Johnford ST-240D
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-240D cost?
Price estimate
We do not have a price for the Johnford ST-240D 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
At 32,500 kg (71,500 lb) the Johnford ST-240D is the heaviest lathe on Johnford's page for the small-sized ST series, a name that covers machines up to 6,050 mm (238.2 in) of Z travel. This one has the longest bed and the largest spindle of that page together.
The figures at the two ends of the range show how wide it is. The ST-40A at the other end weighs 11,000 kg (24,200 lb), has 800 mm (31.5 in) of Z travel and turns at 3,000 rpm. The ST-240D has more than seven times the travel and a third of the speed, 1,000 rpm.
Its spindle is the D unit: A2-15 nose, 185 mm (7.3 in) bore, 165 mm (6.5 in) bar capacity, 240 mm (9.4 in) bearing diameter, four automatic speeds. Motors are 30 / 37 kW (40.2 / 49.6 hp) and, optionally, 37 / 45 kW (49.6 / 60.3 hp).
A six-metre machine does not have to remain a plain lathe. The options run from a C axis and a live tool turret to a B-axis milling/turning spindle for simultaneous 4 or 5 axis machining. Tailstock travel is 5,400 mm (212.6 in) and length 11,667 mm (459.3 in).
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 | 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 | 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 | 32,500 kg (71,500 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 D spindle
- 185 mm (7.3 in) bore and 165 mm (6.5 in) bar capacity
- Tailstock travel of 5,400 mm (212.6 in)
- B-axis milling/turning spindle listed as an option
- 37 / 45 kW (49.6 / 60.3 hp) motor available
Limitations
- Machine weight of 32,500 kg (71,500 lb)
- Spindle speed of 1,000 rpm
- Rapid traverse of 12 m/min on Z
- 700 mm (27.6 in) swing over the cross slide on a six-metre bed
Best For
Frequently Asked Questions
01
The ST-40A has 800 mm (31.5 in) of Z travel, a 304 mm (12 in) chuck, 3,000 rpm and 11,000 kg (24,200 lb). The ST-240D has 6,050 mm (238.2 in), a 510 mm (20.1 in) chuck, 1,000 rpm and 32,500 kg (71,500 lb).
02
Yes, through options: a 0.001° C axis for the main spindle, a 12-position live tool turret in VDI or BMT, Y-axis capability, and a B-axis milling/turning spindle for simultaneous 4 or 5 axis machining.
03
5,400 mm (212.6 in). The quill is Ø200 mm (7.9 in) in diameter with 150 mm (5.9 in) of travel and an MT#7 taper, and the tailstock is programmable.
04
11,667 x 2,504 x 2,895 mm (459.3 x 98.6 x 114 in). Machine weight is 32,500 kg (71,500 lb), so foundation and transport need early planning.
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