DIN 51222 — Pendulum impact testing machines (≤ 50 J) requirements and verification

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DIN 51222 sets particular requirements and verification expectations for pendulum impact testing machines with a nominal energy of 50 J or less, used for notched impact bending tests. Lower-energy machines need tighter attention to friction and geometry, which this standard addresses. To verify or specify a low-energy impact machine, talk with our team.

What DIN 51222 Covers

The standard defines the machine requirements and checks that matter most at low impact energies, where friction and windage losses and small geometric errors have a proportionally larger effect on the measured absorbed energy.

Why Low-Energy Machines Need Special Attention

At 50 J and below, the same absolute error in energy loss represents a larger relative error in the result. DIN 51222 tightens the verification of pendulum geometry, bearing friction, and the energy-indicating system so that low-energy impact data stays reliable.

Reading the Designation

Cited as DIN 51222 with its edition year. Confirm the edition and whether a European (DIN EN ISO 148-2) verification is also required for your scope.

Related Standards

DIN EN ISO 148-2 and ISO 148-2 are the broader Charpy machine-verification standards, and ISO 148-3 covers reference test pieces.

Request a Quote

Need a low-energy pendulum impact machine verified or supplied? Request a quote and our team will help you build a system matched to your impact energy range and verification needs.

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Configure your DIN 51222 setup with TensileMill CNC

Adding capacity or replacing older equipment? TensileMill CNC can support your DIN 51222 program. Our range includes load cells, alignment hardware, and the reference setups used for machine and extensometer verification. Tell us your materials, specimen forms, and required test sections, and our team will match the right configuration.