Johnford ST-400BX+B+C+Y
Key Specifications
Max Spindle
Tool Capacity
Spindle Power
swing over bed
max turning diameter
distance between centers
How much does the Johnford ST-400BX+B+C+Y cost?
Price estimate
We do not have a price for the Johnford ST-400BX+B+C+Y 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
Ten metres between centers: the Johnford ST-400BX+B+C+Y has 10,000 mm (393.7 in) of Z travel, by far the longest bed of the ST Turn-Mill columns, and a machine length of 16,275 mm (640.7 in).
The part it is built around is long and thin. Maximum turning diameter is Ø350 mm (13.8 in) under a Ø1,200 mm (47.2 in) swing over the bed, the chuck is Ø381 mm (15 in), and the bar capacity through the A2-11 spindle is Ø116 mm (4.6 in). A rear manual 4-jaw chuck of Ø600 mm is listed as well. The tailstock travels 9,700 mm (381.9 in) and, unlike the other five columns, has an MT#6 quill taper.
Spindle speed is 2,000 rpm, and the main motor is the largest of the group at 37 / 45 kW (49.6 / 60.3 hp). The B-axis spindle is the same HSK-A100 unit as elsewhere, 38 / 62 kW (51.0 / 83.1 hp) at up to 6,000 rpm, with 60 tools behind it.
A shaft of this length cannot be machined on centers alone. Manual or hydraulic self-centering steady rests, with manual or automatic travelling, are on the optional list and belong in any realistic configuration. Rapid traverse on Z is 10 m/min. Weight is 63,000 kg (138,889 lb).
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | Ø1,200 mm (Ø47.2 in) |
| Max Turning Diameter | Ø350 mm (Ø13.8 in) |
| Distance Between Centers | 10,000 mm (393.7 in) |
| Chuck Size | Ø381 mm (Ø15 in) |
| Chuck Rear | Manual 4-jaw Ø600 mm |
| Bar Capacity | Ø116 mm (Ø4.6 in) |
| Spindle Nose | A2-11 |
| Spindle Bore | Ø132.5 mm (Ø5.2 in) |
| Spindle Transmission | Auto 4-speed gearbox |
| Max Spindle Speed | 2,000 rpm |
| Spindle Motor Power | 37 / 45 kW (49.6 / 60.3 hp) |
| Milling Spindle Taper | HSK-A100 |
| Milling Spindle Power | 38 / 62 kW (51.0 / 83.1 hp) |
| Milling Spindle Torque | 252 / 411 Nm (186 / 303 lb-ft) |
| Milling Spindle Speed | 6,000 rpm |
| B Axis Range | -110°~+90° |
| B Axis Indexing | Every 5° (std.) 2.5° (opt.) |
| B Axis Positioning Hydraulic Brake | Free Angle 0.001° |
| C Axis Resolution | 0.001° |
| Tool Capacity | 60 |
| Max Tool Diameter (full magazine) | Ø125 mm (Ø4.9 in) |
| Max Tool Diameter Without Adjacent Tools | Ø200 mm (Ø7.9 in) |
| Max Tool Weight | 15 kg (33 lb) |
| Max Tool Length | 400 mm (15.7 in) |
| X Axis Travel | +761 / -10 mm (+30 / -0.4 in) |
| Y Axis Travel | ±100 mm (±3.9 in) |
| Z Axis Travel | 10,000 mm (393.7 in) |
| Rapid Traverse Xyz | 10 / 10 / 10 m/min (394 / 394 / 394 ipm) |
| Tailstock Travel | 9,700 mm (381.9 in) |
| Tailstock Quill Travel | 150 mm (5.9 in) |
| Tailstock Quill Diameter | Ø200 mm (Ø7.9 in) |
| Tailstock Taper | MT#6 |
| Servo Motor X | 7 kW |
| Servo Motor Y | 4 kW |
| Servo Motor Z | 9 kW |
| Servo Motor B | 3 kW |
| Machine Weight | 63,000 kg (138,889 lb) |
| Bed Inclination | 60° |
| Machine Dimensions | 16,275 x 4,710 x 3,600 mm (640.7 x 185.4 x 141.7 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 10,000 mm (393.7 in) of Z travel and 9,700 mm (381.9 in) of tailstock travel
- 37 / 45 kW (49.6 / 60.3 hp) main spindle at up to 2,000 rpm
- 60-tool magazine for the HSK-A100 milling spindle
- B, C and Y axes for milling along the whole shaft
- Rear manual 4-jaw chuck of Ø600 mm in addition to the Ø381 mm (15 in) front chuck
Limitations
- Maximum turning diameter is Ø350 mm (13.8 in)
- 16,275 mm (640.7 in) long and 63,000 kg (138,889 lb)
- Rapid traverse is 10 m/min on a 10,000 mm (393.7 in) axis
- Steady rests are optional accessories
Best For
Frequently Asked Questions
01
Distance between centers and Z travel are both 10,000 mm (393.7 in). The tailstock travels 9,700 mm (381.9 in). The page also states that Z-axis travels of 1500, 2000, 2500, 3000 mm or up to 10000 mm are available on the ST Turn-Mill.
02
Ø350 mm (13.8 in) is the maximum turning diameter in this column, with Ø1,200 mm (47.2 in) of swing over the bed. X travel is +761 / -10 mm.
03
MT#6. The quill is Ø200 mm (7.9 in) with 150 mm (5.9 in) of travel. The other ST Turn-Mill columns, such as the ST-160BX+B+C+Y, list MT#7.
04
63,000 kg (138,889 lb). The outside dimensions are 16,275 x 4,710 x 3,600 mm (640.7 x 185.4 x 141.7 in), so the foundation and the route into the building need planning before anything else.
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