Hwacheon C2

The Hwacheon C2 is the larger of the two C-series turn-mills: an 8 in chuck (10 in optional) on an A2-6 nose, Ø65 mm (Ø2.6 in) bar through a Ø76 mm (Ø3.0 in) bore, and a main spindle rated 15 / 11 kW (20 / 15 HP) that runs to 5,000 rpm. It turns up to Ø630 mm (Ø24.8 in) over a Ø730 mm (Ø28.7 in) swing and up to 557 mm (21.9 in) long.

The two versions pull the machine in different directions. The YMC carries a tailstock with a Ø80 mm (Ø3.1 in) quill, 705 mm (27.8 in) of travel and an MT #5 centre, for chucked and centre-supported work at the full chuck size. The YSMC carries a sub-spindle that is much smaller than the main one: A2-5 nose, 6 in chuck, 6,000 rpm and 7.5 / 5.5 kW (10 / 7.4 HP), with a Ø38 mm (Ø1.5 in) bore and Ø29 mm (Ø1.1 in) bar capacity. It suits flanges and hubs gripped on a smaller diameter for second-side work, but bar thicker than Ø29 mm cannot pass through it. On the sub-spindle the turning envelope is Ø510 mm (Ø20.1 in) by 569 mm (22.4 in).

Milling comes from an 18-station turret (BMT 55, or CAPTO C4 with BMT 55) indexing at 0.467 s/step, a 12-tool CAPTO C4 magazine and driven tools running to 4,000 rpm on 5.5 / 3.7 kW (7.4 / 5 HP). X travel is 360 mm (14.2 in), Z 700 mm (27.6 in) and Y ±60 mm (±2.4 in), and the C axis indexes in 0.0001° steps. Magazine tools may be 150 mm (5.9 in) long in X, which leaves room for longer drills across the part.

The Hwacheon C1 runs a 6 in chuck to 6,000 rpm with Ø51 mm (Ø2.0 in) bar and 11 / 7.5 kW (15 / 10 HP); the C2 gives up that speed for chuck size, bar capacity and power. A part catcher handles parts up to Ø450 mm (Ø17.7 in). Plan for 55 kVA, a 230 L coolant tank, 3,610 x 2,784 mm (142.1 x 109.6 in) of floor and 2,360 mm (92.9 in) of height; the machine weighs 10,800 kgf (23,810 lb) and runs Fanuc 0i-TF Plus.