Carbide 3D Shapeoko 5.1 Pro 4x4
#6 in LargeFull review
For a small shop that wants rails and ballscrews on a 4x4 bed with US support. Add the cost of a router before comparing it with machines that include one.
Carbide 3D $3,800$3,800
3.2/5
A ball screw 4 by 4 for a garage shop that wants full sheet capacity without moving up to a 4 by 8 machine. Add the cost of a router before comparing prices.
- 51.2 x 51.2 x 4.6 inWork area
- Ball screwDrive
- YesLinear rails
Check price at Amazon$4,499Check price at SainSmart$3,599
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- A 51 in square bed takes full 4 by 4 ft sheets for signs, cabinet parts and panels
- Linear guides, 20 mm ball screws and closed loop motors keep large jobs accurate
- Inductive and mechanical limit switches guard against crashes
- Optional second Z axis can run two tools
Cons
- The router is not included, so budget for one on top of the price
- At 331 lb it needs a dedicated table and floor space of about 6 by 6 ft
- Only a one year warranty for a machine at this price
How it scores
The rating comes from 5 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | GM-4X4-U2 |
|---|---|
| Work area | |
| Travel (X x Y x Z) | 51.2 x 51.2 x 4.6 in |
| Area | 2,621 sq in |
| Spindle | |
| Spindle | 65 mm router mount (router not included) |
| Motion and control | |
| Frame | aluminum extrusion with hybrid spoilboard |
| Linear rails | Yes |
| Drive | Ball screw |
| Closed-loop steppers | Yes |
| Limit switches | Yes |
| Controller | GRBL 1.1h, 32-bit board |
| Offline controller | Yes |
| Build | |
| Weight | 330.7 lb |
| Warranty | 1 year |
| Released | 2024-11 |
Alternatives in this size
FoxAlien XE-Ultra 8080
#7 in LargeFull review
A large, rigid benchtop router for woodworkers who want a near 3 by 3 ft bed with ball screws. Add a router or spindle and a spoilboard to the price.
Amazon $1,799$1,799
LUNYEE 8080 Pro Max
#9 in LargeFull review
A low price way into a 31.5 in square bed for sign makers working mostly in wood, MDF and acrylic. Buyers who need proven rigidity for aluminum should pick a machine with published rails and screws.
Amazon $899$899
Compare
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