bow string with a
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slight “snap-fit.” This is mandatory when the archer uses a
This guide is under the jurisdiction of ASTM Committee F08 on Sports
Equipment and Facilitiesand is the direct responsibility of Subcommittee F08.16 on
mechanical device to hook onto the string to draw the bow, and
Archery Products.
to aid in releasing the string to launch the arrow. The
Current edition approved Nov. 1, 2011. Published December 2011. Originally
alternative technique allows only the use of the fingers to draw
approved in 1992. Last previous edition approved in 2007 as F1436 – 07. DOI:
10.1520/F1436-11. and release the string and provide action on the nock to retain
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard
Designation:F1436–07 Designation:F1436–11
Standard Guide for
Center Serving Diameter Dimensions for Archery Bow
1
Strings
This standard is issued under the fixed designation F1436; 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
1.1 This guide covers the formulation of preliminary guidelines for the outside diameter dimensions of the center servings for
the shooting strings for archery bows.
1.2 The values stated in inch-pound units are to be regarded as the standard.The values given in parentheses are for information
only.
2. Terminology
2.1 Definitions of Terms Specific to This Standard:
2.1.1 bow string, n—special multi-strand cord that spans an archery bow from end to end and is used to engage the rear end
of an arrow in order to launch it into flight.
2.1.2 bow string material, n—strands of various materials, both natural and synthetic, from which bow strings are made.
2.1.2.1 Discussion—Most bow strings today are manufactured from synthetic materials that have superior strength and
resistance to wear and atmospheric conditions. Difference in the tensile strength of the materials is responsible for a difference in
the size and number of the strands in a bowstring. In addition, difference in the force necessary to draw various bows may dictate
varyingnumbersofstrandsofagivenmaterialtoprovideadequatestrengthforsatisfactoryservice.Thematerialusedforwrapping
to create a center serving is available in several sizes or diameters. This, combined with variation in the number of strands used
to make the main string, permits adjustment of the outside diameter of the center serving within reasonable limits so that
standardization is practical.
2.1.3 center serving, n—wrapping of twisted or braided line, or monofilament material, that is placed on the bow string near
its center.
2.1.3.1 Discussion—This wrapping covers the area where the nock of the arrow engages the bow string. It is used to resist the
abrasive wear of repeated shots and also to provide a proper fit with the slot of the nock.
2.1.4 draw weight of the bow, n—peak or maximum force required to draw the bow string of a bow from its position at rest
(brace height) to the full draw position.
2.1.5 nock, n—slot, or a special fitting that contains a slot, that is positioned at the rear end of an arrow to engage the bow string.
2.1.5.1 Discussion—The slot maintains secure contact with the bow string while the bow is being drawn, and also during the
release of the string and the return of the string to its original position before being drawn.
2.1.6 string groove width or slot throat dimension, n—narrowest portion of the slot opening in the nock, usually located near
the open end of the slot.
2.1.7 string hole size, n—dimension at the bottom or base of the nock slot.
2.1.7.1 Discussion—This is the area where the bow string sits when it is seated in the slot.
3. Significance and Use
3.1 This guide is not meant to be all inclusive since there are, and will continue to be, special circumstances that will dictate
the use of nonconforming dimensions. These special circumstances and the requirements that they establish cannot be totally
anticipated and therefore must be treated individually.
3.2 These guidelines are based on an analysis of presently used materials for the manufacture of bow strings and the strength
requirements dictated by archery bows falling within a draw weight range of 0 to 100 lb (0 to 444.8 N).
3.3 These guidelines also address the desirability of proper fit of the arrow nock to the center serving.
1
This guide is under the jurisdiction of ASTM Committee F08 on Sports Equipment and Facilities and is the direct responsibility of Subcommittee F08.16 on Archery
Products.
Current edition approved Oct.Nov. 1, 2007.2011. Published November 2007.December 2011. Originally approved in 1992. Last previous edition approved in 20022007
as F1436 – 027. DOI: 10.1520/F1436-07.10.1520/F1436-11.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F1436–11
4. Fit of the Nock on the Center Serving
4.1 Preferable Fit—While there are some instances where the practice is not followed, the majority of archers prefer that the
no
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