Hardinge Inc. is introducing two Bridgeport “five-face” vertical machining centers – the GX 250 5F and GXR 320 5F — “4+1 axis” machines designed to achieve maximum capacity and performance for job shops or OEM, and processing parts for aerospace, medical, electronic, defense, automotive, power generation industries, and many other manufacturing sectors.

The New York-based machine tool designer and builder specializes in precision CNC lathes, machining centers, high-end cylindrical and jig grindingmachines, and advanced workholdingand rotary products.

Both new GX machines are manufactured to highest industry standards and incorporate features that exceed the demanding requirements of the current metal-cutting market. Two machine sizes are available, and supplied with a standard, and sophisticated, but user-friendly, Fanuc 0i-D control for 4+1 machining.  

4+1 describes the design strategy for using four simultaneous axes, plus one axis that is used for positioning only.  4+1 or five-face machining is an advance from three-axis machining, wherein one or two sides of a part are machined per setup: 4+1 machining allows the part to be machined on five faces in a single set-up. The part remains in one fixture instead of being moved from one fixture or vise to another, drastically reducing setup time while improving accuracy.

Hardinge also offers a full five-axis VMC for machining complex contoured parts, like impellers and turbines, where five simultaneous axis movements are required.

The GX 250 5F (4+1) with travels of 11.8 x 15.6 x 16.9 in. (X, Y, Z) provides rapid traverse of 1,181 inches per minute on X, Y and Z axes, and features a 20-hp, 15,000-rpm direct-drive spindle motor with 70.4 ft-lb. of torque, and a 30-tool swing-arm automatic tool changer.

The larger GXR 320 5F (4+1) with travels of 20 x 24 x 20 in. (X, Y, Z) provides very rapid traverse of 1,693 inches per minute on X and Y axes, and 1,417 inches per minute on the Z axis. The machine features a powerful 25hp, 12,000-rpm direct-drive spindle with 86.3 ft-lb. of torque and a 48-tool swing-arm automatic tool changer.