It depends on the material.volodkovich wrote: ↑Tue Aug 18, 2020 5:02 pm If through-hardened to ~55-60Rc, would the core be too brittle on a cam machined from ductile cast iron?
S7 in the low to mid 50's is a great material for making punches.
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It depends on the material.volodkovich wrote: ↑Tue Aug 18, 2020 5:02 pm If through-hardened to ~55-60Rc, would the core be too brittle on a cam machined from ductile cast iron?