The specified distances from the axis of support to the center of percussion for the Class J – Charpy and Izod Automatic Impact Testing System are as follows:

ISO 179, GB/T 1043:

• For impact energies ≤5J: The distance from the axis of support to the center of percussion is 230mm.
• For impact energies >5J: The distance from the axis of support to the center of percussion is 395mm.

ASTM D6110:

• The distance from the axis of support to the center of percussion is 327mm.

The distance from the axis of support to the center of percussion is a critical parameter in impact testing. It represents the effective lever arm length, which influences the moment of inertia and the energy transferred to the specimen during impact. Different standards may specify different distances to ensure consistent and reliable test results.

The Class J – Charpy and Izod Automatic Impact Testing System offers the capability to adjust the distance from the axis of support to the center of percussion based on the specific requirements of ISO 179, GB/T 1043, and ASTM D6110 standards, enabling accurate and standardized impact testing procedures.

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