HNK HFB-250
Key Specifications
Spindle Taper
Table Size
x axis travel
y axis travel
z axis travel
w axis travel
How much does the HNK HFB-250 cost?
Price estimate
We do not have a price for the HNK HFB-250 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 HFB-250 carries the largest boring spindle HNK lists: Ø250 mm (9.8 in), on a floor-type machine whose rotary table measures 5,000 x 9,000 mm (196.9 x 354.3 in). It tops the HFB series.
Reach is the headline. Ram travel is 1,800 mm (70.9 in), with 2,000 mm (78.7 in) in braces, and the spindle travels a further 1,600 mm (63.0 in) in W. The Z and W total is 3,400 mm (133.9 in). Unlike the smaller models, the W and total rows carry no braced alternative here; the figures stand alone. With that stroke the spindle can bore through the full depth of a large engine frame or reach the far wall of a deep casing from one side.
Vertical travel is 4,000 ~ 8,000 mm (157.5 ~ 315.0 in) and column travel 4,000 ~ 30,000 mm (157.5 ~ 1,181.1 in), both matched by the HFB-200. The table load is also the same at 100,000 kg (220,459 lb), with 150,000 kg (330,688 lb) in braces, but the table is half as long again, so it suits long parts more than heavier ones.
Spindle speed is 5 to 1,500 rpm and the taper ISO 60 [50 Adaptor]. As for the whole HFB series, HNK cites a stabilized ram extension design against thermal elongation and ram bending, and publishes no spindle power. Fanuc 31i-B and Siemens 840D are listed.
Full Specifications
| Parameter | Value |
|---|---|
| X Axis Travel | 4,000 ~ 30,000 mm (157.5 ~ 1,181.1 in) |
| Y Axis Travel | 4,000 ~ 8,000 mm (157.5 ~ 315.0 in) |
| Z Axis Travel | 1,800 mm (70.9 in) {2,000 mm (78.7 in)} |
| W Axis Travel | 1,600 mm (63.0 in) |
| Z W Total Travel | 3,400 mm (133.9 in) |
| Table Size | 5,000 x 9,000 mm (196.9 x 354.3 in) |
| Table Indexing | 0.001° (Every 90˚ indexing by locate pin) |
| Table Type | Rotary |
| Max Rotary Table Load | 100,000 kg (220,459 lb) {150,000 kg (330,688 lb)} |
| Spindle Diameter | Ø250 mm (9.8 in) |
| Spindle Speed Range | 5 ~ 1,500 rpm |
| Spindle Taper | ISO 60 [50 Adaptor] |
| CNC Control | Fanuc 31i-B, Siemens 840D |
Specifications sourced from en.hnkkorea.com — verified 2026-10-04
Strengths & Limitations
Strengths
- Ø250 mm (9.8 in) spindle, the largest in the HFB series
- Z and W total of 3,400 mm (133.9 in)
- 5,000 x 9,000 mm (196.9 x 354.3 in) rotary table
- ISO 60 taper with a 50 adaptor
Limitations
- Table load is the same 100,000 kg (220,459 lb) as on the HFB-200
- Y travel range is no greater than the HFB-200
- No motor rating published; 5 to 1,500 rpm
Best For
Frequently Asked Questions
01
HNK lists 1,800 mm (70.9 in) of ram travel, 1,600 mm (63.0 in) of spindle travel and a Z and W total of 3,400 mm (133.9 in). A ram travel of 2,000 mm (78.7 in) appears in braces.
02
Not in load: both list 100,000 kg (220,459 lb), with 150,000 kg (330,688 lb) in braces. The HFB-250 table is larger, 5,000 x 9,000 mm (196.9 x 354.3 in) against the 5,000 x 6,000 mm (196.9 x 236.2 in) of the HFB-200.
03
Column travel (X) is 4,000 ~ 30,000 mm (157.5 ~ 1,181.1 in) and spindle head vertical travel (Y) 4,000 ~ 8,000 mm (157.5 ~ 315.0 in). Both are ranges, fixed when the bed length and column height are ordered.
04
The taper row reads ISO 60 [50 Adaptor], which indicates a 50-taper adaptor for the ISO 60 spindle. Check with HNK which adaptor is supplied and what it does to tool overhang.
More from HNK
Other CNC Boring Machines
DN Solutions DBD 130
DN Solutions DBD 1270
Juaristi TX1-MG8
Toshiba BTD-130.R17
PAMA Speedram
