Johnford ST-240CX
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-240CX cost?
Price estimate
We do not have a price for the Johnford ST-240CX 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-240CX is the six-metre C-spindle lathe on the large frame, with 6,050 mm (238.2 in) of Z travel and 1,200 mm (47.2 in) of swing over the bed.
It is the widest of the three ST-240C variants and the only one whose floor plan changes noticeably. The table gives 11,667 x 2,950 x 3,258 mm (459.3 x 116.1 x 128.3 in). The ST-240C and ST-240CH are both 2,504 mm (98.6 in) wide. Anyone moving up to this frame for clearance should check aisle width and crane hook height at the same time.
In return the carriage clears 1,000 mm (39.4 in) and travels 520 mm (20.5 in) on X.
The spindle is the A2-15 unit with a 200 mm (7.9 in) bearing, a 152 mm (6 in) bore and 139 mm (5.5 in) of bar capacity. Standard power is 30 / 37 kW (40.2 / 49.6 hp) and standard speed 1,500 rpm; the 37 / 45 kW (49.6 / 60.3 hp) motor and the 1,200 rpm geared headstock are alternatives. The tailstock travels 5,400 mm (212.6 in) on a Ø200 mm (7.9 in) MT#7 quill. Machine weight is 32,500 kg (71,500 lb), and the X and Z axes have 7 kW servo motors.
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 | 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 | 520 mm (20.5 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 | 32,500 kg (71,500 lb) |
| Machine Dimensions | 11,667 x 2,950 x 3,258 mm (459.3 x 116.1 x 128.3 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 6,050 mm (238.2 in) of Z travel with 1,000 mm (39.4 in) swing over the cross slide
- 520 mm (20.5 in) of X travel
- Tailstock travel of 5,400 mm (212.6 in)
- 200 mm (7.9 in) spindle bearing diameter
- Up to 37 / 45 kW (49.6 / 60.3 hp)
Limitations
- 2,950 mm (116.1 in) wide, against 2,504 mm (98.6 in) for the ST-240CH
- Machine weight of 32,500 kg (71,500 lb)
- Spindle speed of 1,500 rpm at most
- Rapid traverse of 12 m/min on Z
Best For
Frequently Asked Questions
01
2,950 mm (116.1 in), on a length of 11,667 mm (459.3 in) and a height of 3,258 mm (128.3 in). The ST-240CH with the same bed is 2,504 mm (98.6 in) wide.
02
Swing over the bed 1,200 mm (47.2 in), over the cross slide 1,000 mm (39.4 in), Z travel 6,050 mm (238.2 in), X travel 520 mm (20.5 in) and tailstock travel 5,400 mm (212.6 in).
03
04
A 510 mm (20.1 in) chuck as standard, 610 mm (24 in) as an option, on an A2-15 nose with a 152 mm (6 in) bore and 139 mm (5.5 in) of bar capacity.
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