Johnford ST-70CX
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-70CX cost?
Price estimate
We do not have a price for the Johnford ST-70CX 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-70CX is the biggest lathe Johnford builds on its short bed: 1,600 mm (63 in) of Z travel, 1,020 mm (40.2 in) of swing over the bed, the A2-15 spindle and a weight of 13,450 kg (29,590 lb).
It is a machine of two halves. At the headstock everything is heavy: a 510 mm (20.1 in) or 610 mm (24 in) chuck, a 200 mm (7.9 in) bearing, 30 / 37 kW (40.2 / 49.6 hp) and four automatic speeds. At the other end the tailstock is the light one of the short frames, with a Ø125 mm (4.9 in) quill, an MT#5 taper and 125 mm (4.9 in) of quill travel.
That matters for a workpiece of 800 mm (31.5 in) diameter and 1,600 mm (63 in) length, which can weigh a great deal. A part of that kind belongs on the ST-80CH, where the same swing comes with a Ø200 mm (7.9 in) MT#7 quill, 2,000 mm (78.7 in) of Z travel and 15,400 kg (33,880 lb) of machine. The ST-70CX is the right choice when the large swing is needed for shape, for hollow or fabricated parts, and not for sheer mass.
X travel is 420 mm (16.5 in); rapids are 12 m/min on X and 16 m/min on Z. Tailstock travel is 1,300 mm (51.2 in).
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | 1,020 mm (40.2 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 | 1,600 mm (63 in) |
| Rapid Traverse Rate | X: 12 m/min (472 ipm); Y: 10 m/min (394 ipm); Z: 16 m/min (630 ipm) |
| Tailstock Travel | 1,300 mm (51.2 in) |
| Tailstock Quill Travel | 125 mm (4.9 in) |
| Tailstock Quill Diameter | Ø125 mm (Ø4.9 in) |
| Tailstock Taper | MT#5 |
| Servo Motor X | 7 kW |
| Servo Motor Y Optional | 3 kW |
| Servo Motor Z | 7 kW |
| Bed Inclination | 60° |
| Machine Weight | 13,450 kg (29,590 lb) |
| Machine Dimensions | 6,482 x 2,290 x 2,765 mm (255.2 x 90.2 x 108.9 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 1,600 mm (63 in) of Z travel with 800 mm (31.5 in) swing over the cross slide
- A2-15 spindle with a 200 mm (7.9 in) bearing
- 30 / 37 kW (40.2 / 49.6 hp), optionally 37 / 45 kW (49.6 / 60.3 hp)
- Quicker rapids than the long beds: 12 m/min on X, 16 m/min on Z
- Machine length of 6,482 mm (255.2 in)
Limitations
- Light MT#5 tailstock quill for a machine of this swing
- Spindle speed no higher than 1,500 rpm
- Heaviest of the short-bed models at 13,450 kg (29,590 lb)
- Tailstock travel of 1,300 mm (51.2 in)
Best For
Frequently Asked Questions
01
Its headstock is, but its tailstock quill is Ø125 mm (4.9 in) with an MT#5 taper. For heavy parts between centers, the ST-80CH offers a Ø200 mm (7.9 in) MT#7 quill with the same 800 mm (31.5 in) of swing over the cross slide.
02
The C spindle: A2-15 nose, 152 mm (6 in) bore, 139 mm (5.5 in) bar capacity, 200 mm (7.9 in) bearing diameter and four automatic speeds, with 1,500 rpm from the standard belt-type gearbox.
03
13,450 kg (29,590 lb), the highest figure among the short-bed ST lathes. Outside dimensions are 6,482 x 2,290 x 2,765 mm (255.2 x 90.2 x 108.9 in).
04
420 mm (16.5 in) on X and 1,600 mm (63 in) on Z, at 12 m/min and 16 m/min. The optional Y axis travels ±75 mm (±3 in) at 10 m/min.
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