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ASTM F1888-98

(Test Method)

Test Method for Compression-Displacement of Baseballs and Softballs

Test Method for Compression-Displacement of Baseballs and Softballs

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 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.

General Information

Status
Historical
Publication Date
09-Jun-1998
ICS
97.220.40 - Outdoor and water sports equipment
Technical Committee
F08 - Sports Equipment, Playing Surfaces, and Facilities
Drafting Committee
F08.26 - Baseball and Softball Equipment
Current Stage
Ref Project

Relations

Replaced By
ASTM F1888-02 - Test Method for Compression-Displacement of Baseballs and Softballs
Effective Date
10-Dec-2002

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ASTM F1888-98 - Test Method for Compression-Displacement of Baseballs and Softballs
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: F 1888 – 98
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope standard displacement of 6.35-mm (0.25-in.). The compression
load (force) applied at the standard displacement is recorded.
1.1 This test method describes a comparative measurement
method for baseballs and softballs as defined by a static
5. Significance and Use
compression displacement test.
5.1 The static compression-displacement of a baseball or
1.2 This test method is based on a slow rate force-
softball is a mechanical property which can correlate to
displacement measurement.
dynamic properties.
1.3 This procedure is for baseballs and softballs meeting
5.2 This test method is suitable for obtaining data in
standards established by the sports’ governing bodies.
research and development, quality control, and classifying
NOTE 1—Since the compression-displacement of baseballs and soft-
balls by the compression-displacement.
balls can influence the performance characteristics, this test provides a
5.3 Sports associations can use compression-displacement
simple method to compare and categorize such balls based on force levels
standards in specifications for official baseballs and softballs
in a standardized compression-displacement test.
standards in specifications for official baseballs and softballs
1.4 This standard does not purport to address all of the
for purposes of consistency of performance.
safety concerns, if any, associated with its use. It is the
5.4 This same test procedure can be utilized with other
responsibility of the user of this standard to establish appro-
compressive forces and the specified force is not necessarily
priate safety and health practices and determine the applica-
the same as experienced in actual use.
bility of regulatory limitations prior to use.
6. Apparatus
2. Referenced Documents
6.1 Compression Device, to compress the test ball between
2.1 ASTM Standards:
two flat plates to 6.35 mm (0.25 in.) displacement. Compres-
D 1054 Test Method for Rubber Property—Resilience Us-
sive force to 1112 N (250 lb) is sufficient. A means of centering
2
ing a Rebound Pendulum
the test ball so that the vertical axis of the ball aligns with the
F 1887 Test Method for Determining the Coefficient of
vertical axis of the compression device piston.
3
Restitution (COR) of a Softball
6.2 Compression Force Gage, to measure the compressive
load in newtons or pounds.
3. Terminology
6.3 Compression-Displacement Gage, to measure the dis-
3.1 Definitions of Terms Specific to This Standard:
placement at the prescribed level of 6.35 mm (0.25 in.).
3.1.1 baseballs and softballs, n—any such ball defined by
6.4 Motor, Drive, and Speed Control, to drive the compres-
the rules of the game as published by the sports’ governing
sion device to 6.35 mm (0.25 in.) displacement in a time of 12
bodies.
to 15 s.
3.1.2 compression-displacement, n—the reduction in ball
diameter under a specified compressive load between two
...

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