KAAST V-Turn 550

The KAAST V-Turn 550 appears on KAAST's vertical lathe page, and its figures describe a chucker for short, wide parts: a maximum turning diameter of Ø550 mm (21.7 in), a maximum turning height of 550 mm (21.7 in) and a maximum swing of Ø750 mm (29.5 in). It runs under the FANUC 0i-TF control.

On a vertical lathe the part sits in the chuck under its own weight, which is why the layout is chosen for discs, flanges, hubs and rings that are awkward to load sideways. The chuck is 12 in, with 15 in as an option, on an A2-8 nose, and the spindle bearing is Ø130 mm (5.1 in) in diameter. Note the gap between the turning diameter and the standard chuck. Parts near the limit overhang a 12 in chuck by a wide margin, so plan the jaws carefully or order the larger chuck.

The spindle runs from 50 to 2,500 rpm on 18.5 kW (25 hp). On a machine like this the low end of the range matters more than the top, since large diameters reach cutting speed at low rpm. No torque figure or gear range appears in the listed figures, so ask for the torque curve if the work is heavy roughing at large diameter.

X travel is listed as -20/+275 mm (-0.8/+10.8 in), so the tool can pass 20 mm beyond the spindle centerline, and Z travel is 550 mm (21.7 in). Rapids are 20 m/min (780 in/min) in X and 24 m/min (945 in/min) in Z. The turret has 12 stations and takes Ø25/40 mm (1/1.6 in) tool shanks. No live tooling row is listed.

It is a tall machine on a small floor area: 1,850 x 3,000 mm (72.8 x 118 in) and 3,060 mm (120 in) high, at 5,300 kg (11,660 lb). Check door and ceiling clearance before it ships.