Johnford ST-240DX
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-240DX cost?
Price estimate
We do not have a price for the Johnford ST-240DX 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-240DX is the largest lathe of the ST series in every respect: 6,050 mm (238.2 in) of Z travel, 1,200 mm (47.2 in) of swing over the bed, the D spindle, and 32,700 kg (71,940 lb) of machine weight, the highest figure in the three ST tables.
Beyond this model the series does not get bigger; it changes type. Larger swings and longer beds are the territory of the LC flat-bed lathes, where the LC-40 starts at 1,010 mm (39.8 in) of swing over the bed and offers distances between centers up to 20,000 mm. More functions, on the other hand, come through the ST options: a C axis, a live tool turret, a Y axis, a sub-spindle, or a B-axis milling/turning spindle.
As listed, the ST-240DX is a two-axis slant-bed lathe with a 12-position turret. Swing over the cross slide is 1,000 mm (39.4 in) and X travel 520 mm (20.5 in). The spindle has a 185 mm (7.3 in) bore, 165 mm (6.5 in) of bar capacity and a 240 mm (9.4 in) bearing, with 30 / 37 kW (40.2 / 49.6 hp) and 1,000 rpm.
The tailstock travels 5,400 mm (212.6 in). Outside dimensions are 11,667 x 2,950 x 3,258 mm (459.3 x 116.1 x 128.3 in).
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 | 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 | 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 | 32,700 kg (71,940 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 under 1,200 mm (47.2 in) of swing
- 185 mm (7.3 in) bore on a 240 mm (9.4 in) bearing
- 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)
- 37 / 45 kW (49.6 / 60.3 hp) motor optional
Limitations
- 32,700 kg (71,940 lb), the heaviest ST lathe
- 11,667 x 2,950 mm (459.3 x 116.1 in) of floor
- Spindle speed of 1,000 rpm
- Two-axis turning only unless options are added
Best For
Frequently Asked Questions
01
Yes. It has the longest Z travel of the series, 6,050 mm (238.2 in), the largest frame with 1,200 mm (47.2 in) of swing over the bed, the D spindle, and the highest listed weight, 32,700 kg (71,940 lb).
02
Johnford's LC flat-bed heavy lathes. The LC-40, the smallest, has 1,010 mm (39.8 in) of swing over the bed and 640 mm (25.2 in) over the cross slide, with a bed 1,145 mm (45 in) wide.
03
A2-15 nose, 185 mm (7.3 in) bore, or 176 mm (6.9 in) with the geared headstock, 165 mm (6.5 in) of bar capacity, 240 mm (9.4 in) bearing diameter, four automatic speeds and 1,000 rpm.
04
11,667 x 2,950 mm (459.3 x 116.1 in) for the machine, with a height of 3,258 mm (128.3 in). Space for the chip conveyor trolley and for crane loading comes on top.
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