Full Tooth vs Partial Profile Thread Mills: How to Choose for HRC65 Hardened Steel
Last month, we received an urgent call from a precision mold shop in Stuttgart, Germany. They were breaking tools on the final M4×0.7 blind holes of an S136 mirror-finish mold insert hardened to HRC64–65. With production halted and tens of thousands of dollars in parts at risk, their shop manager was frustrated. They had always
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