Johnford ST-80DX
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-80DX cost?
Price estimate
We do not have a price for the Johnford ST-80DX 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 Johnford ST-80DX pairs the largest standard ST spindle with the largest ST frame on the shortest long bed: a 185 mm (7.3 in) bore, 1,200 mm (47.2 in) of swing over the bed and 2,000 mm (78.7 in) of Z travel.
Both the spindle and the frame are at their catalogue limit, and the options list extends each. Bigger spindle bores, with Ø234, Ø318, Ø410 and Ø510 mm named, go beyond the D spindle. A 4-jaw or special chuck is not on the ST list, which names only the 510 mm (20.1 in) and 610 mm (24 in) hydraulic chucks, so workholding for parts near the 1,000 mm (39.4 in) swing over the cross slide is a point to settle with Johnford.
In standard form the D spindle has 165 mm (6.5 in) of bar capacity, a 240 mm (9.4 in) bearing and four automatic speeds to 1,000 rpm, with 30 / 37 kW (40.2 / 49.6 hp) or 37 / 45 kW (49.6 / 60.3 hp). The geared headstock has a 176 mm (6.9 in) bore.
X travel is 520 mm (20.5 in). The tailstock travels 1,700 mm (66.9 in) on a Ø200 mm (7.9 in) MT#7 quill. The machine weighs 15,700 kg (34,540 lb) and measures 7,412 x 2,715 x 3,200 mm (291.8 x 106.9 x 126 in).
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | 1,200 mm (47.2 in) |
| Swing Over Cross Slide | 1,000 mm (39.4 in) |
| Chuck Size | 510 mm (20.1 in) |
| Chuck Size Optional | 610 mm (24 in) |
| Bar Capacity | 165 mm (6.5 in) |
| Spindle Nose | A2-15 |
| Spindle Bore | 185 mm (7.3 in) / Geared headstock 176 mm (6.9 in) |
| Spindle Transmission | Auto 4 speeds |
| Max Spindle Speed | 1,000 rpm |
| Spindle Speed Geared Headstock | 1,000 rpm |
| Spindle Motor Power | 30 / 37 kW (40.2 / 49.6 hp) (Std.); 37 / 45 kW (49.6 / 60.3 hp) (Opt.) |
| Spindle Bearing Diameter | 240 mm (9.4 in) |
| Turret Stations | 12 |
| X Axis Travel | 520 mm (20.5 in) |
| Y Axis Travel Optional | ±75 mm (±3 in) |
| Z Axis Travel | 2,000 mm (78.7 in) |
| Rapid Traverse Rate | X: 10 m/min (394 ipm); Y: 10 m/min (394 ipm); Z: 12 m/min (472 ipm) |
| Tailstock Travel | 1,700 mm (66.9 in) |
| Tailstock Quill Travel | 150 mm (5.9 in) |
| Tailstock Quill Diameter | Ø200 mm (Ø7.9 in) |
| Tailstock Taper | MT#7 |
| Servo Motor X | 7 kW |
| Servo Motor Y Optional | 3 kW |
| Servo Motor Z | 7 kW |
| Bed Inclination | 60° |
| Machine Weight | 15,700 kg (34,540 lb) |
| Machine Dimensions | 7,412 x 2,715 x 3,200 mm (291.8 x 106.9 x 126 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 185 mm (7.3 in) bore on the 1,200 mm (47.2 in) swing frame
- 1,000 mm (39.4 in) swing over the cross slide, 520 mm (20.5 in) of X travel
- 240 mm (9.4 in) spindle bearing diameter
- Bigger spindle bores are a listed option
- 30 / 37 kW (40.2 / 49.6 hp) or 37 / 45 kW (49.6 / 60.3 hp)
Limitations
- Spindle speed of 1,000 rpm
- Listed chucks stop at 610 mm (24 in)
- 15,700 kg (34,540 lb) on a 2,000 mm (78.7 in) bed
- Machine height of 3,200 mm (126 in)
Best For
Frequently Asked Questions
01
The spindle. The ST-80CX has a 152 mm (6 in) bore, 139 mm (5.5 in) of bar capacity and 1,500 rpm. The ST-80DX has a 185 mm (7.3 in) bore, 165 mm (6.5 in) of bar capacity and 1,000 rpm, and weighs 15,700 kg (34,540 lb) against 15,500 kg (34,100 lb).
02
A 510 mm (20.1 in) 3-jaw hydraulic through-hole chuck as standard and a 610 mm (24 in) chuck as the option. Swing over the cross slide is 1,000 mm (39.4 in).
03
The optional accessory list offers bigger spindle bores like Ø234, Ø318, Ø410, Ø510 mm or even greater. The standard bore is 185 mm (7.3 in), or 176 mm (6.9 in) with the geared headstock.
04
7,412 x 2,715 x 3,200 mm (291.8 x 106.9 x 126 in). Machine weight is 15,700 kg (34,540 lb) and the bed is inclined at 60°.
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