ASTM F2219-13

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F2219 − 13 AnAmerican National Standard
Standard Test Methods for
1
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 3.1.2 ball exit speed ratio (BESR), n—ratio of ball exit
1
speed to the ball inbound speed plus ⁄2 .
1.1 A method for determining bat performance by measur-
3.1.3 bat-ball coeffıcient of restitution (BBCOR), n—COR
ing the bat-ball coefficient of restitution (BBCOR), deriving
of a specific ball colliding with a bat.
the ball exit speed ratio (BESR), and calculating a batted-ball
speed (BBS). It is applicable to baseball and softball bats of
3.1.4 batted ball speed (BBS), n—the speed that a ball
any construction or material. The test methods provide quan-
would be hit off a bat in play based on given pitch and bat
titative measures of bat dynamic performance that may be used
speeds.
for comparison purposes.
3.1.5 coeffıcient of restitution (COR), n—measure of impact
1.2 The BBCOR, BESR, and BBS are each calculated from
efficiency calculated as the relative speed of the objects after
measurements taken in the laboratory on test equipment
impact divided by the relative speed of the objects before
meeting the requirements defined in this standard.
impact.
1.3 The values stated in inch-pound units are to be regarded 3.1.6 cylindrical coeffıcient of restitution (CCOR), n—the
as standard. The values given in parentheses are mathematical ratio of the rebound to incoming speed of a ball impacting a
conversions to SI units that are provided for information only solid rigid cylinder.
and are not considered standard.
3.1.7 dynamic stiffness (DS), n—a normalized measure of
1.4 This standard does not purport to address all of the the ball impact force having units of stiffness (lb/in. or kN/m).
safety concerns, if any, associated with its use. It is the It is obtained by dividing the square of the peak force between
responsibility of the user of this standard to establish appro- the ball and impact surface by the ball mass and the square of
priate safety and health practices and to determine the the incoming ball speed.
applicability of regulatory limitations prior to use.
3.1.8 moment of inertia (MOI), n—measure of mass distri-
bution relative to an axis of rotation. It is the product of the
2. Referenced Documents
mass multiplied by the square of the distance to the mass,
2
2.1 ASTM Standards:
summed over the entire bat.
F2398 Test Method for Measuring Moment of Inertia and
3.1.9 test sponsor, n—group,associationorindividualspeci-
Center of Percussion of a Baseball or Softball Bat
fying test requirements including ball specifications, perfor-
F2845 Test Method for Measuring the Dynamic Stiffness
mance measure, and test speed.
(DS)andCylindricalCoefficientofRestitution(CCOR)of
4. Significance and Use
Baseballs and Softballs
4.1 These test methods offer a laboratory means to quanti-
3. Terminology
tatively compare the performance of baseball and softball bats.
3.1 Definitions of Terms Specific to This Standard:
4.2 Use of these test methods can provide quantitative
3.1.1 balance point (BP), n—distance to the center of mass
metrics of bat performance.
from the knob end of the bat.
5. Apparatus and Equipment
5.1 Test Balls—Baseballs or softballs as determined by the
1
These test methods are under the jurisdiction of ASTM Committee F08 on
test sponsor.
Sports Equipment, Playing Surfaces, and Facilities and are the direct responsibility
of Subcommittee F08.26 on Baseball and Softball Equipment.
5.1.1 Ball specification values are to be recorded and traced
CurrenteditionapprovedJune1,2013.PublishedJuly2013.Originallyapproved
to individual balls.
in 2002. Last previous edition approved in 2011 as F2219 – 11. DOI: 10.1520/
F2219-13.
5.2 Bat-Ball Test Apparatus:
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.2.1 Ball Cannon—A device capable of shooting a ball at
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
speeds up to 220 ft/s (67.1 m/s, 150 mph). Balls shall be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. oriented to impact the strike surface between the stitches.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F2219 − 13
Typical pitching machines cannot yield the aiming accuracy at 45° atop the light box, one video camera can observe both
required by these test
...