HRC65 Thread Mill Cutting Parameters: Speeds, Feeds, and Optimization Guide
A few months ago, a tool-and-die customer in Stuttgart called us with an urgent problem. They had snapped two solid-carbide tools back-to-back while machining M6×1.0 blind-hole threads into a 1.2379 (AISI D2) mold insert. The insert was vacuum-hardened to 64–65 HRC with only 18 hours left before final delivery. Sinking the threads via EDM was
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