Johnford ST-70AX
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-70AX cost?
Price estimate
We do not have a price for the Johnford ST-70AX 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
A fast, small spindle under a very large swing, on the longest of the short beds: the Johnford ST-70AX has 1,600 mm (63 in) of Z travel, 1,020 mm (40.2 in) of swing over the bed and a top speed of 3,000 rpm.
Parts that call for this are long and carry something wide. A rotor shaft with a disc, a fan shaft with its hub, a welded shaft with flanges: the shaft itself fits a 304 mm (12 in) chuck and wants speed, while the widest feature needs the 800 mm (31.5 in) of swing over the cross slide to pass the carriage.
The tailstock travels 1,300 mm (51.2 in) and holds the far end on an MT#5 center in a Ø125 mm (4.9 in) quill. That is adequate for light assemblies, less so for heavy ones, and steady rests are available as options.
The drive is 22 / 26 kW (29.5 / 34.9 hp) with an Auto Hi-Lo transmission. X travel is 420 mm (16.5 in), and rapids are 12 m/min on X and 16 m/min on Z. Machine weight is 13,300 kg (29,260 lb); outside dimensions are 6,482 x 2,290 x 2,765 mm (255.2 x 90.2 x 108.9 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 | 304 mm (12 in) |
| Chuck Size Optional | 381 mm (15 in) |
| Bar Capacity | 91 mm (3.6 in) (Std.); 102 mm (4 in) (Opt.) |
| Spindle Nose | A2-8 / A2-11 (Opt.) |
| Spindle Bore | 115 mm (4.5 in) |
| Spindle Transmission | Auto Hi-Lo |
| Max Spindle Speed | 3,000 rpm for 12 in (91) chuck; 2,800 rpm for 12 in (102) chuck; 2,500 rpm for 15 in (102) chuck |
| Spindle Motor Power | 22 / 26 kW (29.5 / 34.9 hp) |
| Spindle Bearing Diameter | 160 mm (6.3 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 | 13,300 kg (29,260 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
- A spindle with a top speed of 3,000 rpm
- 420 mm (16.5 in) of X travel on a 7 kW servo motor
- Tailstock travel of 1,300 mm (51.2 in)
- Manual or hydraulic self-centering steady rests available
Limitations
- MT#5 quill of Ø125 mm (4.9 in) on a 1,600 mm (63 in) bed
- 22 / 26 kW (29.5 / 34.9 hp) is the only motor
- Standard chuck of 304 mm (12 in)
- Z rapid of 16 m/min, against 18 m/min on the ST-70AH
Best For
Frequently Asked Questions
01
A long part with one wide feature. Z travel is 1,600 mm (63 in), swing over the cross slide 800 mm (31.5 in) and spindle speed up to 3,000 rpm with the standard 304 mm (12 in) chuck.
02
The ST-70A swings 790 mm (31.1 in) over the bed and 600 mm (23.6 in) over the cross slide, with 320 mm (12.6 in) of X travel and 4 kW axis motors. The ST-70AX swings 1,020 mm (40.2 in) and 800 mm (31.5 in), with 420 mm (16.5 in) of X and 7 kW motors.
03
1,300 mm (51.2 in), with 125 mm (4.9 in) of quill travel. The quill is Ø125 mm (4.9 in) with an MT#5 taper, and the tailstock is programmable and hydraulic.
04
6,482 x 2,290 x 2,765 mm (255.2 x 90.2 x 108.9 in), at 13,300 kg (29,260 lb). The bed is a 60° slant type with a chain type chip conveyor.
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