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Sienci Labs · read 1 November 2026
AltMill MK2 4x4
- Ballscrew
- Bring your own router
- Closed-loop motors
$3,160.00*
- Work area
- 1245 × 1245 mm
- Z
- 140 mm (5.5")
- Drive
- Ballscrew
- Spindle
- Not included
- Warranty
- 120 days from receipt
Work area to scale
Features
Spindle / router
Not included; standard 80 mm spindle mount only. Optional 1.5 kW and 2.2 kW ER20 spindle kits and a 2.2 kW ATC kit.
Size
"49″ x 49″ working area with a max Z-height of 5.5″". Millimetres converted by me.
Published specs
From Sienci Labs's page for this machine, read 1 November 2026. Inch-to-millimetre conversions are mine.
| Price | $3,160.00* |
|---|---|
| Price note | Shown as $3,160.00 with no currency label, which is less than the 2x4 page's $3,890.00 on the same day. Machine only. (* = currency not stated) |
| Work area, as published | "49″ x 49″ working area with a max Z-height of 5.5″". Millimetres converted by me. |
| X travel | 1,245 mm (49.0") |
| Y travel | 1,245 mm (49.0") |
| Z | 140 mm (5.5") |
| Spindle / router | Not included; standard 80 mm spindle mount only. Optional 1.5 kW and 2.2 kW ER20 spindle kits and a 2.2 kW ATC kit. |
| Drive | Ballscrews on all axes |
| Linear motion | HGR15 linear guides on all axes |
| Frame | Described as a "rigid frame"; material not published |
| Controller and motors | SLB-EXT controller with e-stop. Closed-loop steppers; "over 600IPM". |
| Software | Not published |
| Footprint | 59″ wide × 62″ deep |
| Weight | 76 lb |
| Warranty | 120 days from receipt |
| Assembly | Not published |
Where the page contradicts itself
None found on this reading.
Not published
The page doesn't give: software, assembly. I'll add missing figures with their source if I find them on another page from the same maker. Owners discuss this maker's machines on the Sienci Community Forum.
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