Johnford ST-70AH
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-70AH cost?
Price estimate
We do not have a price for the Johnford ST-70AH 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
Of Johnford's lathes with 1,600 mm (63 in) of Z travel, the Johnford ST-70AH has the quickest combination of spindle and axes: 3,000 rpm, 15 m/min on X and 18 m/min on Z, with 7 kW servo motors behind both axes.
It helps to place it between its neighbours. The ST-70A has the same spindle and rapids but 4 kW motors and 600 mm (23.6 in) of swing over the cross slide. The ST-70AX has more swing, 800 mm (31.5 in) over the cross slide, but its rapids drop to 12 m/min and 16 m/min. The ST-70AH sits in the middle at 700 mm (27.6 in) and keeps the higher rapid rates.
For production shaft work that mix is useful. Short positioning moves dominate the cycle on a part with many diameters and grooves, and a carriage that accelerates on 7 kW drives and traverses at 18 m/min shortens them.
The spindle has a 115 mm (4.5 in) bore, 91 mm (3.6 in) of bar capacity and 22 / 26 kW (29.5 / 34.9 hp) through an Auto Hi-Lo transmission. Tailstock travel is 1,300 mm (51.2 in) on an MT#5 quill. The machine weighs 13,200 kg (29,040 lb) and measures 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 | 920 mm (36.2 in) |
| Swing Over Cross Slide | 700 mm (27.6 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 | 370 mm (14.6 in) |
| Y Axis Travel Optional | ±75 mm (±3 in) |
| Z Axis Travel | 1,600 mm (63 in) |
| Rapid Traverse Rate | X: 15 m/min (591 ipm); Y: 10 m/min (394 ipm); Z: 18 m/min (709 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 | 13,200 kg (29,040 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 at up to 3,000 rpm
- Rapids of 15 m/min on X and 18 m/min on Z with 7 kW servo motors
- 700 mm (27.6 in) swing over the cross slide
- Tailstock travel of 1,300 mm (51.2 in)
- Y axis of ±75 mm (±3 in) available
Limitations
- 22 / 26 kW (29.5 / 34.9 hp) is the only motor listed
- Tailstock quill of Ø125 mm (4.9 in) with MT#5 taper
- Standard bar capacity of 91 mm (3.6 in)
- Steady rests are optional
Best For
Frequently Asked Questions
01
The ST-70A swings 600 mm (23.6 in) over the cross slide with 4 kW axis motors. The ST-70AH swings 700 mm (27.6 in) with 7 kW motors and the same 15 m/min and 18 m/min rapids. The ST-70AX swings 800 mm (31.5 in), with rapids of 12 m/min and 16 m/min.
02
Rapid traverse is 15 m/min on X, 18 m/min on Z and 10 m/min on the optional Y. X and Z have 7 kW servo motors; the optional Y motor is 3 kW.
03
13,200 kg (29,040 lb). Outside dimensions are 6,482 x 2,290 x 2,765 mm (255.2 x 90.2 x 108.9 in), on a 60° slant bed.
04
A Fanuc 0i-TF PLUS control, a belt-type gearbox, a 3-jaw hydraulic through-hole chuck, a 12-position turning tool turret with one set of turning tools, a programmable hydraulic tailstock with rotary quill and a chain type chip conveyor with trolley.
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