Johnford SL-120B
Key Specifications
Max Spindle
Spindle Power
swing over bed
swing over cross slide
chuck size
bar capacity
How much does the Johnford SL-120B cost?
Price estimate
We do not have a price for the Johnford SL-120B 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 SL-120B is the largest lathe of the SL series by every measure the table offers: 3,000 mm (118.1 in) of Z travel, a 15 in chuck, a Ø132.5 mm (Ø5.2 in) bore and a 4 step transmission.
It is the model for long, heavy tubular work. Drill pipe and collars, casing, line pipe sections, long hydraulic cylinders and hollow rolls can be turned between the chuck and a tailstock that travels 2,700 mm, or fed through the spindle, which takes stock up to Ø116 mm (Ø4.6 in). The 22 / 26 kW (29.5 / 34.9 hp) motor works through the four steps up to 2,000 rpm on an A2-11 nose with a Ø180 mm (Ø7.1 in) bearing.
Beyond this point Johnford's range changes character. Its larger horizontal lathes are the ST series and the flat-bed LC series, which are different designs; within the 45° SL family, three metres with the B spindle is the limit.
Two printing slips affect this model's data, and they are worth knowing before comparing quotations. The weight is given as 17,000 kg with an inch value where the pound figure belongs. The tailstock travel carries an inch figure that does not convert from 2,700 mm. On this page both rows show the metric value only.
Other figures are consistent with the rest of the frame: Ø700 mm (Ø27.6 in) swing over the bed, Ø540 mm (Ø21.3 in) over the cross slide, 295 mm (11.6 in) of X, ±50 mm (±2 in) of Y on the Y-axis version, 7,485 mm (294.7 in) of length.
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | Ø700 mm (Ø27.6 in) |
| Swing Over Cross Slide | Ø540 mm (Ø21.3 in) |
| Chuck Size | 15 in (381 mm) |
| Bar Capacity | Ø116 mm (Ø4.6 in) |
| Spindle Nose | A2-11 |
| Spindle Bore | Ø132.5 mm (Ø5.2 in) |
| Spindle Transmission | 4 step |
| Max Spindle Speed | 2,000 rpm |
| Spindle Motor Power | 22 / 26 kW (29.5 / 34.9 hp) |
| Spindle Bearing Diameter | Ø180 mm (Ø7.1 in) |
| Turret Stations | 12 |
| X Axis Travel | 295 mm (11.6 in) |
| Y Axis Travel | ±50 mm (±2 in) |
| Z Axis Travel | 3,000 mm (118.1 in); 2,900 mm (114.1 in) with Y-axis |
| Tailstock Travel | 2,700 mm; 2,600 mm with Y-axis |
| Tailstock Quill Travel | 125 mm (4.9 in) |
| Tailstock Quill Diameter | Ø125 mm (Ø4.9 in) |
| Tailstock Taper Fixed | MT#5 |
| Tailstock Taper Rotary | MT#5 (Opt.) |
| Servo Motor X | 3 kW; 4 kW with Y-axis |
| Servo Motor Y | 3.8 kW |
| Servo Motor Z | 4 kW |
| Power Turret Motor | 3.7 / 5.5 kW (5.0 / 7.4 hp) |
| Bed Inclination | 45° |
| Machine Weight | 17,000 kg |
| Machine Width Height | 2,430 x 2,510 mm (95.7 x 98.8 in) |
| Machine Length | 7,485 mm (294.7 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 3,000 mm (118.1 in) of Z travel with the big-bore B spindle
- Ø116 mm (Ø4.6 in) bar capacity through a Ø132.5 mm (Ø5.2 in) bore
- 4 step transmission, A2-11 nose, Ø180 mm (Ø7.1 in) bearing
- Tailstock travel of 2,700 mm with an Ø125 mm (Ø4.9 in) quill
- 45° bed with a full enclosure for the machining area
Limitations
- Two rows of the maker's table for this model carry wrong bracket values
- 2,000 rpm and 22 / 26 kW (29.5 / 34.9 hp), no stronger than the SL-70B
- 7,485 mm (294.7 in) long before any stock support behind the spindle
- Steady rests are optional accessories
Best For
Frequently Asked Questions
01
Z travel is 3,000 mm (118.1 in), or 2,900 mm (114.1 in) with the Y-axis. Tailstock travel is 2,700 mm, or 2,600 mm with the Y-axis. Stock up to Ø116 mm (Ø4.6 in) can also pass through the spindle.
02
17,000 kg according to the maker's table. The bracket beside that figure contains an inch value by mistake, so no pound figure is given. The SL-100B weighs 16,000 kg (35,200 lb).
03
An A2-11 nose with a Ø132.5 mm (Ø5.2 in) bore and a Ø180 mm (Ø7.1 in) bearing, a 4 step transmission, a 22 / 26 kW (29.5 / 34.9 hp) motor and a top speed of 2,000 rpm. Chuck size is 15 in.
04
The SL-120A has a 12 in chuck, a Ø115 mm (Ø4.5 in) bore, Ø91 mm (Ø3.6 in) bar capacity, a 2 step Auto transmission and 3,000 rpm. Bed length, swing and the 7,485 mm (294.7 in) machine length are the same on both.
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