Akira Seiki SL20 UHP
Image: akiraseiki.com, Akira Seiki
Key Specifications
Max Spindle
Max Turn Length
Accuracy
Repeatability
control
swing over bed
How much does the Akira Seiki SL20 UHP cost?
Price estimate
We do not have a price for the Akira Seiki SL20 UHP 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 SL20 UHP is listed among the maker's special purpose machines as a super performance turning center. Akira Seiki states its aim plainly: turning instead of grinding, to shorten the production process. In other words it is an SL20-size lathe intended for finish turning to tolerances that would otherwise go to a grinder.
In capacity it follows the SL20 closely. Swing over the bed is 450 mm (17.7 in), maximum cutting diameter 280 mm (11.0 in), maximum cutting length 330 mm (13.0 in), with a 6" chuck on an A2-5 nose and a top speed of 6,000 rpm. X travel is 150 + 15 mm (5.9 + 0.6 in) and Z travel 350 mm (13.8 in).
One figure differs clearly: the draw tube bore is ∅24 mm (∅0.9 in), against 45 mm (1.8 in) on the SL20. A smaller bore usually goes with a stiffer spindle and bearing arrangement, which fits the stated purpose, though the table does not describe the spindle construction. No power or torque figure is given.
The page lists positioning accuracy of 0.01 mm (0.00039 in) and repeatability of ±0.003 mm (±0.00012 in). The turret has 10T, with ∅20 mm (∅0.8 in) OD holders and ∅25 mm (∅1.0 in) boring holders, and the tailstock has an MT3 quill. Weight is 2,600 kg (5,732 lb); power requirement is 22 kVA.
Full Specifications
| Parameter | Value |
|---|---|
| CNC Control | AKIRA Mi845 (FANUC G CODE COMPATIBLE) |
| Swing Over Bed | 450 mm (17.7 in) |
| Max Turning Diameter | 280 mm (11.0 in) |
| Max Turning Length | 330 mm (13.0 in) |
| Chuck Size | 6" |
| Draw Tube Bore | ∅24 mm (∅0.9 in) |
| X Axis Travel | 150 + 15 mm (5.9 + 0.6 in) |
| Z Axis Travel | 350 mm (13.8 in) |
| Spindle Nose | A2-5 |
| Max Spindle Speed | 6,000 rpm |
| Rapid Traverse Xz | 36 m/min (1,417 ipm) |
| Cutting Feed Rate | 10 m/min (394 ipm) |
| Turret Stations | 10T |
| OD Tool Holder | ∅20 mm (∅0.8 in) |
| Boring Bar Shank | ∅25 mm (∅1.0 in) |
| Quill Travel | 80 mm (3.1 in) |
| Tailstock Travel | 210 mm (8.3 in) |
| Quill Taper | MT3 |
| Positioning Accuracy | 0.01 mm (0.00039 in) |
| Repeatability | ±0.003 mm (±0.00012 in) |
| Coolant Tank Capacity | 120 L (31.7 gal) |
| Chip Disposal | Drawer (STD) / Conveyor (OPT) |
| Power Requirement | 22 kVA |
| Floor Space | 1,770 x 1,338 mm (69.7 x 52.7 in) |
| Machine Weight | 2,600 kg (5,732 lb) |
Specifications sourced from akiraseiki.com — verified 2026-10-04
Strengths & Limitations
Strengths
- Built for turning in place of grinding, per the maker
- Repeatability listed at ±0.003 mm (±0.00012 in)
- 6,000 rpm A2-5 spindle with a 6" chuck
- Tailstock with MT3 quill and 210 mm (8.3 in) of travel
- Floor space of 1,770 x 1,338 mm (69.7 x 52.7 in)
Limitations
- Draw tube bore of only ∅24 mm (∅0.9 in)
- No spindle power or torque figure is published
- The table does not explain what makes the machine more accurate than the SL20
- Maximum cutting length of 330 mm (13.0 in)
Best For
Frequently Asked Questions
01
Akira Seiki describes it as meeting the need for turning instead of grinding, to shorten the production process. It is listed under special purpose machines, separately from the standard SL20.
02
Capacity is close, but the SL20 UHP has a ∅24 mm (∅0.9 in) draw tube bore where the SL20 has 45 mm (1.8 in), and its maximum cutting diameter is 280 mm (11.0 in) against 290 mm (11.4 in) on the SL20.
03
Positioning 0.01 mm (0.00039 in) and repeatability ±0.003 mm (±0.00012 in). The table gives no roundness or surface finish figures, so ask for test-cut data on the material in question.
04
X travel is 150 + 15 mm (5.9 + 0.6 in) and Z travel 350 mm (13.8 in). Rapid feed is 36 m/min (1,417 ipm) and cutting feed 10 m/min (394 ipm).
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