Johnford ST-70BH
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-70BH cost?
Price estimate
We do not have a price for the Johnford ST-70BH 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
Two Johnford lathes share the A2-11 spindle and the 920 mm (36.2 in) swing but differ in almost everything along the bed: the Johnford ST-70BH, with 1,600 mm (63 in) of Z travel, and the ST-80B with 2,000 mm (78.7 in).
The ST-70BH is the quicker machine. Rapid traverse is 15 m/min on X and 18 m/min on Z, where the ST-80B manages 10 m/min and 12 m/min. It is also far lighter, 13,300 kg (29,260 lb) against 15,000 kg (33,000 lb) for the ST-80B, and shorter at 6,482 mm (255.2 in).
The ST-80B answers with its tailstock, whose quill is Ø200 mm (7.9 in) with an MT#7 taper; the quill here is Ø125 mm (4.9 in) with MT#5 and 125 mm (4.9 in) of travel. For a heavy shaft the larger center matters more than rapid speed. For lighter shafts of up to 1,600 mm (63 in), the ST-70BH does the same turning in less time and less floor.
Both have 7 kW axis motors, 370 mm (14.6 in) of X travel and the same spindle: 132.5 mm (5.2 in) bore, 116 mm (4.6 in) bar capacity, 2,000 rpm, 22 / 26 kW (29.5 / 34.9 hp) or optionally 30 / 37 kW (40.2 / 49.6 hp).
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | 920 mm (36.2 in) |
| Swing Over Cross Slide | 700 mm (27.6 in) |
| Chuck Size | 381 mm (15 in) |
| Chuck Size Optional | 450 mm (17.7 in) |
| Bar Capacity | 116 mm (4.6 in) |
| Spindle Nose | A2-11 |
| Spindle Bore | 132.5 mm (5.2 in) |
| Spindle Transmission | Auto 4 speeds |
| Max Spindle Speed | 2,000 rpm |
| Spindle Motor Power | 22 / 26 kW (29.5 / 34.9 hp) (Std.); 30 / 37 kW (40.2 / 49.6 hp) (Opt.) |
| Spindle Bearing Diameter | 180 mm (7.1 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 | 13,300 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 18 m/min Z rapid
- 920 mm (36.2 in) swing over the bed, 700 mm (27.6 in) over the cross slide
- 7 kW X and Z servo motors
- 13,300 kg (29,260 lb), much lighter than the ST-80B
- Tailstock travel of 1,300 mm (51.2 in)
Limitations
- Tailstock quill is Ø125 mm (4.9 in), MT#5
- Z travel stops at 1,600 mm (63 in)
- Bar capacity of 116 mm (4.6 in)
- Speed limited to 2,000 rpm
Best For
Frequently Asked Questions
01
The ST-70BH for speed and footprint, the ST-80B for length and heavy shafts. The ST-80B has 2,000 mm (78.7 in) of Z travel and a Ø200 mm (7.9 in) MT#7 quill but rapids of 10 m/min and 12 m/min, and weighs 15,000 kg (33,000 lb).
02
15 m/min on X, 18 m/min on Z and 10 m/min on the optional Y axis. The X and Z servo motors are 7 kW each, and the optional Y-axis motor is 3 kW.
03
The B spindle with an A2-11 nose, 132.5 mm (5.2 in) bore, 180 mm (7.1 in) bearing diameter and four automatic speeds to 2,000 rpm. The standard chuck is 381 mm (15 in).
04
6,482 x 2,290 x 2,765 mm (255.2 x 90.2 x 108.9 in), with a weight of 13,300 kg (29,260 lb). The bed is inclined at 60°.
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