Johnford ST-80C
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-80C cost?
Price estimate
We do not have a price for the Johnford ST-80C 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-80C is the first ST lathe on which the optional 610 mm (24 in) chuck fits under the carriage: swing over the cross slide is 700 mm (27.6 in), against 600 mm (23.6 in) on the short ST-70C.
That makes this frame the natural home of the A2-15 spindle. The standard chuck is 510 mm (20.1 in), the bore 152 mm (6 in), bar capacity 139 mm (5.5 in) and the bearing diameter 200 mm (7.9 in). Z travel is 2,000 mm (78.7 in).
Two headstock types are listed. The belt-type gearbox, which the accessory list calls standard, runs to 1,500 rpm, or 1,400 rpm in the optional version. The geared headstock runs to 1,200 rpm. Either has four automatic speeds. The motor is 30 / 37 kW (40.2 / 49.6 hp), with 37 / 45 kW (49.6 / 60.3 hp) as the option, so the choice is between a little more speed and a gear-driven spindle for sustained heavy cuts.
A Ø200 mm (7.9 in) MT#7 tailstock quill and 7 kW axis motors match the spindle. Rapid traverse is 10 m/min on X and 12 m/min on Z. The machine weighs 15,300 kg (33,660 lb); the B-spindle version, the ST-80B, weighs 15,000 kg (33,000 lb).
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 | 139 mm (5.5 in) |
| Spindle Nose | A2-15 |
| Spindle Bore | 152 mm (6 in) |
| Spindle Transmission | Auto 4 speeds |
| Max Spindle Speed | 1,500 rpm (Std.); 1,400 rpm (Opt.) |
| Spindle Speed Geared Headstock | 1,200 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 | 200 mm (7.9 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 | 15,300 kg (33,660 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
- 700 mm (27.6 in) swing over the cross slide clears a 610 mm (24 in) chuck
- 30 / 37 kW (40.2 / 49.6 hp) standard, 37 / 45 kW (49.6 / 60.3 hp) optional
- Belt-type gearbox or geared headstock
- 152 mm (6 in) bore with 139 mm (5.5 in) bar capacity
- Ø200 mm (7.9 in) MT#7 tailstock quill
Limitations
- 1,500 rpm at most; 1,200 rpm with the geared headstock
- Rapid traverse of 10 m/min on X and 12 m/min on Z
- 15,300 kg (33,660 lb) and 7,412 mm (291.8 in) long
- Live tooling, C axis and Y axis are options
Best For
Frequently Asked Questions
01
Speed, as far as the table goes. The belt type gear box is listed at 1,500 rpm as standard and 1,400 rpm as an option; the geared headstock at 1,200 rpm. The accessory list names the belt-type gearbox for heavy-duty cutting as standard equipment.
02
Yes. The optional chuck is 610 mm (24 in) and the swing over the cross slide is 700 mm (27.6 in), with 920 mm (36.2 in) over the bed. The standard chuck is 510 mm (20.1 in).
03
The ST-80D has a larger bore, 185 mm (7.3 in), with 165 mm (6.5 in) of bar capacity and a 240 mm (9.4 in) bearing diameter, and runs at 1,000 rpm. The ST-80C has a 152 mm (6 in) bore and reaches 1,500 rpm.
04
30 / 37 kW (40.2 / 49.6 hp) as standard. A 37 / 45 kW (49.6 / 60.3 hp) motor is the listed option. The transmission has four automatic speeds.
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