Akira Seiki SL40
Image: akiraseiki.com, Akira Seiki
Key Specifications
Max Spindle
Spindle Power
Max Turn Length
control
axes configuration
swing over bed
How much does the Akira Seiki SL40 cost?
Price estimate
We do not have a price for the Akira Seiki SL40 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 Akira Seiki SL40 is the big-bore, geared-head lathe of the SL line. It carries a 15" chuck as standard and an 18" chuck as an option on an A2-11 spindle nose, with a 103 mm (4.1 in) draw tube bore. Peak torque is 2,944 Nm (2,171 lb-ft), which the table marks as coming through a gear box, and peak power is 60 HP (44.7 kW).
Those figures put it in a different class from the SL35 and its 727 Nm (536 lb-ft). Top speed drops to 2,500 rpm accordingly. This is a machine for large-diameter work in steel: maximum cutting diameter is 550 mm (21.7 in), cutting length 950 mm (37.4 in), and swing over the bed 750 mm (29.5 in).
Tooling is larger as well. OD tools are 32 mm (1.26 in) and boring bars 50 mm (1.97 in), on a 12-station turret that indexes in 0.5 s. X travel is 285 + 25 mm (11.2 + 1 in), Z travel 975 mm (38.4 in). The X axis rapids at 30 m/min (1,181 ipm) and Z at 36 m/min (1,417 ipm).
The tailstock has 975 mm (38.4 in) of travel and an MT5 quill with a 100 mm (3.9 in) stroke. Weight is listed as 6,700 kg (14,771 lb), dimensions as 3,900 x 2,165 mm (154 x 85 in), and the power requirement as 35 kVA.
Full Specifications
| Parameter | Value |
|---|---|
| CNC Control | AKIRA Mi:845 (Fanuc G code compatible) |
| Axes Configuration | X+Z |
| Swing Over Bed | 750 mm (29.5 in) |
| Swing Over Cross Slide | 550 mm (21.7 in) |
| Max Turning Diameter | 550 mm (21.7 in) |
| Max Turning Length | 950 mm (37.4 in) |
| Chuck Size | 15" STD; 18" OPT |
| Draw Tube Bore | 103 mm (4.1 in) |
| Max Spindle Speed | 2,500 rpm |
| Spindle Motor Power | 60 HP (44.7 kW) |
| Spindle Torque | 2,944 Nm (2,171 lb-ft) (gear box) |
| Spindle Nose | A2-11 |
| X Axis Travel | 285 + 25 mm (11.2 + 1 in) |
| Z Axis Travel | 975 mm (38.4 in) |
| Rapid Traverse Xz | X 30 m/min (1,181 ipm), Z 36 m/min (1,417 ipm) |
| Cutting Feed Rate | 10 m/min (394 ipm) |
| Turret Stations | 12 |
| OD Tool Size | 32 mm (1.26 in) |
| Boring Bar Shank | 50 mm (1.97 in) |
| Turret Index Time | 0.5 s |
| Quill Travel | 100 mm (3.9 in) |
| Tailstock Travel | 975 mm (38.4 in) |
| Quill Taper | MT5 |
| Chip Disposal | Drawer (STD); Conveyor (OPT) |
| Power Requirement | 35 kVA |
| Machine Dimensions | 3,900 x 2,165 mm (154 x 85 in) |
| Machine Weight | 6,700 kg (14,771 lb) |
Specifications sourced from akiraseiki.com — verified 2026-10-04
Strengths & Limitations
Strengths
- 2,944 Nm (2,171 lb-ft) of peak torque through a gear box
- 60 HP (44.7 kW) peak spindle power
- 103 mm (4.1 in) draw tube bore; 15" chuck with an 18" option
- MT5 tailstock with 975 mm (38.4 in) of travel
- 50 mm (1.97 in) boring bars and 32 mm (1.26 in) OD tools
Limitations
- Top speed of 2,500 rpm, the lowest in the SL range
- X rapid of 30 m/min (1,181 ipm), slower than the 36 m/min of the smaller SL lathes
- Turret index of 0.5 s, against 0.35 s on the SL35
- Chip conveyor is optional on a machine that makes heavy chips
Best For
Frequently Asked Questions
01
2,500 rpm maximum speed, 60 HP (44.7 kW) peak power and 2,944 Nm (2,171 lb-ft) peak torque, with the note gear box. The spindle nose is A2-11.
02
15" as standard and 18" as an option. The draw tube bore is 103 mm (4.1 in), and the swing over the cross slide is 550 mm (21.7 in).
03
Up to 550 mm (21.7 in) in diameter and 950 mm (37.4 in) in length. The SL40L extends the cutting length to 1,500 mm (59 in).
04
The table lists 6,700 kg (14,771 lb), with dimensions of 3,900 x 2,165 mm (154 x 85 in) and a power requirement of 35 kVA.
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