Designed for continuous production of multiple and different parts from bar stock, including highprecision medical devices, the Model MC 726 MT from Stama America, (Wheaton, IL), the US subsidiary of STAMA Maschinenfabrik GmbH (Schlierbach, Germany) is a five-axis CNC milling/turning center. Its fast-changeover, 60-position tool magazine (HSK-A63) and trunnion swivel assembly enable this VMC to produce even short runs of complex surgical tools, implants, and other medical units efficiently.

In bar-feeding applications, stock is fed directly to the rotating/swiveling trunnion positioning device. Drilling, milling, and turning operations are performed on both vertical and horizontal spindles. Upon completion of the finished piece or piece run, the work is automatically offloaded by a discharge conveyor, and the next program engages.

The machine features vertical spindle speeds to 12,000 rpm, horizontal spindle speeds to 5000 rpm, bar segment capacity to 800 mm in length and 15 to 65-mm diam, X, Y, Z travel of 500 ? 380 ? 360 mm, A axis of 360°, B axis of 180°, rapid 60 m/min traverse, and a compact footprint. An external tool magazine is available that can accommodate as many as 180 positions.

High-torque milling and turning spindles rated at 49 and 56 hp (36.6 and 41.8 kW) respectively enable users to process all the substrates currently used in the medical device and orthopaedic implant markets, including titanium, cobalt chromium, Nitinol, and others. Circle 203