Machining hardened steel is one of the most demanding challenges in modern CNC manufacturing. Industries such as automotive, aerospace, mold making, and precision machinery frequently work with hardened materials that require high dimensional accuracy and excellent surface quality. However, one common problem manufacturers continue to face is rapid cutting tool wear. To address these issues, many manufacturers are turning to CBN inserts as a high-performance solution for hardened steel machining.

Thread tapping is a critical process in CNC machining, especially in industries such as automotive, mold making, aerospace, and precision components. However, one of the most common and frustrating issues manufacturers face is spiral tap breakage during machining.

In modern machining industries such as heavy machinery, mold manufacturing, automotive components, and structural equipment, large-diameter hole machining is a common requirement. However, as the hole size increases, the machining process often becomes more challenging due to higher cutting forces, faster tool wear, and longer machining cycles.

In CNC machining and mold manufacturing, tapping is often treated as a routine process—until the material changes. Once you start tapping quenched and tempered steel or mold steel in the 25–45 HRC range, common problems quickly arise: broken taps, unstable thread quality, rapid tool wear, and unpredictable tool life.

Threading is one of the most critical operations in CNC turning. Whether machining internal threads for hydraulic components or external threads for shafts and fasteners, the choice of threading inserts directly affects thread accuracy, surface finish, tool life, and overall production efficiency.