Large-Through-Bore Haas Turning Centers

Big parts are big business. And today’s shops need large-capacity machines to handle the big jobs commonly found in such industries as oil & gas exploration, alternative energy, mining and aerospace.

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The ST-50 and ST-55 from Haas Automation Inc., are heavy-duty, large-bore turning centers that are extremely rigid, highly accurate and very thermally stable. Both machines offer twin-chuck capability, a high-torque spindle and a large-diameter through-bore, making them ideal for machining heavy pipes and fittings, large couplers and long rollers.

Turret: 12-Station Bolt-On Tool Turret, 184mm thick, accepts split boring-bar holders and 32mm turning sticks.

The ST-50 and ST-55 both have a maximum cutting capacity of 648 x 2032mm, with swings of 876mm over the front apron and 648mm over the cross slide.

In cooperation with their partners, they have developed a method that breaks down total energy consumption appliance by appliance using a single, high-tech electric meter.

The ST-50 features front and rear A2-15 spindle noses, with an 216mm through-bore, while the ST-55 features front and rear A1- 20 spindle noses, with a massive 318mm through-bore. Both machines accept a variety of aftermarket large-diameter manual and pneumatic chucks, and an air-chuck-ready provision is available.

Each machine’s massive spindle is powered by a 41 kW vector dual-drive system through a Haas-built two-speed gearbox to provide 5762 Nm of torque in low gear. High gear provides a maximum spindle speed of 1000rpm. A servo-driven tailstock (MT6 taper) is standard, and a steady rest provision is available for additional support of long shafts.

360 liter Coolant Tank with 0.6 kW pump, 19.9 L/min @ 2 bar.

Both the ST-50 and ST-55 come equipped with a massive hydraulically clamped 12-station bolt-on style tool turret that accepts 184mm split boring bar holders, as well as standard BOT toolholders. Standard equipment includes rigid tapping, a color remote jog handle, a 381mm color LCD monitor, and built-in USB connectivity. Available high-productivity options include a belt-type chip conveyor, high-pressure coolant systems and much more.

To tackle the types of jobs common in oilfield work, the ST-50 and ST-55 are available with Haas Automation’s proprietary Intuitive Programming System, which includes powerful built-in threading and rethreading cycles for both straight and tapered threads – something found on no other machine.

The Haas fully programmable servo driven tailstock can be activated via the part program, or controlled directly with the standard foot switch. Closed-loop positioning allows you to stop the tailstock anywhere along its travel. Compact, robust castings provide superior rigidity and a proprietary quill design damps vibration. The tailstock features an MT6 taper and provides up to 20 017 N of thrust.

The machines also feature a heavy sheet metal enclosure that provides complete protection from chips and coolant during machining. A pair of wide sliding doors provides unobstructed access to the front chuck and main work area, both from the front and the top, allowing easy overhead loading.

The rear chuck area of each machine is fully enclosed during machining, but has a wide sliding door and swinging end panel to provide complete access from the front and top, simplifying chuck installation and adjustment and making it easy to load pipe using an overhead crane. Unlike some competing machines, it’s not necessary to remove sheet metal panels or modify the enclosure to handle drill pipe.

For more information, please contact Haas Factory Outlet – Tel: (011) 974-2301.


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