Hyundai Big Bore CNC Turning Center

Hyundai WIA introduces the L800A Big Bore Heavy Duty CNC Turning Center.  With a 12.5” thru-hole capacity, the L800A is designed for machining large cylindrical parts required in the booming oil and gas industry.  A dual chuck design (one on each end of the spindle) offers superior support of the work piece—especially on long shafts or pipe. Standard capacities include: a 41.3” swing over the bed; a 32.3” swing over the carriage; a maximum turning diameter of 36.2”; a maximum turning length of 65” and a 12.58” spindle bar capacity.

Bed Structure
The 45° slant bed with hardened and ground box ways has been designed using finite element analysis to ensure powerful cutting and agility and is composed of meehanite cast iron to minimize deformation when performing heavy-duty cuts. At a weight of nearly 4,000 lb, the rigid bed is designed to absorb vibration for stable machining. In order to eliminate thermal growth during machining, all axes are driven by high precision, double-nut ball screws. The double pretension design provides positioning and repeatability with virtually no thermal growth. All ball screws are connected directly to the servo drive motors without gears or belts, eliminating backlash.

Geared Head Spindle
The Big Bore spindle bore of 12.58” (320mm) in diameter optimizes cutting efficiency when cutting oil pipeline or other types of pipe. Spindle motor is 60hp with spindle torque rated at 7,045nm.  The Big Bore spindle offers users high material removal rates, highest accuracy and excellent rigidity. It guarantees stability when run at high spindle speeds for high rpm precision machining.

P4-class roller bearings and angular bearings secure excellent stability when heavy-duty cutting.  Ground bearing assembly parts in the spindle and headstock maintain consistent high accuracy. In order to avoid the release of pre-pressure of the spindle bearing due to high speed accel/decel, heavy duty cutting and movement of the chuck cylinder and tension of the belt pulley, a double locking system separates the spindle bearing from the pulley. The 3-step gearbox offers powerful low end torque for heavy cuts as well as high speed rotation for improved surface finish. The L800A Big Bore is configured with a 700rpm spindle for taking deep cuts. The main spindle delivers minimal noise and vibration even at the heaviest cutting, guaranteeing extremely stable machining and minimizing thermal transmission to the main spindle.

Built-in Tail Stock
The L800A Big Bore has an easy to use, programmable built-in tail stock to maintain superior accuracy and tailstock control. Taper: MT6.  Quill diameter: 160mm. Quill travel: 132mm. Tail stock travel: 1,580mm.

Turret
The Hyundai WIA L800A Big Bore has a 12-tool turret. Tool size: OD, 32mm x 32mm, and ID, 80mm. Indexing time: 0.4 seconds/step.   

Hyundai WIA is ideal for the precise cutting of oil field pipe and other applications that demand handling long, cylindrical pipe and tubing in sometimes a remarkably harsh, high production environment.