Thread Mill Feed Per Tooth: Calculation and Optimization for HRC65 Hardened Steel
Two months ago, a machine shop supervisor at a German mold plant sent us a late-night video. They were running two stamping dies made of SKD11/D2 tool steel, vacuum-hardened and double-tempered to HRC65. During M8×1.25 helical interpolation, their solid carbide cutter snapped before finishing the first pitch. The broken tool body was wedged inside a
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