• CNC Servicing & Solutions India Private Limited (Haas Automation)

Big-Bore Turning Centres

Haas Automation India Pvt Ltd has introduced a line of new, heavy-duty Big-Bore Turning Centres for companies that want to turn bigger diameter bar but do have the space for a larger-footprint lathe. Each of these versatile turning centres offers more power, a larger chuck, and greater bar capacity – without having to step up to the next larger machine. Six big-bore models are available, with maximum capacities from 305 x 533 mm for the compact ST-25 to 648 x 2032 mm for the large-frame ST-45L, and two models with Y-axis capabilities. Critically, 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. Each big-bore spindle head features a compact, symmetrical design for thermal stability and rigidity, and a 45-degree wedge design greatly increases the tool-mounting envelope and improves chip flow. The Haas ST-25 has a maximum capacity of 381 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. The spindle is powered by a 22.4 kW vector drive system, and turns to 3400 rpm. A 12-station bolt-on style turret is standard. Standard equipment on all Haas big-bore turning centres includes rigid tapping, a 15" colour LCD monitor, and USB connectivity. Available options include a belt-type chip conveyor, hydraulic tailstock, automatic tool probe, an automatic parts catcher, high-pressure coolant systems, and much more. As with the Haas Automation DS dual spindle CNC lathes, the new ST machines benefit from many, productivity enhancing feature upgrades, including greater tool clamping force, quicker indexing, and increased C-axis torque (for machines equipped with optional live tooling), compared to previous models.