Fresatura della filettatura interna HRC65: selezione degli utensili e strategie di lavorazione
Last winter, a long-standing client in Stuttgart reached out with an urgent problem. They needed to add four M6 internal threaded holes to a D2 stamping die insert. The block was already vacuum-hardened to HRC64–65. The operator tried to tap the holes with a standard carbide tap, but it snapped after engaging just two threads.