Big Bore CNC Turning Center for Large, Cylindrical Parts

Hyundai Wia’s L800A big bore heavy-duty CNC turning center is designed for machining large, cylindrical parts for the oil and gas industries.

New Product Announcements From: 8/10/2012 Modern Machine Shop

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Hyundai Wia’s L800A big bore heavy-duty CNC turning center features a 12.5" through-hole capacity and is said to be well-suited for machining large, cylindrical parts for the oil and gas industries. A dual-chuck design offers support for the workpiece, especially on long shafts or pipe.

Sandard capacities include a 41.3" swing over the bed, a 32.3" swing over the carriage, a 36.2" maximum turning diameter, a 65" maximum turning length and a 12.58" spindle bar capacity.
The machine’s 45-degree slant bed with hardened and ground boxways is made of Meehanite cast iron is designed to minimize deformation. Weighing nearly 4,000 lbs, the rigid bed absorbs vibration for stable machining, the company says. All axes are driven by high-precision, double-nut ballscrews to avoid thermal growth during machining. All ballscrews are connected directly to the servodrive motors without gears or belts, eliminating backlash. Travel measures 19.7" in the X axis and 66" in the Z and B axes.
A 12.58"- (320-mm) diameter spindle bore is designed to optimize efficiency when cutting oil pipeline or other types of pipe. The 60-hp spindle motor features 7,045 Nm of torque. The spindle offers stability when run at high spindle speeds for high-rpm precision machining. The chuck size is 32" and the spindle nose is A1-20. The center features a 12-tool turret and a programmable built-in tailstock.

P4-class roller and angular bearings increase stability for heavy-duty cutting. Ground bearing assembly parts in the spindle and headstock maintain consistent high accuracy. The three-step gearbox offers low-end torque for heavy cuts as well as high-speed rotation for improved surface finish. The machine is configured with a 700-rpm spindle for taking deep cuts. The main spindle delivers minimal noise and vibration for stable machining and minimal thermal transmission.

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