ASTM F1436-02
(Guide)Standard Guide for Center Serving Diameter Dimensions for Archery Bow Strings
Standard Guide for Center Serving Diameter Dimensions for Archery Bow Strings
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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An American National Standard
Designation:F1436–02
Standard Guide for
Center Serving Diameter Dimensions for Archery Bow
1
Strings
This standard is issued under the fixed designation F 1436; 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 2.1.5 nock, n—a slot, or a special fitting that contains a slot,
that is positioned at the rear end of an arrow to engage the bow
1.1 This guide covers the formulation of preliminary guide-
string. The slot maintains secure contact with the bow string
lines for the outside diameter dimensions of the center servings
whilethebowisbeingdrawn,andalsoduringthereleaseofthe
for the shooting strings for archery bows.
string and the return of the string to its original position before
1.2 The values stated in inch-pound units are to be regarded
being drawn.
as the standard. The values given in parentheses are for
2.1.6 string groove width or slot throat dimension, n—the
information only.
narrowest portion of the slot opening in the nock, usually
2. Terminology
located near the open end of the slot.
2.1.7 string hole size, n—the dimension at the bottom or
2.1 Definitions of Terms Specific to This Standard:
base of the nock slot. This is the area where the bow string sits
2.1.1 bow string, n—the special multi-strand cord that spans
when it is seated in the slot.
an archery bow from tip to tip and is used to engage the rear
end of an arrow in order to launch it into flight.
3. Significance and Use
2.1.2 bow string material, n—strands of various materials,
3.1 This guide is not meant to be all inclusive since there
both natural and synthetic, from which bow strings are made.
are, and will continue to be, special circumstances that will
Most bow strings today are manufactured from synthetic
dictate the use of nonconforming dimensions. These special
materials that have superior strength and resistance to wear and
circumstances and the requirements that they establish cannot
atmosphericconditions.Differenceinthetensilestrengthofthe
be totally anticipated and therefore must be treated individu-
materials is responsible for a difference in the size and number
ally.
ofthestrandsinabowstring.Inaddition,differenceintheforce
3.2 These guidelines are based on an analysis of presently
necessary to draw various bows dictates varying numbers of
used materials for the manufacture of bow strings and the
strands of a given material to provide adequate strength for
strength requirements dictated by archery bows falling within
satisfactory service. The material used for wrapping to create a
a draw weight range of 0 to 100 lb (0 to 444.8 N).
center serving is available in several sizes or diameters. This,
3.3 These guidelines also address the desirability of proper
combined with variation in the number of strands used to make
fit of the arrow nock to the center serving and the mutual
the main string, permits adjustment of the outside diameter of
tolerances of serving and nock that will permit a proper fit to
the center serving within reasonable limits so that standardiza-
be maintained under most conditions.
tion is practical.
2.1.3 center serving, n—a wrapping of twisted or braided
4. Fit of the Nock on the Center Serving
line, or monofilament material, that is placed on the bow string
4.1 Preferable Fit—While there are some instances where
near its center. This wrapping covers the area where the nock
the practice is not followed, the majority of archers prefer that
of the arrow engages the bow string. It is used to resist the
the nock of the arrow be retained on the bow string with a
abrasive wear of repeated shots and also to provide a proper fit
slight “snap-fit.” This is mandatory when the archer uses a
with the slot of the nock.
mechanical device to hook onto the string to draw the bow, and
2.1.4 draw weight of the bow, n—the peak or maximum
to aid in releasing the string to launch the arrow. The
forcerequiredtodrawthebowstringofabowfromitsposition
alternative technique allows only the use of the fingers to draw
at rest (brace height) to the full draw position.
and release the string and provide action on the nock to retain
the arrow in position on the string. However, there are specific
1
This guide is under the jurisdiction of ASTM Committee F08 on Sports
methods of using the fingers, such as positioning all fingers
Equipment, Surfaces, and Facilities and is the direct responsibility of Subcommittee
under the nock, that also require “snap-fit” action of the nock.
F08.16 on Archery Products.
In general, whether using a mechanical device or exclusive
Current edition approved Nov. 10, 2002. Publi
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