High accuracy at high energy comes from a combination of structural stability, precisely machined components and controlled motion. The dual-column frame provides rigidity so the pendulum swings along the intended path without unwanted flex or distortion, even at 750 J. The heavy cast iron base absorbs impact shock and reduces external vibration, which helps maintain a consistent starting angle and impact geometry.

The servo-motor lift raises the pendulum smoothly to the exact preset angle, giving each test the same initial potential energy. The electromagnetic lock ensures that the pendulum is fully secured until the controlled release, removing operator influence. The bearings in the striker assembly are high precision, which minimizes friction and energy loss during the swing.

For instrumented units, the integrated force transducer captures clean, high-resolution force data so the software can verify the mechanical performance of each strike. Together, these factors allow the Class H to deliver stable, repeatable measurements at the highest energies used in Charpy impact testing.

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