Hwacheon Hi-TECH 550

The Hwacheon Hi-TECH 550 is a heavy-duty lathe for long work: Ø590 mm (Ø23.2 in) maximum turning diameter over a Ø800 mm (Ø31.5 in) swing, and three beds giving 1,100 mm (43.3 in), 2,100 mm (82.7 in) on the L or 3,200 mm (126.0 in) on the XL of turning length. The spindle is an A2-11 with a Ø132 mm (Ø5.2 in) bore and Ø116 mm (Ø4.6 in) bar capacity, on a Ø180 mm (Ø7.1 in) front bearing, driven by a 30 / 22 kW (40.2 / 29.5 hp) motor.

The 550A takes a 15 in chuck and the 550B an 18 in chuck. Top speed is 2,000 rpm on the turning version and 1,800 rpm on the MC. A bore of Ø132 mm lets large tube and bar pass through the headstock, while the long beds take shafts that a standard machine cannot hold between centres. The tailstock has a Ø120 mm (Ø4.7 in) cylinder with 150 mm (5.9 in) of quill travel and an MT #5 taper, and the tailstock itself travels 980 mm (38.6 in), 1,980 mm (78.0 in) on the L or 3,080 mm (121.3 in) on the XL.

The turret has 10 stations as standard, with 12 as an option, and the MC version has 12. It indexes at 0.2 sec/step and takes □32 mm shanks and Ø60 mm boring bars. On the MC, live tools run at 7.5 / 5.5 kW (10.1 / 7.4 hp) up to 4,000 rpm with Ø32 mm end mills in ER 40 collets, and C indexes in 0.0001° steps. That is enough for keyways, flats and cross holes on large shafts.

X and Z rapid at 20 m/min (787 ipm) and 24 m/min (945 ipm), with 345 mm (13.6 in) of X and 1,150 mm (45.3 in), 2,150 mm (84.6 in) or 3,250 mm (128.0 in) of Z. Feed motors are 4 / 4 kW on X and Z, with Z rising to 7 kW on the L and XL beds. For larger bar, the Hi-TECH 550BB moves to an A2-15 nose, a Ø195 mm (Ø7.7 in) bore and Ø190 mm (Ø7.5 in) bar at 1,000 rpm on the same turning lengths. The machine needs 65 kVA and measures 4,590 x 2,450 x 2,400 mm (180.7 x 96.5 x 94.5 in) on the standard bed, up to 6,890 x 2,600 x 2,660 mm (271.3 x 102.4 x 104.7 in) on the XL. The control is a Fanuc 0i-TF Plus.