Johnford SL-80B
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-80B cost?
Price estimate
We do not have a price for the Johnford SL-80B 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-80B is a two-metre big-bore lathe: 2,000 mm (78.7 in) of Z travel, a 15 in chuck and a spindle bore of Ø132.5 mm (Ø5.2 in) that passes Ø116 mm (Ø4.6 in) stock.
Pipe threading shows what the combination is for. A joint of pipe or a tubular blank is loaded through the bore until the end to be machined stands in front of the chuck. The 12-position turret then faces, bores, turns the seal diameter and cuts the thread in one cycle, at spindle speeds well under the 2,000 rpm maximum. When the part is shorter than two metres it can instead run between chuck and tailstock, which travels 1,700 mm (66.9 in), and be machined along its length.
Thread cutting at large diameter needs a spindle that holds speed under load at low rpm. The 4 step transmission and the Ø180 mm (Ø7.1 in) spindle bearing serve that purpose, with 22 / 26 kW (29.5 / 34.9 hp) at the motor. The nose is A2-11.
For coolant, the standard is an external supply at 4 bar. Boring and threading inside a tube benefit from the optional high pressure supply through the turret, 20 bar or above with cartridge filtration, which flushes chips out of the bore.
Bed data are those of the frame: Ø700 mm (Ø27.6 in) over the bed, Ø540 mm (Ø21.3 in) over the cross slide, 295 mm (11.6 in) of X. The machine is 6,930 mm (272.8 in) long and weighs 15,000 kg (33,000 lb).
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 | 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
- Ø116 mm (Ø4.6 in) bar capacity with 2,000 mm (78.7 in) of Z travel
- 4 step transmission and A2-11 spindle for low-speed threading
- Tailstock travel of 1,700 mm (66.9 in), Ø125 mm (Ø4.9 in) quill
- 15 in chuck and Ø540 mm (Ø21.3 in) swing over the cross slide
- Optional coolant through the turret at 20 bar or above
Limitations
- External coolant at 4 bar is the standard supply
- Top speed of 2,000 rpm, against 3,000 rpm on the SL-80A
- Stock longer than the machine needs support behind the spindle, which the accessory list does not name
- 6,930 mm (272.8 in) long, 15,000 kg (33,000 lb)
Best For
Frequently Asked Questions
01
Bar capacity is Ø116 mm (Ø4.6 in) and the spindle bore is Ø132.5 mm (Ø5.2 in). Larger diameters can be held in the 15 in chuck and turned over the bed, up to Ø540 mm (Ø21.3 in) over the cross slide.
02
2,000 rpm maximum with a 22 / 26 kW (29.5 / 34.9 hp) motor and a 4 step transmission. The spindle bearing diameter is Ø180 mm (Ø7.1 in).
03
The SL-80A 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. The SL-80B has the 15 in chuck, the Ø132.5 mm (Ø5.2 in) bore, 4 steps and 2,000 rpm. Length, travels and the 15,000 kg (33,000 lb) weight are shared.
04
An external coolant supply system at 4 bar is standard. A high pressure coolant supply through the turret at 20 bar or above, with a cartridge type filtration system, is an optional accessory.
More from Johnford
Other CNC Lathes / Turning Centers
TOS Kuřim SKD-D
Accuway UT-300LX3
DMG Mori CLX 350
Takisawa TK-2600
DN Solutions PUMA GT 3100 L
