HNK VTC-40/50
Image: en.hnkkorea.com, HNK
Key Specifications
table diameter
max swing cutting diameter
max turning height
table speed turning 2 steps
max table load
c axis table speed
How much does the HNK VTC-40/50 cost?
Price estimate
We do not have a price for the HNK VTC-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
There is a wide gap between the two motors on the HNK VTC-40/50. The table drive is A.C 100 kW (134.1 hp). The milling spindle motor is A.C 22/26 kW (29.5/34.9 hp), cont/30min. That ratio says what the machine is: a heavy vertical lathe first, with milling as the finishing capability that saves a second setup.
It turns up to 5,000 mm (196.9 in) in diameter on a 4,000 mm (157.5 in) table, to a height of 2,500 mm (98.4 in), with 50,000 kg (110,229 lb) on the table. Table speed is about 50 rpm in two steps. When the turning is done, the table becomes a C-axis at 0 to 0.3 rpm with 0.001 degree indexing, and the ISO 50 spindle works at up to about 2,000 rpm.
Consider what a second setup costs at this size. A 50,000 kg part has to be unclamped, lifted, carried to a boring mill and indicated in again, which is a shift of crane and setter time and a fresh chance of error between the turned and the milled features. Doing the drilling and milling on the lathe removes that step.
The cross rail moves 250 mm (9.8 in) x 7 steps and X covers -200 to +2,750 mm (-7.9 to +108.3 in). Ram and Z travel are chosen from the same lists as on the VTC-30/40, and the control from Fanuc 31i-B or 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) |
| C Axis Table Speed | 0 ~ 0.3 rpm |
| C Axis Indexing | 0.001˚ |
| 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) |
| Milling Spindle Speed | Max.~2,000 rpm |
| Milling Spindle Motor | A.C 22/26 kW (29.5/34.9 hp) (cont/30min) |
| Milling Spindle Taper | ISO 50 |
| 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 with 50,000 kg (110,229 lb) of table load
- 5,000 mm (196.9 in) swing and 2,500 mm (98.4 in) turning height
- ISO 50 milling spindle and 0.001 degree C-axis for single-setup finishing
- Cross rail moves 250 mm (9.8 in) x 7 steps
Limitations
- Milling motor is A.C 22/26 kW (29.5/34.9 hp), small beside the table drive
- C-axis speed of 0 to 0.3 rpm
- About 50 rpm table speed and about 2,000 rpm milling speed
Best For
Frequently Asked Questions
01
Its milling motor is A.C 22/26 kW (29.5/34.9 hp) at up to about 2,000 rpm with an ISO 50 taper. That handles drilling, tapping and moderate face milling. HNK publishes no torque figure, and the machine's main power, A.C 100 kW (134.1 hp), is in the table drive for turning.
02
The NT-40/50 is a turning lathe only. The VTC-40/50 has the same 4,000 mm (157.5 in) table, 5,000 mm (196.9 in) swing and 50,000 kg (110,229 lb) load and adds a milling spindle and a C-axis table.
03
Z travel is listed as 1,300/1,500/2,000/2,200/2,500 mm (51.2/59.1/78.7/86.6/98.4 in) and the ram as 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). The combination is agreed with HNK at order.
04
0 to 0.3 rpm, the figure HNK lists for this and every larger VTC. Indexing resolution is 0.001 degree, the same as on the smallest machine in the series.
