October 27, 2026

While machining double-cryogenically tempered SKD11 stamping die inserts, a long-time client called us with a critical issue. They were milling M4×0.7 blind-hole threads in stable HRC65 steel. Their solid carbide tool suffered a brittle fracture near the shank root before completing even two full revolutions. The snapped tool jammed deep inside the cavity, putting an