Johnford ST-100CX
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-100CX cost?
Price estimate
We do not have a price for the Johnford ST-100CX 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-100CX has 2,400 mm (94.5 in) of Z travel under a swing of 1,200 mm (47.2 in) over the bed, with the A2-15 spindle and 17,000 kg (37,400 lb) of machine weight.
Cross travel is the figure to study here. At 520 mm (20.5 in) it is more than the radius of the 1,000 mm (39.4 in) swing over the cross slide, so a tool can travel from the largest diameter the carriage clears all the way to the center line. Facing a full-size part in one pass, or boring it and then turning its rim with tools on the same turret, needs exactly that.
A 12-position turret holds the tools. On parts of this size the tool overhangs are long, and the options include a boring bar holder on the turret carriage and an independent boring bar system.
The spindle delivers 30 / 37 kW (40.2 / 49.6 hp) through four automatic speeds, to 1,500 rpm as standard, 1,400 rpm in the optional version, or 1,200 rpm with the geared headstock. Bore is 152 mm (6 in), bar capacity 139 mm (5.5 in). The tailstock travels 2,100 mm (82.7 in). 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 | 139 mm (5.5 in) |
| Spindle Nose | A2-15 |
| Spindle Bore | 152 mm (6 in) |
| Spindle Transmission | Auto 4 speeds |
| Max Spindle Speed | 1,500 rpm (Std.); 1,400 rpm (Opt.) |
| Spindle Speed Geared Headstock | 1,200 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 | 200 mm (7.9 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 | 17,000 kg (37,400 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
- 520 mm (20.5 in) of X travel, from full swing to the center line
- 1,000 mm (39.4 in) swing over the cross slide and 2,400 mm (94.5 in) of Z travel
- 30 / 37 kW (40.2 / 49.6 hp) with four automatic speeds
- Boring bar holder and independent boring bar system available
- 152 mm (6 in) bore with 139 mm (5.5 in) bar capacity
Limitations
- Speed between 1,200 rpm and 1,500 rpm depending on the headstock
- Machine weight of 17,000 kg (37,400 lb)
- 3,175 mm (125 in) of height
- Boring bar equipment is optional
Best For
Frequently Asked Questions
01
At 520 mm (20.5 in) it covers the full radius of the 1,000 mm (39.4 in) swing over the cross slide, so one tool can face from the outside to the center. The ST-100CH has 420 mm (16.5 in) of X travel.
02
1,500 rpm as standard and 1,400 rpm as an option with the belt type gear box, and 1,200 rpm with the geared headstock. There are four automatic speeds.
03
04
A programmable hydraulic tailstock with a rotary quill of Ø200 mm (7.9 in), 150 mm (5.9 in) of quill travel, MT#7 taper and 2,100 mm (82.7 in) of tailstock travel.
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