1、Designation: F 2031 05An American National StandardStandard Test Method forMeasurement of Arrow Shaft Static Spine (Stiffness)1This standard is issued under the fixed designation F 2031; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
2、on, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the formulation and designationof arrow spine measurement standards and nomen
3、clature forarrow shafts.1.2 The English system of measurement, specifically inchesof deflection, shall be used for all spine values expressed for agiven arrow shaft.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of th
4、e user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Terminology2.1 Definitions of Terms Specific to This Standard:2.1.1 arrow spinethe deflection of the shaft, measured ininches, in a three-point loa
5、d scenario where a specified mass isapplied to the midpoint of the arrow shaft supported at a fixedspan.2.1.2 spine around shaft variationspine variation betweenfour readings taken at 90 spacing around the shaft.2.1.3 static spinestiffness of the arrow shaft at rest on aspine measurement device.3. S
6、ignificance and Use3.1 This test method is intended to provide a stable industrystandard by which benchmarks and comparisons can be madeby manufacturers and consumers.3.2 This test method is intended to clarify and define arrowspine or stiffness as it pertains to the archery industry and sport.4. Me
7、asurement Guidelines for Arrow Spine4.1 Arrow Spine MeasurementThe most prevalent andcommonly accepted method of measuring arrow shaft spineinvolves supporting the arrow shaft along a known, fixed span,and using an indicator device while the arrow shaft is deflectedwith a known weight depending from
8、 or pressing upon thearrow shaft at the exact center between the supports for theshaft. For this test method, a span type measurement is to beused. The length of the arrow shaft to be tested, the spandistance to be used, and the equipment to be used are definedas follows:4.1.1 Shaft Length The shaft
9、 length to be used forstandard spine measurement is the span distance plus 1 in. toallow for axial travel during deflection.4.1.2 Span Distance The length of the span to be used forthis test is 28 in. (71.1 cm). For those shafts that aremanufactured less than 29 in. (73.7 cm) in length, the spandist
10、ance to be used is 23 in. (58.4 cm).4.1.2.1 Span = 28 in. (71.1 cm) for shafts longer than 29 in.(73.7 cm).4.1.2.2 Span = 23 in. (58.4 cm) for shafts shorter than 29 in.(73.7 cm).4.1.2.3 Approximate conversion formula to convert a spineat 23 in. (58.4 cm) span to a 28 in. (71.1 cm) span:283in.371.13
11、cm3! 5 1.804233in.358.43cm3!or 23 in. (58.4 cm) spine 3 1.804 = 28 in. (71.1 cm) spine4.1.3 Measurement LocationArrow shafts shall be mea-sured for spine at the center of the span. In instances where thisis not practical due to shaft design, the manufacturer shalldisclose the measurement location(s)
12、 from an identifiabledatum on the shaft.4.1.4 Measurement EquipmentMeasurement equipmentmay involve the use of dial indicators, probe indicators, andlaser gauging devices.4.1.4.1 Mechanical IndicatorsIn the case of mechanicalindicators, probe pressure should be limited to no more than0.176 oz (5 g).
13、4.1.4.2 Noncontact Gauging EquipmentNoncontact gaug-ing equipment, such as laser gauging equipment, shall read towithin 0.001 in. of mechanical contact measurement equipmentconforming to the test methods and specifications outlinedherein.4.1.5 Span Support PointsSupport points shall allow freeaxial
14、travel of the shaft as the shaft is deflected duringmeasurement.1This test method is under the jurisdiction of ASTM Committee F08 on SportsEquipment and Facilities and is the direct responsibility of Subcommittee F08.16 onArchery Products.Current edition approved Oct. 1, 2005. Published October 2005
15、. Originallyapproved in 2000. Last previous edition approved in 2000 as F 2031 00.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.4.1.5.1 Span Support Point ConfigurationThe shaft sup-port point shall have a maximum diameter of 0.125
16、 in. (3.175mm) at the point of contact with the arrow shaft.4.1.6 Test Description The arrow shaft shall be deflectedby a 1.94 lb (880 g) weight at the center of the span. Theweight may depend from or rest upon the shaft. The differencebetween the position of a given datum at the center of the shaft
17、and the position of the same datum during deflection shall bethe shaft spine value. The reading shall be taken within 30 s toprevent plastic deformation of the shaft material from affectingthe readings.4.2 Measurement AccuracyThe accuracy and span toler-ance of the equipment and setup shall have a m
18、easuredaccuracy of at least 60.002 in. (0.05 mm).5. Industry Guidelines for Specification Disclosure5.1 The term standard spine may be used in instances wherea reading is taken in accordance with this test method.5.2 Spine readings shall be taken within a standard tempera-ture range of 65 to 75F (18
19、 to 24C). Because humidity is nota factor in arrow shaft measurement a relative humidity rangeof 5 to 85 % is permissible.5.3 The shaft span for which the reading has been takenshall be clearly defined in English units, specifically inches (forexample, 0.470 in. arrow shaft spine 28 in. span).5.4 Sp
20、ine variation around the arrow shaft may be expressedas standard spine around shaft variation (x) where x is avalue, in inches of the total spine variation, derived from fourspine readings taken at locations evenly spaced 90 around theshaft.5.5 In instances where a manufacturer wishes to specify apl
21、us/minus reading, this should be indicated as distinct fromstandard spine (for example, 60.001 in.)6. Precision and Bias6.1 It is not practical to specify the precision of theprocedure of this test method because it has not yet beendetermined.6.2 The procedure described in this test method has no bi
22、asbecause the spine of an arrow shaft is defined only asprescribed in this test method.7. Keywords7.1 archery; arrow shafts; spine; static spine; total indicatorreadingASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin t
23、his standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must
24、be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of there
25、sponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F2031052
