HNK GPM-20F
Key Specifications
Max Spindle
max workpiece size
max workpiece weight
ram size
x axis travel
y axis travel
How much does the HNK GPM-20F cost?
Price estimate
We do not have a price for the HNK GPM-20F 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 GPM-20F machines complete crankshafts for medium-speed marine engines. It accepts a workpiece of Ø1,300 x 12,000 mm (51.2 x 472.4 in) weighing up to 30,000 kg (66,138 lb), and HNK states that all cutting, meaning milling, boring, drilling and tapping, is finished in one set-up.
To reach every part of a twelve-metre shaft, the X axis runs 15,000 mm (590.6 in). Y is 4,200 mm (165.4 in), far more than the shaft diameter, which leaves the head room to come down beside the work. The ram is 380 x 380 mm (15.0 x 15.0 in) with 1,000 mm (39.4 in) of Z.
Spindle speed is at most 2,000 rpm, a figure for large drills, taps and face mills in forged steel. HNK lists Fanuc 31i-B as the control. The feed-rate cell is not printed cleanly and no spindle power is given.
Full Specifications
| Parameter | Value |
|---|---|
| Max Workpiece Size | Ø1,300 x 12,000 mm (51.2 x 472.4 in) |
| Max Workpiece Weight | 30,000 kg (66,138 lb) |
| Max Spindle Speed | Max. 2,000 rpm |
| Ram Size | 380 x 380 mm (15.0 x 15.0 in) |
| X Axis Travel | 15,000 mm (590.6 in) |
| Y Axis Travel | 4,200 mm (165.4 in) |
| Z Axis Travel | 1,000 mm (39.4 in) |
| CNC Control | Fanuc31i-B |
Specifications sourced from en.hnkkorea.com — verified 2026-10-04
Strengths & Limitations
Strengths
- Holds a crankshaft up to Ø1,300 x 12,000 mm (51.2 x 472.4 in)
- Workpiece weight up to 30,000 kg (66,138 lb)
- 15,000 mm (590.6 in) of X travel and 4,200 mm (165.4 in) of Y
- Milling, boring, drilling and tapping in one set-up, per HNK
Limitations
- Spindle speed limited to 2,000 rpm
- Z travel of 1,000 mm (39.4 in) on a 380 x 380 mm ram
- No spindle power, taper or usable feed figure published
Best For
Frequently Asked Questions
01
The maximum workpiece is Ø1,300 x 12,000 mm (51.2 x 472.4 in) and the maximum workpiece weight 30,000 kg (66,138 lb). Axis travels are 15,000 mm (590.6 in) in X, 4,200 mm (165.4 in) in Y and 1,000 mm (39.4 in) in Z.
02
According to HNK, all cutting processes such as milling, boring, drilling and tapping for crankshafts of medium-speed vessels are completed at one set-up on this model. The spindle runs up to 2,000 rpm.
03
Both are listed for medium-speed crankshaft shops. The HPF-15 prepares the forging on a 1,500 x 8,000 mm (59.1 x 315.0 in) table at 3,000 rpm: measuring, marking, facing and flange drilling. The GPM-20F does the cutting on the finished shaft.
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