Johnford SL-70A
Key Specifications
Max Spindle
Spindle Power
swing over bed
swing over cross slide
chuck size
bar capacity
How much does the Johnford SL-70A cost?
Price estimate
We do not have a price for the Johnford SL-70A 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-70A is the entry to the large-sized SL series, the frame with Ø700 mm (Ø27.6 in) of swing over the bed and Ø540 mm (Ø21.3 in) over the cross slide. Z travel is 1,550 mm (61 in) and the chuck is 12 in.
Put it next to the SL-65A and the purpose is plain. The spindle is identical: A2-8 nose, Ø115 mm (Ø4.5 in) bore, 22 / 26 kW (29.5 / 34.9 hp), 2 step automatic transmission, 3,000 rpm. Z differs by a few centimetres. What the 70 frame adds is room around the part, with 295 mm (11.6 in) of X travel, and a machine weight of 14,000 kg (30,800 lb) against the 11,000 kg (24,200 lb) of the SL-65A.
The tailstock is scaled up with the bed. Quill diameter is Ø125 mm (Ø4.9 in) and quill travel 125 mm (4.9 in), with MT#5 for the fixed centre and for the optional rotary quill. The Y-axis option has more stroke as well, ±50 mm (±2 in), and a 3.8 kW Y servo motor.
Buyers looking at this model are usually turning parts with a large flange or body on a moderately long shaft: rotor shafts, large couplings with hubs, rolls with journals, crane wheels on their axles. The 12 in chuck with Ø91 mm (Ø3.6 in) bar capacity can be raised to Ø102 mm (Ø4 in).
Note that the maker's table gives no usable rapid traverse figure for the large-sized models; the row is labelled in mm. The machine is 5,485 mm (216 in) long and 2,430 x 2,510 mm (95.7 x 98.8 in) in section.
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 | 1,550 mm (61 in); 1,450 mm (57.1 in) with Y-axis |
| Tailstock Travel | 1,200 mm (47.2 in); 1,100 mm (43.3 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 | 14,000 kg (30,800 lb) |
| Machine Width Height | 2,430 x 2,510 mm (95.7 x 98.8 in) |
| Machine Length | 5,485 mm (216 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- Ø540 mm (Ø21.3 in) swing over the cross slide and 295 mm (11.6 in) of X travel
- 22 / 26 kW (29.5 / 34.9 hp) spindle with a 2 step Auto transmission
- Tailstock quill of Ø125 mm (Ø4.9 in) with 125 mm (4.9 in) of travel
- 14,000 kg (30,800 lb) machine weight on a 45° bed
- Y-axis option with ±50 mm (±2 in) of travel
Limitations
- The spindle is no stronger than on the smaller SL-65A
- Rapid traverse cannot be read from the maker's table for this series
- Z travel of 1,550 mm (61 in) is the shortest of the large frame
- 2,510 mm (98.8 in) high and 5,485 mm (216 in) long
Best For
Frequently Asked Questions
01
Ø700 mm (Ø27.6 in) over the bed and Ø540 mm (Ø21.3 in) over the cross slide. X travel is 295 mm (11.6 in) and Z travel 1,550 mm (61 in), or 1,450 mm (57.1 in) with the Y-axis.
02
The SL-70B has a 15 in chuck, an A2-11 nose, a Ø132.5 mm (Ø5.2 in) bore, Ø116 mm (Ø4.6 in) bar capacity, a 4 step transmission and 2,000 rpm. The SL-70A has a 12 in chuck, an A2-8 nose, a Ø115 mm (Ø4.5 in) bore, a 2 step Auto transmission and 3,000 rpm. Bed, travels and weight are the same.
03
04
A programmable hydraulic tailstock is standard for this size. Travel is 1,200 mm (47.2 in), or 1,100 mm (43.3 in) with the Y-axis; the quill is Ø125 mm (Ø4.9 in) with 125 mm (4.9 in) of stroke and an MT#5 centre.
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