Johnford ST-80B
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-80B cost?
Price estimate
We do not have a price for the Johnford ST-80B 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-80B is where the ST series changes frame. Z travel goes to 2,000 mm (78.7 in), and with it come a larger swing, heavier axis drives and a much bigger tailstock than the short ST-70B has.
The figures side by side: the ST-70B swings 600 mm (23.6 in) over the cross slide, has 4 kW servo motors and a Ø125 mm (4.9 in) MT#5 quill. The ST-80B swings 700 mm (27.6 in) over the cross slide and 920 mm (36.2 in) over the bed, drives X and Z with 7 kW motors and supports the work on a Ø200 mm (7.9 in) quill with an MT#7 taper and 150 mm (5.9 in) of travel. X travel grows to 370 mm (14.6 in).
One thing gets slower. Rapid traverse on this frame is 10 m/min on X and 12 m/min on Z, which is the price of moving a heavier carriage along a longer bed.
The spindle is the A2-11 B unit. It has a 132.5 mm (5.2 in) bore, 116 mm (4.6 in) of bar capacity, four automatic speeds and 2,000 rpm, with 22 / 26 kW (29.5 / 34.9 hp) as standard and 30 / 37 kW (40.2 / 49.6 hp) as an option. The machine weighs 15,000 kg (33,000 lb), the lightest of the long-bed ST lathes.
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 | 2,000 mm (78.7 in) |
| Rapid Traverse Rate | X: 10 m/min (394 ipm); Y: 10 m/min (394 ipm); Z: 12 m/min (472 ipm) |
| Tailstock Travel | 1,700 mm (66.9 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 | 15,000 kg (33,000 lb) |
| Machine Dimensions | 7,412 x 2,504 x 2,895 mm (291.8 x 98.6 x 114 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 2,000 mm (78.7 in) of Z travel and 1,700 mm (66.9 in) of tailstock travel
- Ø200 mm (7.9 in) tailstock quill with MT#7 taper
- 7 kW servo motors on X and Z
- 700 mm (27.6 in) swing over the cross slide, 370 mm (14.6 in) of X travel
- 2,000 rpm through four automatic speeds
Limitations
- Rapid traverse of 10 m/min on X and 12 m/min on Z
- 22 / 26 kW (29.5 / 34.9 hp) as standard on a 15,000 kg (33,000 lb) machine
- Bar capacity of 116 mm (4.6 in)
- Machine length of 7,412 mm (291.8 in)
Best For
Frequently Asked Questions
01
More than length. The ST-70B has 1,600 mm (63 in) of Z travel, 4 kW axis motors and a Ø125 mm (4.9 in) MT#5 tailstock quill. The ST-80B has 2,000 mm (78.7 in), 7 kW motors, a Ø200 mm (7.9 in) MT#7 quill and 700 mm (27.6 in) of swing over the cross slide.
02
Rapid traverse is 10 m/min on X, 12 m/min on Z and 10 m/min on the optional Y axis. The X and Z servo motors are 7 kW each; the optional Y-axis motor is 3 kW.
03
It is a programmable hydraulic tailstock with rotary quill. Quill diameter is Ø200 mm (7.9 in), quill travel 150 mm (5.9 in), taper MT#7, and the tailstock body travels 1,700 mm (66.9 in).
04
7,412 x 2,504 x 2,895 mm (291.8 x 98.6 x 114 in) and 15,000 kg (33,000 lb). The same length with the C spindle, the ST-80C, weighs 15,300 kg (33,660 lb).
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