Compact, Big-Bore Turning Center Provides 2.5" Bar Capacity

Haas Automation has expanded its line of big-bore turning centers with the smaller ST-15 model designed to provide more bar capacity without the space requirements of a larger-footprint lathe. The turning center’s A2-6 spindle nose has a 3.5" (88.9-mm) bore and a 2.5" (63.5-mm) bar capacity. The machine offers a maximum cutting capacity of 14" × 16" (356 × 406 mm), with a swing of 16" (406 mm) over the cross-slide. It is equipped with an 8.3" (210-mm) hydraulic three-jaw chuck and a 12-station BOT turret.

The 20-hp (14.9-kW) vector dual-drive spindle turns at speeds ranging to 4,000 rpm and provides 150 foot-pounds (203 Nm) of torque. On-the-fly wye-delta switching yields a wide constant-horsepower band for constant surface-feed cuts, and rapid traverse rates of 1,200-ipm (30.5-m/min.) along with fast turret indexing help to reduce cycle times.

The turning center is said to be rigid, highly accurate and thermally stable. The spindle head features a compact, symmetrical design for thermal stability and rigidity, and the 45-degree wedge design increases the tool-mounting envelope and improves chip flow. Additional machine features include rigid tapping, a 15" color LCD monitor and a USB port. Available high-productivity options include a belt-type chip conveyor, a tailstock with hydraulic quill, an automatic tool probe, high-pressure coolant systems and more.