HNK HCT-45T
Key Specifications
table diameter
max swing
table speed range
max table load
table drive motor
x axis travel
How much does the HNK HCT-45T cost?
Price estimate
We do not have a price for the HNK HCT-45T 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 HCT-45T is a CNC vertical lathe for crankthrows, the forged webs of built-up crankshafts for large ship engines. Its table is 4,500 mm (177.2 in) in diameter with a maximum swing of 5,000 mm (196.9 in), and it carries 60,000 kg (132,275 lb).
A crankthrow is turned off-centre. The pin sits far from the journal axis, so the forging is clamped eccentrically and the table must drive an unbalanced mass. That explains the 121 kW (162.3 hp) table motor and the low speed range of 1 ~ 35 rpm.
The tool arm travels 2,350 mm (92.5 in) horizontally in X and 1,300 mm (51.2 in) vertically in Z. HNK also mentions HCT-TD models with double tool arms. The control is Fanuc 31i-B, with Siemens 840D in braces.
Full Specifications
| Parameter | Value |
|---|---|
| Table Diameter | 4,500 mm (177.2 in) |
| Max Swing | 5,000 mm (196.9 in) |
| Table Speed Range | 1 ~ 35 rpm |
| Max Table Load | 60,000 kg (132,275 lb) |
| Table Drive Motor | 121 kW (162.3 hp) |
| X Axis Travel | 2,350 mm (92.5 in) |
| Z Axis Travel | 1,300 mm (51.2 in) |
| CNC Control | Fanuc 31i-B {Siemens 840D} |
Specifications sourced from en.hnkkorea.com — verified 2026-10-04
Strengths & Limitations
Strengths
- Table load of 60,000 kg (132,275 lb) on a 4,500 mm (177.2 in) table
- 121 kW (162.3 hp) table drive for eccentric loads
- Tool arm X travel of 2,350 mm (92.5 in)
Limitations
- Table speed stops at 35 rpm
- A single-purpose design for crankthrows
- Lowest table load of the HCT sizes with a published figure
Best For
Frequently Asked Questions
01
HNK designs the HCT series for efficient machining of crankthrows for large ship engines. The HCT-45T has a 4,500 mm (177.2 in) table, a 5,000 mm (196.9 in) maximum swing and a table load of 60,000 kg (132,275 lb).
02
From 1 to 35 rpm, driven by a 121 kW (162.3 hp) motor. Low speed is normal here because a crankthrow is turned at a large radius and clamped off-centre, so cutting speed is reached at few revolutions.
03
The HCT-50T has a 5,000 mm (196.9 in) table, 5,400 mm (212.6 in) swing, 70,000 kg (154,321 lb) of load, 2,550 mm (100.4 in) of X and 1,400 mm (55.1 in) of Z. Motor power and the 1 ~ 35 rpm range are the same as on the HCT-45T.
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