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The two-machine Tongtai VTX Series fixed column, moving table CNC milling and tapping centers is engineered for high volume, high precision machining.

X, Y, and Z axis travels are 20″ x 15.7″ x 11.8″ (508 mm x 398 mm x 300 mm) for the VTX-5 machine, and 28″ x 15.7″ x 11.8″ (711 mm x 398 mm x 300 mm) for the larger VTX-7. Heavy Meehanite castings provide a rigid and stable machining platform.

The machines feature roller-type linear slideways to maximize rigidity and control machine motion. Class 3, 25mm (1″)-dia. ballscrews with a double nut pre-loaded design permit a standard rapid traverse rate of 2,362 ipm (60 m/min) for all axes and acceleration of 1.2G. An APS (Absolute Pulse Coder) servo system enables the machine to be started from any position.

VTX machines are equipped with either a 21 tool turret-type or 20 tool arm-type automatic tool changing system. With the 21-station changer, change times are 1.4 seconds tool to tool and 1.9 seconds chip to chip. The 20-tool high-speed arm-type changer reduces tool change times to 0.8 seconds and 1.3 seconds chip to chip.

The machines’ standard 7.5 hp, 12,000 RPM direct drive spindle provides rigid tap speeds up to 6,000 rpm. An optional 24,000 rpm direct drive spindle delivers high cutting speeds for aluminum and magnesium parts as well as graphite. A BBT-30 (Big Plus dual-contact) taper is standard for rigid milling. Through-spindle coolant capability is standard, as is a spindle chiller. The machines’ bed flushing system provides efficient chip removal.

The standard Mitsubishi M80A control features a 10.4″ (265 mm) touch screen with intuitive smart phone type operation and is suitable for a wide range of applications from production to high speed machining applications.