Johnford SL-80A
Image: johnford.com.tw, Johnford
Key Specifications
Max Spindle
Spindle Power
swing over bed
swing over cross slide
chuck size
bar capacity
How much does the Johnford SL-80A cost?
Price estimate
We do not have a price for the Johnford SL-80A 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
Two metres between chuck and centre: the Johnford SL-80A has 2,000 mm (78.7 in) of Z travel on the large SL bed, with a 12 in chuck and the 22 / 26 kW (29.5 / 34.9 hp) A spindle.
At this length the lathe becomes a shaft machine first and a chucker second. Typical parts are marine and industrial drive shafts, long hydraulic rods and cylinder tubes, printing and paper machine rolls, axles for rail and heavy vehicles. They are loaded by crane, driven by the chuck and supported at the far end by a tailstock that travels 1,700 mm (66.9 in). Its quill, Ø125 mm (Ø4.9 in) across, is as thick as some of the shafts it supports.
Swing over the cross slide is Ø540 mm (Ø21.3 in), so a roll body or a flange of half a metre clears the slide along the whole bed. That figure, not the Ø700 mm (Ø27.6 in) over the bed, is the one to check against the part drawing.
The spindle offers 3,000 rpm, or 2,800 rpm as the optional figure, through a 2 step automatic gearbox. Bar capacity is Ø91 mm (Ø3.6 in), Ø102 mm (Ø4 in) optionally, which matters when shaft blanks are fed through the Ø115 mm (Ø4.5 in) bore instead of being loaded between centres.
The SL-80A weighs 15,000 kg (33,000 lb) and is 6,930 mm (272.8 in) long. Floor space behind the headstock for long stock, and in front for the chip conveyor, comes on top of that.
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | Ø700 mm (Ø27.6 in) |
| Swing Over Cross Slide | Ø540 mm (Ø21.3 in) |
| 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) |
| Turret Stations | 12 |
| X Axis Travel | 295 mm (11.6 in) |
| Y Axis Travel | ±50 mm (±2 in) |
| Z Axis Travel | 2,000 mm (78.7 in); 1,900 mm (74.8 in) with Y-axis |
| Tailstock Travel | 1,700 mm (66.9 in); 1,600 mm (63 in) 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 | 15,000 kg (33,000 lb) |
| Machine Width Height | 2,430 x 2,510 mm (95.7 x 98.8 in) |
| Machine Length | 6,930 mm (272.8 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- 2,000 mm (78.7 in) of Z travel with 1,700 mm (66.9 in) of tailstock travel
- Ø540 mm (Ø21.3 in) swing over the cross slide along the whole bed
- Tailstock quill of Ø125 mm (Ø4.9 in), MT#5
- 22 / 26 kW (29.5 / 34.9 hp) 2 step geared spindle, Ø115 mm (Ø4.5 in) bore
- 15,000 kg (33,000 lb) machine with heavy box ways
Limitations
- 12 in chuck and 22 / 26 kW are modest for two-metre heavy shafts
- 6,930 mm (272.8 in) of machine length before stock and conveyor space
- No rapid traverse figure can be taken from the maker's table
- Steady rests are optional accessories
Best For
Frequently Asked Questions
01
Z travel is 2,000 mm (78.7 in), or 1,900 mm (74.8 in) with the Y-axis. The tailstock travels 1,700 mm (66.9 in), or 1,600 mm (63 in) with the Y-axis, and its quill adds 125 mm (4.9 in).
02
Swing over the cross slide is Ø540 mm (Ø21.3 in) and swing over the bed Ø700 mm (Ø27.6 in). X travel is 295 mm (11.6 in).
03
04
A Fanuc 0i-TF PLUS controller with a 10.4 in LCD and Manual Guide i as standard. Siemens SINUMERIK 828D, Fanuc 31i-MB PLUS and Siemens SINUMERIK ONE are optional.
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