ASTM F1888-09
(Test Method)Test Method for Compression-Displacement of Baseballs and Softballs
Test Method for Compression-Displacement of Baseballs and Softballs
SIGNIFICANCE AND USE
The static compression-displacement of a baseball or softball is a mechanical property which can correlate to dynamic properties.
This test method is suitable for obtaining data in research and development, quality control, and classifying balls by the compression-displacement.
Sports associations can use compression-displacement standards in specifications for official baseballs and softballs standards in specifications for official baseballs and softballs for purposes of consistency of performance.
This same test procedure can be utilized with other compressive forces and the specified force is not necessarily the same as experienced in actual use.
SCOPE
1.1 This test method describes a comparative measurement method for baseballs and softballs as defined by a static compression displacement test.
1.2 This test method is based on a slow rate force-displacement measurement.
1.3 This procedure is for baseballs and softballs meeting standards established by the sports' governing bodies.
Note 1—Since the compression-displacement of baseballs and softballs can influence the performance characteristics, this test provides a simple method to compare and categorize such balls based on force levels in a standardized compression-displacement test.
1.4 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.
1.5 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 determine the applicability of regulatory limitations prior to use.
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Designation: F1888 − 09 AnAmerican National Standard
Standard Test Method for
1
Compression-Displacement of Baseballs and Softballs
This standard is issued under the fixed designation F1888; 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 compression-displacement, n—the reduction in ball
diameter under a specified compressive load between two flat
1.1 This test method describes a comparative measurement
plates. Synonymous with compression-deflection.
method for baseballs and softballs as defined by a static
3.1.3 force, n—the resistance to displacement. The interac-
compression displacement test.
tion between test machine and ball during compression.
1.2 This test method is based on a slow rate force-
3.1.4 four seams, n—plane passing through the middle of
displacement measurement.
the ball intersecting four stitch lines.
1.3 This procedure is for baseballs and softballs meeting
3.1.5 two seams, n—plane passing through the middle of the
standards established by the sports’ governing bodies.
ball intersecting two stitch lines.
NOTE1—Sincethecompression-displacementofbaseballsandsoftballs
can influence the performance characteristics, this test provides a simple
4. Summary of Test Method
method to compare and categorize such balls based on force levels in a
4.1 The baseball or softball is placed between two flat-plate
standardized compression-displacement test.
surfaces of a compression machine and then compressed to a
1.4 The values stated in inch-pound units are to be regarded
standard displacement of 6.35-mm (0.25-in.).The compression
as standard. The values given in parentheses are mathematical
load (force) applied at the standard displacement is recorded.
conversions to SI units that are provided for information only
and are not considered standard.
5. Significance and Use
1.5 This standard does not purport to address all of the
5.1 The static compression-displacement of a baseball or
safety concerns, if any, associated with its use. It is the
softball is a mechanical property which can correlate to
responsibility of the user of this standard to establish appro-
dynamic properties.
priate safety and health practices and determine the applica-
5.2 This test method is suitable for obtaining data in
bility of regulatory limitations prior to use.
research and development, quality control, and classifying
2. Referenced Documents
balls by the compression-displacement.
2
2.1 ASTM Standards: 5.3 Sports associations can use compression-displacement
E177 Practice for Use of the Terms Precision and Bias in
standards in specifications for official baseballs and softballs
ASTM Test Methods standards in specifications for official baseballs and softballs
E691 Practice for Conducting an Interlaboratory Study to
for purposes of consistency of performance.
Determine the Precision of a Test Method
5.4 This same test procedure can be utilized with other
compressive forces and the specified force is not necessarily
3. Terminology
the same as experienced in actual use.
3.1 Definitions of Terms Specific to This Standard:
3.1.1 baseballs and softballs, n—any such ball defined by
6. Apparatus
the rules of the game as published by the sports’ governing
6.1 Compression Device, to compress the test ball between
bodies.
two flat plates to 0.25 in. (6.35 mm) displacement. Compres-
siveforceto800lb(3560N)issufficient.Ameansofcentering
1
This test method is under the jurisdiction of ASTM Committee F08 on Sports
the test ball so that the vertical axis of the ball aligns with the
Equipment and Facilities and is the direct responsibility of Subcommittee F08.26 on
vertical axis of the compression device piston.
Baseball and Softball Equipment.
CurrenteditionapprovedJune1,2009.PublishedJuly2009.Originallyapproved
6.2 Compression Force Gauge, to measure the compressive
in 1998. Last previous edition approved in 2002 as F1888 – 02. DOI: 10.1520/
load in newtons or pounds. Device must be able to measure at
F1888-09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or least 1000 lb (4448 N).
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.3 Compression-Displacement Gauge, to measure the dis-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. placement at the prescribed level of 0.25 in. (6.35 mm).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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F1888 − 09
6.4 Motor, Drive, and Speed Control, to drive the compres-
...
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:F1888–02 Designation: F 1888 – 09
Standard Test Method for
1
Compression-Displacement of Baseballs and Softballs
This standard is issued under the fixed designation F 1888; 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 Thistestmethoddescribesacomparativemeasurementmethodforbaseballsandsoftballsasdefinedbyastaticcompression
displacement test.
1.2 This test method is based on a slow rate force-displacement measurement.
1.3 This procedure is for baseballs and softballs meeting standards established by the sports’ governing bodies.
NOTE 1—Since the compression-displacement of baseballs and softballs can influence the performance characteristics, this test provides a simple
method to compare and categorize such balls based on force levels in a standardized compression-displacement test.
1.4
1.4 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.
1.5 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 determine the applicability of regulatory
limitations prior to use.
2. Terminology Referenced Documents
2
2.1 ASTM Standards:
E 177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E 691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
2.1.1
3.1.1 baseballs and softballs, n—any such ball defined by the rules of the game as published by the sports’ governing bodies.
2.1.2
3.1.2 compression-displacement, n—the reduction in ball diameter under a specified compressive load between two flat plates.
Synonymous with compression-deflection.
2.1.3
3.1.3 force, n—the resistance to displacement. The interaction between test machine and ball during compression.
3.Summary of Test Method
3.1Thebaseballorsoftballisplacedbetweentwoflat-platesurfacesofacompressionmachineandthencompressedtoastandard
displacement of 6.35-mm (0.25-in.). The compression load (force) applied at the standard displacement is recorded.
3.1.4 four seams, n—plane passing through the middle of the ball intersecting four stitch lines.
3.1.5 two seams, n—plane passing through the middle of the ball intersecting two stitch lines.
4. Significance and Use
4.1The static compression-displacement of a baseball or softball is a mechanical property which can correlate to dynamic
properties.
1
This test method is under the jurisdiction of ASTM Committee F08 on Sports Equipment and Facilities and is the direct responsibility of Subcommittee F08.26 on
Baseball and Softball Equipment and Facilities.
Current edition approved Dec. 10, 2002. Published January 2003. Originally approved in 1998. Last previous edition approved in 1998 as F1888–98.on Baseball and
Softball Equipment.
Current edition approved June 1, 2009. Published July 2009. Originally approved in 1998. Last previous edition approved in 2002 as F 1888 – 02.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
F1888–09
4.2This test method is suitable for obtaining data in research and development, quality control, and classifying balls by the
compression-displacement.
4.3Sportsassociationscanusecompression-displacementstandardsinspecificationsforofficialbaseballsandsoftballsstandards
in specifications for official baseballs and softballs for purposes of consistency of performance.
4.4This same test procedure can be utilized with other compressive forces and the specified force is not necessarily the same
as experienced in actual use. Summary of Test Method
4.1 The baseball or softball is placed between two flat-plate surfaces of a compression machine and then compressed to a
standar
...
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