Johnford ST-100C
Key Specifications
Max Spindle
Rapid Traverse
Spindle Power
swing over bed
swing over cross slide
chuck size
How much does the Johnford ST-100C cost?
Price estimate
We do not have a price for the Johnford ST-100C 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
For the Johnford ST-100C the maker lists 2,400 mm of Z travel, 2,100 mm (82.7 in) of tailstock travel and a 510 mm (20.1 in) chuck on the A2-15 spindle.
Its speed row needs reading with care. The belt-type gearbox is given as 1,500 rpm standard and 1,400 rpm optional. The table does not say what the optional version is, but the chuck row offers a clue: the 610 mm (24 in) chuck is the listed chuck option, and a larger, heavier chuck normally carries a lower speed limit. A geared headstock, at 1,200 rpm, is the third possibility.
With 30 / 37 kW (40.2 / 49.6 hp) and four automatic speeds, the machine is equipped for heavy turning on diameters up to the 700 mm (27.6 in) swing over the cross slide. A 37 / 45 kW (49.6 / 60.3 hp) motor is available. Bar capacity is 139 mm (5.5 in) through a 152 mm (6 in) bore.
At 16,800 kg (36,960 lb) the ST-100C is slightly heavier than the ST-100B, which weighs 16,500 kg (36,300 lb), and well below the ST-130C at 20,300 kg (44,660 lb). Outside dimensions are 7,812 x 2,504 x 2,895 mm (307.6 x 98.6 x 114 in).
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | 920 mm (36.2 in) |
| Swing Over Cross Slide | 700 mm (27.6 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 | 370 mm (14.6 in) |
| Y Axis Travel Optional | ±75 mm (±3 in) |
| Z Axis Travel | 2,400 mm |
| 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 | 16,800 kg (36,960 lb) |
| Machine Dimensions | 7,812 x 2,504 x 2,895 mm (307.6 x 98.6 x 114 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 2,400 mm of Z travel with the A2-15 spindle
- 30 / 37 kW (40.2 / 49.6 hp) through four automatic speeds
- 139 mm (5.5 in) bar capacity
- Tailstock travel of 2,100 mm (82.7 in) on a Ø200 mm (7.9 in) quill
- 16,800 kg (36,960 lb), far lighter than the ST-130C
Limitations
- Speed of 1,500 rpm, or 1,400 rpm in the optional version
- X travel of 370 mm (14.6 in)
- 7,812 mm (307.6 in) of machine length
- The turret takes turning tools only as standard
Best For
Frequently Asked Questions
01
The table lists both figures for the belt type gear box without further explanation. The standard configuration reaches 1,500 rpm and the optional one 1,400 rpm; a geared headstock is listed separately at 1,200 rpm.
02
2,400 mm, the same as the ST-100B and ST-100D. The tailstock travels 2,100 mm (82.7 in) and X travel is 370 mm (14.6 in).
03
16,800 kg (36,960 lb). For comparison, the ST-80C weighs 15,300 kg (33,660 lb) and the ST-130C 20,300 kg (44,660 lb).
04
510 mm (20.1 in) as standard and 610 mm (24 in) as the option. The standard chuck is a 3-jaw hydraulic through-hole type supplied with one set of hard and soft jaws.
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