Sienci Labs · read 1 November 2026
AltMill 4x8
- ✗ Router not included
- Closed-loop
What's in the box, and what you'll still need
Included, per the page
- The machine: frame, motion system and electronics
- Software named on the page: gSender
You'll still need
- A router or spindle. Not included
- Router bits, workholding (clamps) and a dust solution; no page in the record includes these in the base price.
Built from what the maker's page says is included. More in what's in the box.
Cost to start cutting
| Machine | $10,390.00 |
|---|---|
| AltMill 1.5KW ER20 spindle and dust shoe kit | $925.00 |
| Ready to cut, before bits and clamps | $11,315.00* |
The AltMill takes an 80 mm spindle; this is Sienci's own 1.5 kW kit. * One or more of these prices is shown without a currency. Bits, workholding, dust collection, software and a table aren't counted; add your own in the cost estimate. Accessory prices read 1 November 2026.
Work area to scale
Features
Published specs
From Sienci Labs's page for this machine, read 1 November 2026. Inch-to-millimetre conversions are mine.
| Spec | As published | Source |
|---|---|---|
| Price | $10,390.00* | product page |
| Price note | Shown as $10,390.00 with no currency label. Machine only. (* = currency not stated) | |
| Work area, as published | 1265 x 2640 x 210 mm | product page |
| X travel | 1,265 mm (49.8") | product page |
| Y travel | 2,640 mm (103.9") | product page |
| Z | 210 mm (8.3") | product page |
| Spindle / router | Not included | product page |
| Drive | Rack and pinion on Y; ballscrews on X and Z | product page |
| Linear motion | 15 mm linear rails | product page |
| Frame | Not published | |
| Controller and motors | SLB-Ext, grblHAL. Closed-loop NEMA 23 steppers. | product page |
| Software | gSender | product page |
| Footprint | About 66" x 114" | product page |
| Weight | 400 lb assembled (see spec notes) | product page |
| Warranty | 365 days | product page |
| Assembly | Not published |
Spec notes
3 spec notes
- Weight is 87 lb in one place and 400 lb in another.
- Power is 120VAC 4A in one place and 110VAC / 48VDC 10A in another.
- The machine is described as both partially and fully pre-assembled.
Not published on the page: frame, assembly. Owners talk about these machines on the Sienci Community Forum.
Similar machines
- InventablesX-Carve Pro 4x4$7,495.00
Photo: Inventables - MillRight CNCMega V 2 XXL (50x50)$4,449.00
Photo: MillRight CNC - Sienci LabsAltMill MK2 4x4$3,160.00*
Head-to-head
- Sienci Labs AltMill 4x8 vs Inventables X-Carve Pro 4x4
- Sienci Labs AltMill 4x8 vs Sienci Labs AltMill MK2 4x4
Page history
- 1 November 2026 First read from Sienci Labs's page and added to the record.
No price or spec changes recorded since then. When a figure changes, the old one is kept here with the date it was noticed.