Johnford SL-50A-2S
Key Specifications
Max Spindle
Spindle Power
swing over bed
swing over cross slide
chuck size
bar capacity
How much does the Johnford SL-50A-2S cost?
Price estimate
We do not have a price for the Johnford SL-50A-2S 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
A 12 in, 22 / 26 kW (29.5 / 34.9 hp) main spindle and an 8 in sub-spindle, 500 mm (19.7 in) apart at most: the Johnford SL-50A-2S is the heavy short twin-spindle lathe of the SL range.
The first operation is where its strength lies. The main spindle has a Ø115 mm (Ø4.5 in) bore on a Ø160 mm (Ø6.3 in) bearing and a 2 step automatic transmission, the gearbox the lighter SL-50-2S does without. A forged or sawn blank can be roughed hard in the main chuck. The part then goes to the sub-spindle, which has 11 / 15 kW (14.8 / 20.1 hp) and 4,500 rpm, for the lighter back-side operations.
That asymmetry suits parts with one demanding side: gear blanks with a hub, bevel gear forgings, flanged bearing housings, wheel hubs. It suits bar less well than it might appear. Main bar capacity is Ø91 mm (Ø3.6 in), Ø102 mm (Ø4 in) as an option, but the sub-spindle bore passes only Ø51 mm (Ø2 in), so large bar parts are gripped on a turned diameter for transfer.
Main spindle speed is 3,000 rpm, or 2,800 rpm in the optional configuration. Swing over the cross slide is Ø450 mm (Ø17.7 in), or Ø380 mm (Ø15 in) with the Y-axis.
The machine weighs 6,500 kg (14,300 lb), the same as the SL-50-2S, and is a little longer at 4,675 mm (184.1 in).
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | Ø580 mm (Ø22.8 in) |
| Swing Over Cross Slide | Ø450 mm (Ø17.7 in) / Ø380 mm (Ø15 in) (Y-axis) |
| Chuck Size | 12 in (305 mm) |
| Bar Capacity | Ø91 mm (Ø3.6 in) / Ø102 mm (Ø4 in) (Opt.) |
| Spindle Nose | A2-8 / A2-11 (Opt.) |
| Spindle Bore | Ø115 mm (Ø4.5 in) |
| Spindle Transmission | 2 step Auto |
| Max Spindle Speed | 3,000 / 2,800 rpm (Opt.) |
| Spindle Motor Power | 22 / 26 kW (29.5 / 34.9 hp) |
| Spindle Bearing Diameter | Ø160 mm (Ø6.3 in) |
| Sub Spindle Chuck Size | 8 in (203 mm) |
| Sub Spindle Bar Capacity | Ø51 mm (Ø2 in) |
| Sub Spindle Nose | A2-6 |
| Sub Spindle Bore | Ø66 mm (Ø2.6 in) |
| Sub Spindle Transmission | One step |
| Sub Spindle Speed | 4,500 rpm |
| Sub Spindle Power | 11 / 15 kW (14.8 / 20.1 hp) |
| Sub Spindle Bearing Diameter | Ø100 mm (Ø3.9 in) |
| Turret Stations | 12 |
| X Axis Travel | 250 mm (9.8 in) |
| Y Axis Travel | ±40 mm (±1.6 in) |
| Z Axis Travel | 500 mm (19.7 in) |
| Rapid Traverse X1 Y Z1 Z2 | 15 / 10 / 18 / 18 m/min (591 / 394 / 709 / 709 ipm) |
| Servo Motor X | 3 kW; 4 kW with Y-axis |
| Servo Motor Y | 1.6 kW |
| Servo Motor Z1 Z2 | 4 kW |
| Power Turret Motor | 3.7 / 5.5 kW (5.0 / 7.4 hp) |
| Bed Inclination | 45° |
| Machine Weight | 6,500 kg (14,300 lb) |
| Machine Width Height | 2,100 x 2,120 mm (82.7 x 83.5 in) |
| Machine Length | 4,675 mm (184.1 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 22 / 26 kW (29.5 / 34.9 hp) main spindle with a 2 step Auto transmission
- 12 in main chuck, Ø115 mm (Ø4.5 in) bore
- 8 in sub-spindle with 11 / 15 kW (14.8 / 20.1 hp) at 4,500 rpm
- Main bar capacity of Ø91 mm (Ø3.6 in), Ø102 mm (Ø4 in) optional
- Short machine: 4,675 mm (184.1 in)
Limitations
- Sub-spindle passes only Ø51 mm (Ø2 in) bar
- 500 mm (19.7 in) of Z travel
- Swing over cross slide is Ø380 mm (Ø15 in) with the Y-axis
- Both spindles share one 12-position turret
Best For
Frequently Asked Questions
01
The larger A main spindle: a 12 in chuck, a Ø115 mm (Ø4.5 in) bore, Ø91 mm (Ø3.6 in) bar capacity and 22 / 26 kW (29.5 / 34.9 hp) with a 2 step Auto transmission. The SL-50-2S without the A has a 10 in chuck and 15 / 18.5 kW (20.1 / 24.8 hp).
02
11 / 15 kW (14.8 / 20.1 hp) at up to 4,500 rpm, with an 8 in chuck, an A2-6 nose and a Ø100 mm (Ø3.9 in) bearing diameter.
03
X 250 mm (9.8 in), Z1/Z2 500 mm (19.7 in) and, on the Y-axis version, Y ±40 mm (±1.6 in). Rapids are 15 / 10 / 18 / 18 m/min (591 / 394 / 709 / 709 ipm).
04
The SL-60A-2S has the same spindles with 900 mm (35.4 in) of Z travel; it is 5,540 mm (218.1 in) long and weighs 7,800 kg (17,160 lb).
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