HANKOOK PROTEC-7NB HORIZONTAL MACHINING CENTER

The HANKOOK PROTEC-7NB is a horizontal machining center engineered for heavy-duty turning and boring operations. It features a single main spindle with a maximum turning diameter of 28 inches and extended turning length capacity of 157.5 inches, accommodating large workpieces typical in aerospace, automotive, and industrial applications. The spindle utilizes a 12-inch chuck diameter with a maximum swing of 28 inches, delivering 20 horsepower at 1,000 RPM, providing substantial torque for demanding cutting operations. The machine operates with two axes of CNC control—X and Z—utilizing a slide-type primary tool carrier that indexes a single cutting tool per operation. The X-axis provides 15.9 inches of travel with feed rates and rapid traverse speeds of 120 inches per minute, while the Z-axis offers 36.8 inches of travel at matching feed and rapid traverse capabilities. This configuration enables precise axial and radial positioning for complex bore and turn work. The machine's architecture prioritizes rigidity and thermal stability, critical for maintaining tolerances during extended heavy cutting cycles. With its combination of substantial spindle power, generous workpiece capacity, and controlled feed rates, the PROTEC-7NB is suited for production runs requiring consistent accuracy on large cylindrical and complex-geometry components. The 1,000 RPM spindle speed emphasizes torque delivery over speed, making it particularly effective for interrupted cuts and difficult-to-machine materials.