Tongtai Five-Axis Machining in a Small Footprint

Originally titled 'Five-Axis Machining in a Small Footprint'

The column of the CT-350 has a span making it torsion-resistant, while cutting a five-axis part.

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The CT-350 five-axis VMC from Tongtai features a small footprint with a “C” frame-type machine and was designed around high level mold-type machining centers to ensure rigidity during cutting. The column of the CT-350 has a span making it torsion-resistant, while cutting a five-axis part. Rigidity is enhanced by using 45-mm roller type guideways and pre-tensioned, large-diameter ballscrews.

The CT-350’s table size is 13.78” diameter and can handle a maximum load of 440 lbs. The integrated rotary table uses the roller gear cam in both the tilt and rotation axes. The roller gear cam design provides zero backlash, high rigidity and fast rotation speeds. The stroke on this machine is 15.75” in X, 20.08”, in Y and 20.08” in Z. The A-axis stroke is +30-degrees through -120 degrees, and the C-axis stroke is 360 degrees with rotation speeds of 40 rpm and 33 rpm, respectively. The CT-350 is truly high performance with rapid feed rates of 1,418 ipm in X and Y, and 1,182 ipm in Z. A 20-hp direct-drive 15,000-rpm Big Plus 40 taper spindle with air/oil mist lubrication is standard in the CT-350. However, an optional 20,000-rpm integral spindle is also available. For enhanced productivity, the standard 24-position arm type tool changer is equipped with a roller gear cam mechanism to reduce tool change time to only 2 seconds. Larger 30- and 40-tool ATCs are optional.