Johnford ST-240CH
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-240CH cost?
Price estimate
We do not have a price for the Johnford ST-240CH 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-240CH covers the largest envelope on Johnford's medium-sized ST page with the C spindle: 6,050 mm (238.2 in) of Z travel, 1,000 mm (39.4 in) of swing over the bed and 800 mm (31.5 in) over the cross slide.
A carriage that has to cross six metres at 12 m/min on Z, and 420 mm (16.5 in) at 10 m/min on X, spends real time in rapid moves. On a long part with features at both ends this shows in the cycle, so programs are best grouped by position along the bed. The axes themselves are driven by 7 kW servo motors.
The tailstock travels 5,400 mm (212.6 in). Its quill is Ø200 mm (7.9 in) with an MT#7 taper and 150 mm (5.9 in) of travel, and it is programmable.
At the headstock the figures are those of the A2-15 spindle. Chuck 510 mm (20.1 in), bore 152 mm (6 in), bar capacity 139 mm (5.5 in), bearing 200 mm (7.9 in), 30 / 37 kW (40.2 / 49.6 hp) and 1,500 rpm, with the larger motor and the geared headstock as alternatives. The machine weighs 32,400 kg (71,280 lb) and is 11,667 mm (459.3 in) long.
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | 1,000 mm (39.4 in) |
| Swing Over Cross Slide | 800 mm (31.5 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 | 420 mm (16.5 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 | 32,400 kg (71,280 lb) |
| Machine Dimensions | 11,667 x 2,504 x 2,955 mm (459.3 x 98.6 x 116.3 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 6,050 mm (238.2 in) of Z travel with 800 mm (31.5 in) swing over the cross slide
- Tailstock travel of 5,400 mm (212.6 in)
- 7 kW servo motors on X and Z
- 30 / 37 kW (40.2 / 49.6 hp), optionally 37 / 45 kW (49.6 / 60.3 hp)
- 152 mm (6 in) bore with 139 mm (5.5 in) bar capacity
Limitations
- Rapid traverse of 12 m/min over a 6,050 mm (238.2 in) Z axis
- Machine weight of 32,400 kg (71,280 lb)
- 1,500 rpm at most with the belt-type gearbox
- 11,667 mm (459.3 in) long
Best For
Frequently Asked Questions
01
The machine is 11,667 mm (459.3 in) long. Z travel is 6,050 mm (238.2 in), tailstock travel 5,400 mm (212.6 in) and X travel 420 mm (16.5 in).
02
10 m/min on X and 12 m/min on Z, with 10 m/min on the optional Y axis. The X and Z servo motors are 7 kW each.
03
The ST-240CX has 1,200 mm (47.2 in) of swing over the bed, 1,000 mm (39.4 in) over the cross slide and 520 mm (20.5 in) of X travel, and weighs 32,500 kg (71,500 lb). The ST-240CH has 1,000 mm (39.4 in), 800 mm (31.5 in) and 420 mm (16.5 in), at 32,400 kg (71,280 lb).
04
The A2-15 C spindle with a 152 mm (6 in) bore, a 200 mm (7.9 in) bearing diameter and four automatic speeds. The standard motor is 30 / 37 kW (40.2 / 49.6 hp).
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