Image: Sienci Labs
Sienci Labs AltMill 4x8
Sienci Labs
Best for: Small shops needing full-sheet capacity and willing to provide the spindle, wasteboard and extraction
Typical starting price
$10,390Editorial baseline for this machine
Overall score
Best current buying path
Where to buy
Prices change often: compare the stores below
- Shipping varies by retailer
- Check manufacturer site for availability
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Quick verdict
The AltMill 4x8 is Sienci's full-sheet model, with rack-and-pinion Y drive, ball screws on X and Z, closed-loop motors and grblHAL control. It includes legs and works with gSender. The maker gives about 400 lb assembled weight before add-ons. Supply a spindle, wasteboard and dust extraction, and check the floor space and electrical requirements for the selected spindle. Its stated 203 mm stock clearance is separate from Z travel and will be affected by tooling and workholding.
Who this fits best
Small shops needing full-sheet capacity and willing to provide the spindle, wasteboard and extraction
Buy this if
Small shops needing full-sheet capacity and willing to provide the spindle, wasteboard and extraction. Full 4 by 8 foot sheet capacity without tiling.
Skip this if
Large floor footprint; approximately 181 kg before add-ons, and rack and pinion gives up some precision to ball screws on the long axis.
What else you still need
A spindle, wasteboard, cutters, workholding, computer and dust extraction. Legs are included. Provide the circuit required by the chosen spindle and controller.
Material reality check
Full-sheet plywood and MDF are intended applications; the maker also lists aluminum. Actual cutting results depend on tooling, setup and spindle choice.
Better alternative if...
you do not need full sheets and want to spend less. See Sienci Labs AltMill MK2 4x4
Where it wins
- Full 4 by 8 foot sheet capacity without tiling
- HGR15 industrial rails throughout
- Rack and pinion on Y, ball screws on X and Z
- ATC spindle option available
- Integrated legs are included
Where it falls short
- Large floor footprint; approximately 181 kg before add-ons
- Spindle sold separately
- Significant assembly project
- Needs proper dust extraction and a dedicated space
Specifications
1265 × 2640 mm
33396 cm²
2200W
80 mm mount; optional 1.5 kW or 2.2 kW spindle, including a 2.2 kW ATC option
SLB-EXT running grblHAL with closed-loop steppers
181.4 kg
$10,390
premium
Full specification table
Relative to database
Benchmark Scores
Overall Score
Composite across 5 dimensions
Community Sentiment
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