Johnford ST-240C
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-240C cost?
Price estimate
We do not have a price for the Johnford ST-240C 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-240C is the six-metre C-spindle lathe on the 920 mm (36.2 in) swing frame, with 6,050 mm (238.2 in) of Z travel.
Johnford offers this length and spindle on three frames, and at six metres the choice between them is mostly about clearance. This one swings 700 mm (27.6 in) over the cross slide with 370 mm (14.6 in) of X travel. The ST-240CH swings 800 mm (31.5 in) with 420 mm (16.5 in) of X, and the ST-240CX swings 1,000 mm (39.4 in) with 520 mm (20.5 in). Weight barely separates them: 32,200 kg (70,840 lb) here, 32,400 kg (71,280 lb) and 32,500 kg (71,500 lb) for the other two.
Floor space is where this frame saves. It is 2,504 mm (98.6 in) wide and 2,895 mm (114 in) high on a length of 11,667 mm (459.3 in).
The spindle has an A2-15 nose, a 152 mm (6 in) bore and 139 mm (5.5 in) of bar capacity, with 30 / 37 kW (40.2 / 49.6 hp) as standard. Maximum speed is 1,500 rpm with the belt-type gearbox. The tailstock travels 5,400 mm (212.6 in) and carries a Ø200 mm (7.9 in) MT#7 quill with 150 mm (5.9 in) of travel.
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 | 6,050 mm (238.2 in) |
| Rapid Traverse Rate | X: 10 m/min (394 ipm); Y: 10 m/min (394 ipm); Z: 12 m/min (472 ipm) |
| Tailstock Travel | 5,400 mm (212.6 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 | 32,200 kg (70,840 lb) |
| Machine Dimensions | 11,667 x 2,504 x 2,895 mm (459.3 x 98.6 x 114 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 6,050 mm (238.2 in) of Z travel with the A2-15 spindle
- Narrowest of the three six-metre C frames at 2,504 mm (98.6 in) wide
- Tailstock travel of 5,400 mm (212.6 in)
- Optional 37 / 45 kW (49.6 / 60.3 hp) motor
- 152 mm (6 in) bore, 139 mm (5.5 in) bar capacity
Limitations
- 700 mm (27.6 in) swing over the cross slide
- 370 mm (14.6 in) of X travel
- Machine weight of 32,200 kg (70,840 lb)
- Rapid traverse of 12 m/min on Z over 6,050 mm (238.2 in)
Best For
Frequently Asked Questions
01
In swing and X travel. Swing over the cross slide is 700 mm (27.6 in) on the ST-240C, 800 mm (31.5 in) on the ST-240CH and 1,000 mm (39.4 in) on the ST-240CX. X travel is 370 mm (14.6 in) on the ST-240C, 420 mm (16.5 in) on the ST-240CH and 520 mm (20.5 in) on the ST-240CX.
02
03
A2-15 nose, 152 mm (6 in) bore, 200 mm (7.9 in) bearing diameter, four automatic speeds and 1,500 rpm with the standard belt-type gearbox. The motor is 30 / 37 kW (40.2 / 49.6 hp).
04
11,667 x 2,504 mm (459.3 x 98.6 in), with a height of 2,895 mm (114 in). A chain type chip conveyor with trolley is standard.
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