Johnford ST-80D
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-80D cost?
Price estimate
We do not have a price for the Johnford ST-80D 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-80D introduces the largest spindle of the standard ST table: a 185 mm (7.3 in) bore with 165 mm (6.5 in) of bar capacity on a 240 mm (9.4 in) bearing, over 2,000 mm (78.7 in) of Z travel.
The D spindle keeps the A2-15 nose and the 510 mm (20.1 in) chuck of the C version, so chucks and jaws interchange. What changes is everything behind the nose. The bore grows from 152 mm (6 in) on the ST-80C, the bearing from 200 mm (7.9 in), and the speed drops to 1,000 rpm.
The bore row has a second figure: with the geared headstock the bore is 176 mm (6.9 in). So the gear-driven option costs some through-hole. Both headstock types are listed at the same 1,000 rpm, which is not the case for the C spindle.
Power is 30 / 37 kW (40.2 / 49.6 hp) with 37 / 45 kW (49.6 / 60.3 hp) optional. The frame is the 920 mm (36.2 in) swing long bed with 7 kW axis motors and a Ø200 mm (7.9 in) MT#7 tailstock quill. Machine weight is 15,500 kg (34,100 lb), and the tailstock travels 1,700 mm (66.9 in).
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | 920 mm (36.2 in) |
| Swing Over Cross Slide | 700 mm (27.6 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 | 370 mm (14.6 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 | 15,500 kg (34,100 lb) |
| Machine Dimensions | 7,412 x 2,504 x 2,895 mm (291.8 x 98.6 x 114 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 185 mm (7.3 in) spindle bore with 165 mm (6.5 in) bar capacity
- 240 mm (9.4 in) spindle bearing diameter
- Same A2-15 nose and 510 mm (20.1 in) chuck as the C spindle
- 30 / 37 kW (40.2 / 49.6 hp) or 37 / 45 kW (49.6 / 60.3 hp)
- 2,000 mm (78.7 in) of Z travel with 7 kW axis motors
Limitations
- Spindle speed is limited to 1,000 rpm
- The geared headstock reduces the bore to 176 mm (6.9 in)
- Swing over the cross slide of 700 mm (27.6 in)
- 15,500 kg (34,100 lb) for a two-metre lathe
Best For
Frequently Asked Questions
01
Its bore: 185 mm (7.3 in), or 176 mm (6.9 in) with the geared headstock, with 165 mm (6.5 in) of bar capacity and a 240 mm (9.4 in) bearing diameter. Speed is 1,000 rpm with either headstock.
02
The ST-80C has a 152 mm (6 in) bore, 139 mm (5.5 in) of bar capacity and 1,500 rpm. The ST-80D has the 185 mm (7.3 in) bore, 165 mm (6.5 in) of bar capacity and 1,000 rpm. Nose, chuck and motor are the same.
03
The optional accessory list names bigger spindle bores like Ø234, Ø318, Ø410, Ø510 mm or even greater. Those go beyond the A to D spindles of the standard table.
04
15,500 kg (34,100 lb), on outside dimensions of 7,412 x 2,504 x 2,895 mm (291.8 x 98.6 x 114 in). The tailstock travels 1,700 mm (66.9 in).
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