Hardinge Inc. releases two Bridgeport five-face (4+1) VMCs – the GX 250 5F and GXR 320 5F. These 4+1-axis VMCs are designed to achieve maximum capacity and performance in the job shop, OEM, aerospace, medical, electronic, defense, automotive and power generation industries, as well as many other manufacturing sectors, the company says.
Two machine sizes are available and come standard with a Fanuc 0i-D control for 4+1 machining. The GX 250 5F (4+1) with travels of 11.8” x 15.6” x 16.9” (X,Y,Z) provides fast rapid traverse of 1,181” per minute on X, Y and Z axes and features a 20-hp, 15,000-rpm direct-drive spindle motor with 70.4 foot-pounds of torque and a 30-tool swing-arm automatic toolchanger. The larger GXR 320 5F (4+1), with travels of 20” x 24” x 20” (X,Y,Z), provides rapid traverse of 1,693” per minute on X and Y axes and 1,417” per minute on the Z axis. The machine features a 25-hp, 12,000-rpm direct-drive spindle with 86.3 foot-pounds of torque and a 48-tool swing-arm automatic toolchanger.
Bridgeport five-face (4+1) machining centers feature an integrated five-axis rotary table supported by large bearings to allow heavy horizontal and vertical cutting loads with smooth and accurate rotation at all times. Bridgeport incorporates heavy-duty linear guideways and oversized double-nut ballscrews that are pre-tensioned to provide accuracy and repeatability. The linear way modules consist of slide members (guide trucks) and linear rails to provide a large load rating, stable accuracy, high rigidity and low friction. The spacing between all axes rails provides optimum stiffness for the overall machine structure. Oversized 45-mm (1.77”) ballscrews are featured in the GXR 320 5F, while 32-mm (1.26”) ballscrews are incorporated in the GX 250 5F. All of these features are designed into a small cost-effective footprint.
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