1.1 确定棒球和垒球球棒的惯性矩（MOI）、打击中心（COP）和平衡点（BP）的方法。这些物理特性用于测试方法 F1881 ，试验方法 F1890 和试验方法 F2219页 . 1.2 MOI、COP和BP在实验室中，在满足本试验方法规定要求的试验设备上进行测量。 1.3 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本试验方法提供了一种实验室方法来测量蝙蝠的惯性特性，特别是重量、平衡点、冲击中心和MOI，以支持其他试验方法，包括本文件中引用的ASTM标准。 4.2 使用这种测试方法可以为体育管理机构提供方法，以建立有关蝙蝠物理特性的规则，特别是MOI。

1.1 Method for determining the moment of inertia (MOI), the center of percussion (COP), and the balance point (BP) of baseball and softball bats. These physical properties are used in Test Method F1881 , Test Method F1890 , and Test Methods F2219 . 1.2 The MOI, COP, and BP are measured in the laboratory on test equipment meeting the requirements defined in this test method. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 This test method offers a laboratory means to measure the inertial properties of bats, specifically weight, balance point, center of percussion, and MOI, in support of other test methods including the ASTM standards referenced in this document. 4.2 Use of this test method can provide sports governing bodies the means to establish rules regarding the physical properties of bats, specifically MOI.