Johnford ST-100DX
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-100DX cost?
Price estimate
We do not have a price for the Johnford ST-100DX 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-100DX has 2,400 mm (94.5 in) of Z travel, 1,200 mm (47.2 in) of swing over the bed and the D spindle with 165 mm (6.5 in) of bar capacity. It weighs 17,200 kg (37,840 lb).
Take a large flanged pipe spool as the example part. The pipe section passes into the 185 mm (7.3 in) bore; the flange, far larger, spins inside the swing. Facing that flange from rim to bore needs cross travel, and 520 mm (20.5 in) is available. Cutting a gasket groove or a raised face at a large radius needs low spindle speed with torque, which the four automatic speeds and 30 / 37 kW (40.2 / 49.6 hp) provide. The 1,000 rpm limit is no handicap at such diameters.
If the spool is long, the far end rests on the tailstock, which travels 2,100 mm (82.7 in) and has a Ø200 mm (7.9 in) quill with MT#7 taper.
The spindle bearing is 240 mm (9.4 in) and the nose A2-15, with a 510 mm (20.1 in) chuck. A geared headstock with a 176 mm (6.9 in) bore and a 37 / 45 kW (49.6 / 60.3 hp) motor are listed alternatives. Outside dimensions are 7,812 x 2,645 x 3,175 mm (307.6 x 104.1 x 125 in).
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 | 510 mm (20.1 in) |
| Chuck Size Optional | 610 mm (24 in) |
| Bar Capacity | 165 mm (6.5 in) |
| Spindle Nose | A2-15 |
| Spindle Bore | 185 mm (7.3 in) / Geared headstock 176 mm (6.9 in) |
| Spindle Transmission | Auto 4 speeds |
| Max Spindle Speed | 1,000 rpm |
| Spindle Speed Geared Headstock | 1,000 rpm |
| Spindle Motor Power | 30 / 37 kW (40.2 / 49.6 hp) (Std.); 37 / 45 kW (49.6 / 60.3 hp) (Opt.) |
| Spindle Bearing Diameter | 240 mm (9.4 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 | 17,200 kg (37,840 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
- 165 mm (6.5 in) bar capacity with 1,000 mm (39.4 in) swing over the cross slide
- 520 mm (20.5 in) of X travel for facing large flanges
- Four automatic speeds on 30 / 37 kW (40.2 / 49.6 hp)
- 2,400 mm (94.5 in) of Z travel
- 240 mm (9.4 in) spindle bearing
Limitations
- Spindle speed limited to 1,000 rpm
- Machine weight of 17,200 kg (37,840 lb)
- 3,175 mm (125 in) of machine height
- Geared headstock bore of 176 mm (6.9 in)
Best For
Frequently Asked Questions
01
Its figures fit that work: 165 mm (6.5 in) of bar capacity through a 185 mm (7.3 in) bore, 1,000 mm (39.4 in) of swing over the cross slide and 520 mm (20.5 in) of X travel for facing.
02
03
1,000 rpm, with four automatic speeds. The table lists the same figure for the belt type gear box and the geared headstock.
04
520 mm (20.5 in) on X and 2,400 mm (94.5 in) on Z, with 2,100 mm (82.7 in) of tailstock travel. Rapid traverse is 10 m/min on X and 12 m/min on Z.
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