Starrag's STC-MTV Five-Axis Mill-Turns Specialize in Hard Metal Machining

Equipped with 70-hp, geared-head steel spindles and 3,000-psi coolant for integrated turning, Starrag’s STC-MTV five-axis multitasking HMCs are designed for hard metal machining in such sectors as aerospace and oil and gas. The two models, the MTV 1000 and MTV 1250, provide 8,000 rpm with 700 foot-pounds of torque and 4,500 rpm with 1,200 foot-pounds of torque, respectively. The C-axis rotary table offers 500 rpm on the MTV 1000 and 400 rpm on the MTV 1250.

Both models are capable of single-setup milling, boring, drilling, tapping and turning of workpieces made of Ti6AL4V and Ti5553 titanium alloys, nickel-based superalloys and high-alloy steels. The MTV 1250 can handle workpieces weighing 11,000 lbs, with X-, Y- and Z-axis travels measuring 86" × 82" × 74". The MTV 1000 can handle workpieces weighing 6,613 lbs with linear axis travels measuring 67" × 82" × 74". Workpiece diameters can range to 74" on the MTV 1000 and 94" on the MTV 1250. Both machines offer rapid traverse rates of 1,770 ipm. 

The all-geared A-axis spindle drive supports high metal removal rates because the compact 1D head minimizes distance between the spindle nose and A axis, enabling use of short tools and large bearings. The steel worm wheel provides high stiffness and vibration damping. A coated damping disk in the 1D-head, combined with the right parameter settings from the Siemens 840D CNC is said to enable heavy roughing, semi-finishing and finishing during five-axis operation. 

Integrated high-pressure coolant permits highly efficient one-hit turning, the company says. The 30-hp angular automatic milling head eases access to internal surfaces and features, further aiding single-setup operation. The angle head is loaded automatically from the tool magazine, and tools can also be automatically changed into/out of the head.