SAMHO

Last month, a long-standing North American precision mold manufacturer reached out to us in a panic. Their CNC programmers were hitting a wall while machining a batch of Cr12MoV mold steel hardened to HRC62. Due to the extreme hardness, standard drill bits emitted a piercing screech and failed after fewer than two holes, suffering catastrophic

Last month, a long-standing automotive client in the US Midwest sent us an urgent email. While using our tungsten carbide drill bits for metal to drill quenched-and-tempered 4140 steel (HRC 32–35), their tool life suddenly plummeted. A process normally stable at 800 holes crashed completely, with some drills suffering catastrophic failures inside the hole after

Last month, a long-standing Tier 1 automotive mold client from North America reached out for urgent assistance. Their CNC machining center was rushing to produce a batch of D2 mold steel inserts heat-treated to HRC62. Due to an engineering change, they needed to urgently drill a series of deep holes into these hardened workpieces. The

Last week, an Ohio client sent us a package of over a dozen scrapped solid carbide drill bits. They were machining 314 stainless steel manifolds, and bits rated for 200 holes were frequently chipping or snapping by the 30th hole without warning, forcing frequent CNC shutdowns and wrecking their production schedule. This scenario is all

Last week, a German client specializing in heavy-duty vehicle chassis components reached out to us. Their CNC machining unit was processing a batch of 12mm-thick Q355B steel plates using 14mm HSS drill bits. While the drilling went smoothly, the thick, hardened extrusion burrs formed at the hole exits forced them to add a costly manual

“Out of every ten Western shops that come to us for custom solid carbide drills, at least seven shatter the tool inside the hole during the first few passes. This happens simply because their parameters are either too conservative or too aggressive.” As a cutting tool manufacturer with 15 years of shop-floor technical support, this