ASTM F1888-09(2014)
(Test Method)Standard Test Method for Compression-Displacement of Baseballs and Softballs
Standard Test Method for Compression-Displacement of Baseballs and Softballs
SIGNIFICANCE AND USE
5.1 The static compression-displacement of a baseball or softball is a mechanical property which can correlate to dynamic properties.
5.2 This test method is suitable for obtaining data in research and development, quality control, and classifying balls by the compression-displacement.
5.3 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.
5.4 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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Standards Content (Sample)
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Designation: F1888 − 09(Reapproved 2014) An American National Standard
Standard Test Method for
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.
2.1 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
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, Playing Surfaces, and Facilities and is the direct responsibility of
vertical axis of the compression device piston.
Subcommittee F08.26 on Baseball and Softball Equipment.
Current edition approved March 1, 2014. Published April 2014. Originally
6.2 Compression Force Gauge, to measure the compressive
approved in 1998. Last previous edition approved in 2009 as F1888 – 09. DOI:
load in newtons or pounds. Device must be able to measure at
10.1520/F1888-09R14.
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).
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F1888 − 09 (2014)
6.4 Motor, Drive, and Speed Control, to drive the compres- 10. Report
sion device to 0.25 in. (6.35 mm) displacement in a time of 12
10.1 Report the following information:
to 18 s at a constant rate.
10.1.1 Name of the test facility and test operator,
10.1.2 Test date,
6.5 A Steel Tape, 0.25 in. (6.35 mm) wide, suitable for
10.1.3 Hourly measurements of test conditions, including:
measuring lengths to the nearest 0.0625 in. (1.5875 mm).
10.1.3.1 Relative humidity and temperature of the ball
conditioning and test room environments,
7. Conditioning
10.1.3.2 Number of hours ball was in conditioning environ-
7.1 Ball Conditioning and Test Room Conditions:
ment.
7.1.1 Test balls shall be stored in an environmentally
10.1.4 Test equipment used for this test method,
controlled space for at least 14 days immediately before
10.1.5 Test ball information, model, weight test
...
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