Sunnen K4125CS Soft Steel Mandrel 1.4375 Inch Shank

Sunnen K4-125CS Soft Steel Mandrel is a K Series honing mandrel designed for use with Sunnen honing machines. It features a steel mandrel with soft shoes, includes a wedge, and a 1.4375-inch shank to fit standard Sunnen tooling interfaces. The K4-125CS designation places it in Sunnen’s K Series soft-steel mandrels, engineered for durability and repeatable bore finishes across a wide range of materials. This model is intended for honing bores in many materials and provides reliable repeatability and smooth bore finishes when used with compatible honing stones and appropriate operating parameters. The wedge and soft shoes support stable stone retention and seating during honing, helping to minimize runout and ensure consistent results, while the compact design weighs about 0.15 lb for easy handling and quick tool changes in production or repair environments.