HNK NT-40/50
Key Specifications
table diameter
max swing cutting diameter
max turning height
table speed turning 2 steps
max table load
table drive motor
How much does the HNK NT-40/50 cost?
Price estimate
We do not have a price for the HNK NT-40/50 that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The HNK NT-40/50 turns parts up to 5,000 mm (196.9 in) in diameter on a 4,000 mm (157.5 in) table, and its table motor is given as a single figure: A.C 100 kW (134.1 hp). Smaller NT machines list a pair of ratings. This is the first size where one number stands alone in that row.
Power rises faster than load at this step. The NT-30/40 has A.C 60/75 kW (80.5/100.6 hp) for 30,000 kg (66,138 lb); the NT-40/50 has 100 kW for 50,000 kg (110,229 lb). Table speed halves, though, to about 50 rpm in two steps. A machine like this spends its life on large-diameter roughing and finishing, where the cut is slow and the torque demand is high.
Maximum turning height is 2,500 mm (98.4 in), and the cross rail moves 250 mm (9.8 in) x 7 steps. The ram head travels -200 to +2,750 mm (-7.9 to +108.3 in) in X. As on the NT-30/40, Z travel is a list, 1,300/1,500/2,000/2,200/2,500 mm (51.2/59.1/78.7/86.6/98.4 in), and so is the ram: 300 x 300, 350 x 350 or 400 x 400 mm (11.8 x 11.8, 13.8 x 13.8 or 15.7 x 15.7 in).
Tools have 40 x 40 mm (1.6 x 1.6 in) shanks. The control row shows Fanuc 31i-B and Siemens 840D.
Full Specifications
| Parameter | Value |
|---|---|
| Table Diameter | 4,000 mm (157.5 in) |
| Max Swing Cutting Diameter | 5,000 mm (196.9 in) |
| Max Turning Height | 2,500 mm (98.4 in) |
| Table Speed Turning 2 Steps | Max. ~50 rpm |
| Max Table Load | 50,000 kg (110,229 lb) |
| Table Drive Motor | A.C 100 kW (134.1 hp) (cont/30min) |
| X Axis Travel | -200 ~ +2,750 mm (-7.9 ~ +108.3 in) |
| Z Axis Travel | 1,300/1,500/2,000/2,200/2,500 mm (51.2/59.1/78.7/86.6/98.4 in) |
| Ram Size | 300 x 300/350 x 350/400 x 400 mm (11.8 x 11.8/13.8 x 13.8/15.7 x 15.7 in) |
| Tool Shank Size | 40 x 40 mm (1.6 x 1.6 in) |
| Cross Rail Vertical Travel | 250 mm (9.8 in) x 7 steps |
| CNC Control | Fanuc 31i-B, Siemens 840D |
Specifications sourced from en.hnkkorea.com — verified 2026-10-04
Strengths & Limitations
Strengths
- A.C 100 kW (134.1 hp) table motor
- 50,000 kg (110,229 lb) table load on a 4,000 mm (157.5 in) table
- 5,000 mm (196.9 in) swing and cutting diameter
- Rail moves 250 mm (9.8 in) x 7 steps; Z travel offered up to 2,500 mm (98.4 in)
Limitations
- Table speed of about 50 rpm, half the about 100 rpm of the NT-30/40
- 40 x 40 mm (1.6 x 1.6 in) tool shank on a machine with a 100 kW drive
- Ram section and Z travel are lists, so the catalogue alone does not define the machine
Best For
Frequently Asked Questions
01
HNK lists A.C 100 kW (134.1 hp). The row heading reads cont/30min, but only one figure is printed for this model, so ask whether 100 kW is the continuous or the 30min rating.
02
Up to 5,000 mm (196.9 in) swing and cutting diameter, 2,500 mm (98.4 in) turning height and 50,000 kg (110,229 lb) on the 4,000 mm (157.5 in) table. Turning height is a starred row that HNK will change to order.
03
Maximum speed for turning is about 50 rpm, in two steps. At the full 5,000 mm (196.9 in) diameter that is still a high rim speed, but features near the centre of the table will be cut slowly.
04
It depends on diameter and weight. The NT-30/40 stops at 4,000 mm (157.5 in) of swing and 30,000 kg (66,138 lb). The NT-40/50 adds a metre of swing and takes 50,000 kg (110,229 lb), with the same ram and Z travel lists and the same 40 x 40 mm (1.6 x 1.6 in) shank.
More from HNK
Other CNC Lathes / Turning Centers
Haas ST-35L
Republic Lagun UTC-1840
Sharp STC-80
