Johnford ST-100BX
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-100BX cost?
Price estimate
We do not have a price for the Johnford ST-100BX 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
Large fabrications are the reason to choose a Johnford ST-100BX. It turns parts up to 1,000 mm (39.4 in) over the cross slide and 2,400 mm (94.5 in) long with a spindle of 2,000 rpm and 22 / 26 kW (29.5 / 34.9 hp).
Welded drums, rolled shells, large fabricated hubs: such parts have plenty of diameter and little solid metal. They need a light finishing cut on a few surfaces, bearing seats, sealing faces and flange faces, and they need it at a reasonable surface speed. A large frame with the smallest, fastest long-bed spindle does that job without the cost in speed of the C and D spindles.
Reaching those surfaces is the task of the X axis, which travels 520 mm (20.5 in) on a 7 kW servo motor.
The table lists the machine at 7,812 x 2,645 x 3,175 mm (307.6 x 104.1 x 125 in) and 16,700 kg (36,740 lb). Tailstock travel is 2,100 mm (82.7 in), on a Ø200 mm (7.9 in) quill with MT#7 taper. The spindle bore is 132.5 mm (5.2 in) and the chuck 381 mm (15 in), with 450 mm (17.7 in) as an option. A 30 / 37 kW (40.2 / 49.6 hp) motor can be ordered.
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | 1,200 mm (47.2 in) |
| Swing Over Cross Slide | 1,000 mm (39.4 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 | 520 mm (20.5 in) |
| Y Axis Travel Optional | ±75 mm (±3 in) |
| Z Axis Travel | 2,400 mm (94.5 in) |
| Rapid Traverse Rate | X: 10 m/min (394 ipm); Y: 10 m/min (394 ipm); Z: 12 m/min (472 ipm) |
| Tailstock Travel | 2,100 mm (82.7 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 | 16,700 kg (36,740 lb) |
| Machine Dimensions | 7,812 x 2,645 x 3,175 mm (307.6 x 104.1 x 125 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 1,000 mm (39.4 in) swing over the cross slide with 2,400 mm (94.5 in) of Z travel
- 2,000 rpm for finishing large, light parts
- 520 mm (20.5 in) of X travel
- Tailstock travel of 2,100 mm (82.7 in)
- 16,700 kg (36,740 lb) of machine weight
Limitations
- 22 / 26 kW (29.5 / 34.9 hp) limits heavy stock removal
- Chuck of 381 mm (15 in), or 450 mm (17.7 in) as an option
- Machine height of 3,175 mm (125 in)
- 116 mm (4.6 in) bar capacity
Best For
Frequently Asked Questions
01
1,200 mm (47.2 in) of swing over the bed and 1,000 mm (39.4 in) over the cross slide, with 2,400 mm (94.5 in) of Z travel and 520 mm (20.5 in) of X travel.
02
Its standard motor is 22 / 26 kW (29.5 / 34.9 hp), with 30 / 37 kW (40.2 / 49.6 hp) optional. For heavy roughing at large diameter, the ST-100CX has 30 / 37 kW (40.2 / 49.6 hp) as standard and a 510 mm (20.1 in) chuck.
03
04
7,812 x 2,645 x 3,175 mm (307.6 x 104.1 x 125 in). A chain type chip conveyor with trolley is part of the standard equipment.
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