Image: Sienci Labs
Sienci Labs AltMill MK2 2x4
Sienci Labs
Best for: Shops that want AltMill rigidity but do not have room for a 4x4 footprint
Typical starting price
$3,890Editorial 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 MK2 2x4 retains the platform's profile linear guides, ball screws, closed-loop steppers and grblHAL controller in a shallower footprint. The current technical resource lists 1265 x 635 x 174mm of cutting area, with the long dimension on X. Metal legs are included, so it does not need a separate workbench, but the spindle, MDF wasteboard and T-tracks are separate purchases. Compare the actual space available and complete package cost with the 4x4; the smaller machine gives up Y capacity rather than halving the gantry's X travel.
Who this fits best
Shops that want AltMill rigidity but do not have room for a 4x4 footprint
Buy this if
Shops that want AltMill rigidity but do not have room for a 4x4 footprint. Same industrial motion system as the 4x4 in a smaller footprint.
Skip this if
Spindle sold separately, and narrow 2 foot X axis limits sheet work.
What else you still need
A compatible spindle and VFD, appropriate power supply, dust collection, MDF wasteboard, T-tracks, cutters and a control computer. Metal legs are included, so a separate frame or table is not normally required.
Material reality check
Wood, plastics and non-ferrous metals with suitable tooling and cuts. The 635mm Y cutting area limits full-sheet work in one setup; the X axis is 1265mm.
Better alternative if...
you need full 4 x 4 ft capacity. See Sienci Labs AltMill MK2 4x4
Where it wins
- Same industrial motion system as the 4x4 in a smaller footprint
- Ball screws and HGR15 rails on all three axes
- Closed-loop steppers with auto-correction
- Free gSender software
- Lower entry price into the AltMill platform
Where it falls short
- Spindle sold separately
- The shorter 635mm Y travel limits the panel size handled in one setup
- Still heavy and a substantial build
- Check the current shipment estimate when ordering
- Price advantage over the 4x4 is small relative to the area you give up
Specifications
1265 × 635 mm
8033 cm²
2200W
80mm mount, spindle sold separately: 1.5kW or 2.2kW
SLB-EXT running grblHAL with closed-loop steppers
85 kg
$3,890
premium
Full specification table
Relative to database
Benchmark Scores
Overall Score
Composite across 5 dimensions
Community Sentiment
We have not summarised owner feedback for the Sienci Labs AltMill MK2 2x4 yet, so this section is intentionally left without claims. Check the sources for current owner discussions.
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