SAMHO

Last month, a long-standing partner—a precision injection mold shop in Stuttgart, Germany—sent us a video from their shop floor. A 5-axis machining center had triggered an emergency stop with a broken tool fragment wedged at the bottom of a hole. The workpiece was a D2 tool steel mold insert valued at tens of thousands of

Last month, a mold shop in Stuttgart sent a scrapped ejector guide pin to our lab. The part was vacuum-hardened AISI D2 tool steel (1.2379) at 62 HRC with an M16×1.5 external thread. The shop tried single-point threading on a lathe. They shattered three coated inserts in a row. After 14 hours of upstream machining,

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.

Late last year, we were called to troubleshoot a tooling crisis at a German precision mold shop. The team was threading a powder-metallurgy steel insert hardened to HRC 64–65.5. The part had already undergone dozens of hours of EDM, finish milling, and vacuum heat treatment. A shop floor technician attempted to tap an 18 mm

Last month, a German mold-making client emailed us photos of two broken solid carbide thread mills snapped inside blind holes, along with a scrapped powder-metallurgy die insert. The workpiece was vacuum heat-treated cold-work steel hardened to a punishing HRC65. The shop ran standard catalog speeds and feeds. The tool micro-chipped on pass one and sheared

Last month, we assisted an automotive stamping die manufacturer in Stuttgart, Germany, with a critical failure on their shop floor. A set of SKD11 progressive die inserts—valued at over €40,000—failed during the finish-milling of M10×1.5 threads after heat treatment to HRC 60. Less than three seconds after the operator started the cycle on a five-axis

Last month, we troubleshot a recurring failure on a 5-axis vertical machining center at a Tier-1 automotive mold shop in Michigan. The setup was milling M5 internal threads in vacuum heat-treated D2 tool steel at HRC62. By the eighth hole, the tool tips suffered catastrophic fracture. The shop engineer had lowered the cutting speed (Vc)

Last month in Stuttgart, Germany, we troubleshot a severe rework issue on a precision mold insert. The part was made of 1.2379 (D2) tool steel, cryogenically hardened to 65 HRC. The print called for a blind M6×1 internal thread. The shop-floor team faced a brutal bottleneck: their ultra-fine-grain carbide threaded end mill snapped before finishing

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

Last month, we assisted a German automotive mold shop running a batch of SKD11 stamping inserts hardened to HRC 62–64. The operator drilled the pilot hole and loaded a brand-new solid carbide tool for an M6×1.0 internal thread. Halfway through the first helical interpolation pass, a sharp snap echoed across the shop floor. The tool