Five-Axis VMC Ensures Rigidity During Cutting

Available from Absolute Machine Tools, the Tongtai CT-350 five-axis vertical machining center is a “C” frame-type machine that the company says was designed around high-level mold-type machining centers to ensure rigidity during cutting.

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Available from Absolute Machine Tools, the Tongtai CT-350 five-axis vertical machining center is a “C” frame-type machine that the company says was designed around high-level mold-type machining centers to ensure rigidity during cutting. The compact VMC’s column has a wide span, making it torsion-resistant while cutting a five-axis part, and rigidity is enhanced by using 45-mm roller-type guideways and pre-tensioned, large-diameter ballscrews.

The machine’s features a 13.78"-diameter table that can handle a maximum load of 440 lbs. The integrated rotary table uses the roller gear cam in both the tilt and rotation axes, and the roller gear cam design provides zero backlash, high rigidity and fast rotation speeds. Stroke is 15.75" in X, 20.08" in Y and 20.08" in Z. A-axis stroke is +30 degrees through -120 degrees, and C-axis stroke is 360 degrees, with rotation speeds of 40 rpm and 33 rpm, respectively.

The VMC offers rapid feed rates of 1,418"/min. in X and Y, and 1,182"/min. in Z. A 20-hp, direct-drive, 15,000-rpm Big Plus 40-taper spindle with air/oil mist lubrication is standard, however an optional 20,000-rpm integral spindle is also available. For enhanced productivity, the standard 24-position arm-type toolchanger is equipped with a roller gear cam mechanism to reduce toolchange time to 2 sec. Larger 30- and 40-tool ATCs are optional.