HRC65 Thread Milling Strategy for Precision Mold and Die Machining
Late last year, we were called to troubleshoot a tooling crisis at a German precision mold shop. The team was threading a powder-metallurgy steel insert hardened to HRC 64–65.5. The part had already undergone dozens of hours of EDM, finish milling, and vacuum heat treatment. A shop floor technician attempted to tap an 18 mm
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