This ASTM F2398 moment of inertia and center of percussion test method of baseball softball bat determines the moment of inertia (MOI), the center of percussion (COP), and the balance point (BP) of baseball and softball bats. This ASTM F2398 specification emphasize specifically on weight, balance point, center of percussion, and MOI, in support of other test methods including the ASTM standards referenced in this document. This ASTM F2398 test method offers a laboratory means to measure the inertial properties of bats.

Use of this ASTM F2398 test method can provide sports governing bodies the means to establish rules regarding the physical properties of bats, specifically MOI. These physical properties generated from the ASTM F2398 specification are used in Test Method F1881, Test Method F1890, and Test Methods F2219. The MOI, COP, and BP are measured in the laboratory on test equipment meeting the requirements defined in this ASTM F2398 test method.

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