ASTM F2219-10

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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:F2219–09 Designation:F2219–10
Standard Test Methods for
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Measuring High-Speed Bat Performance
This standard is issued under the fixed designation F2219; 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
1.1Thesetestmethodsdefinea1.1 Amethodfordeterminingbatperformancebymeasuringthebat-ballcoefficientofrestitution
(BBCOR), deriving the ball exit speed ratio (BESR), and calculating a batted-ball speed (BBS). It is applicable to baseball and
softball bats of any construction or material.The test methods provide quantitative measures of bat dynamic performance that may
be used for comparison purposes.
1.2 The BBCOR, BESR, and BBS are each calculated from measurements taken in the laboratory on test equipment meeting
the requirements defined in this specification. standard.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.4 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 to determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
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2.1 ASTM Standards:
F1887 Test Method for Measuring the Coefficient of Restitution (COR) of Baseballs and Softballs
F1888 Test Method for Compression-Displacement of Baseballs and Softballs
F2398 Test Method for Measuring Moment of Inertia and Center of Percussion of a Baseball or Softball Bat
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 balance point (BP), n—distance to the center of mass of a bat when measured from the distal end of the bat knob. bat.
3.1.2 ball exit speed (Vball exit speed (v), n—outbound speed of a ball following impact with a bat as defined in these test
f r
methods.
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3.1.3 ball exit speed ratio (BESR), n—ratio of ball exit speed (v ) to ball inbound speed (v ) plus ⁄2 , as determined by these
r i
test methods.
3.1.4 ball inbound speed (v), n—inbound speed of a ball prior to impact with a bat as defined in this test method.
i
3.1.5 bat-ball coeffıcient of restitution (BBCOR)—COR of a specific ball colliding with a bat as defined in these test methods.
See coeffıcient of restitution (COR).
3.1.6 center of percussion (COP), n—also known as the center of oscillation, the length of a simple pendulum with the same
period as a physical pendulum, as in a bat oscillating on a pivot.
3.1.7coeffıcient of restitution (COR), n—measure of impact efficiency calculated as the relative speed of the objects after impact
divided by the relative speed of the objects before impact.
3.1.8
3.1.7 moment of inertia (MOI), n—measure of mass distribution relative to an axis of rotation. It is the product of the mass
multiplied by the square of the distance to the mass, summed over the entire bat.
4. Significance and Use
4.1 These test methods offer a laboratory measure of the performance of baseball and softball bats.
4.2 Use of these test methods can provide quantitative batted-ball speed and metrics of bat performance.
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These test methods are under the jurisdiction of ASTM Committee F08 on Sports Equipment and Facilities and are the direct responsibility of Subcommittee F08.26
on Baseball and Softball Equipment.
Current edition approved JuneMay 1, 2009.2010. Published July 2009.June 2010. Originally approved in 2002. Last previous edition approved in 20072009 as
F2219 – 079. DOI: 10.1520/F2219-109.
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volume information, refer to the standard’s Document Summary page on the ASTM website.
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F2219–10
5. Apparatus and Equipment
5.1 Test Balls—Officialbaseballsandsoftballsapprovedforuseinthegameofbaseballorsoftballandtestedinaccordancewith
Table 1. —Baseballs or softballs as determined by those specifying the test requirements.
5.2 Balls specification va
...