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Haas Big-Bore turning centres for heavy-duty machining

Editor: Barbara Schulz

Belgium – For companies that want to turn bigger diameter bar but do not have the space for a larger-footprint lathe, Haas Automation now offers a complete line of heavy-duty Big-Bore turning centres.

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Haas Automation’s ST Big Bore CNC lathes are made for serious machining operations.
Haas Automation’s ST Big Bore CNC lathes are made for serious machining operations.
(Source: Haas)

According to Haas, six Big-Bore models are available, with maximum capacities from 381 mm x 533 mm for the ST-25 to 648 mm x 2,032 mm for the large-frame ST-45L, and two models with Y-axis capabilities.

Machining with vision, driven by technology

For machines designed to accommodate large diameter parts, Haas ST lathes are based on extremely rigid, heavy-duty, cast iron bases, designed using finite element analysis (FEA) and endowed with reinforcement ribs, to give reliable accuracy and repeatability when taking heavy cut after heavy cut, the machine tool builder said. It added that each Big-Bore spindle head features a compact, symmetrical design for thermal stability and rigidity.

The Haas ST-25 has a maximum capacity of 381 mm x 533 mm, with a 806 mm swing over the front apron. The machine’s A2-6 spindle has a 76 mm bar capacity, and is equipped with a 254 mm hydraulic chuck, Haas said. The spindle is powered by a 22.4 kW vector drive system, and turns to 3,400 rpm. A 12-station bolt-on style turret is said to be standard.

The larger model, the ST-45 turning centre features a maximum capacity of 648 mm x 1118 mm, with a 876 mm maximum swing over the front apron. The machine’s A2-11 spindle has a 178 mm bore, and accepts an optional 457 mm hydraulic chuck. The spindle is powered by a 29.8 kW vector drive system with up to 1400 rpm. The ST-45L is a long-bed version of the ST-45, with a maximum capacity of 648 mm x 203 2mm for nearly double the turning length. The ST-45L comes standard with a servo-driven tailstock, Haas said.

Standard equipment on all Haas Big-Bore turning centres includes rigid tapping, a 15" colour LCD monitor, and USB connectivity. Haas added that available options include a belt-type chip conveyor, hydraulic tailstock, automatic tool probe, an automatic parts catcher, high-pressure coolant systems, and more.

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