For a hobby or small business shop that wants closed loop ball screw motion and a long warranty on a 33 x 33 in bed. Add a spindle to the price.
Onefinity $2,195
For a hobbyist who wants a rigid rail machine with a 32 by 32 inch bed for well under $2,000, and already has or will buy a trim router.
- 32 x 32 x 5.1 inWork area
- Lead screwDrive
- YesLinear rails
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
- Linear rails, lead screws and closed-loop motors on every axis hold accuracy in hardwood and aluminum
- Arrives pre-assembled and runs within a couple of hours
- Free gSender software and a large user community for help
- Router not included; the Beginner’s Kit with one and starter bits costs $215 more
- Needs a computer beside the machine to run jobs
- One-year warranty
The Sienci LongMill MK3 family
Every Sienci LongMill MK3 model we rank, smallest first. Ratings compare each against its own size.
| Model | Work area | Rating | Price |
|---|---|---|---|
| Sienci LongMill MK3 30x30 (this one) | 32 x 32 x 5.1 in | 3.4/5 | $1,400 |
| Sienci LongMill MK3 48x30 | 49 x 32 x 5.1 in | 3.5/5 | $1,800 |
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 | LM30x30MK3 |
|---|---|
| Work area | |
| Travel (X x Y x Z) | 32 x 32 x 5.1 in |
| Area | 1,024 sq in |
| Spindle | |
| Spindle | 65 mm router or 80 mm spindle mount (router not included) |
| Motion and control | |
| Linear rails | Yes |
| Drive | Lead screw |
| Closed-loop steppers | Yes |
| Limit switches | Yes |
| Controller | SLB-LITE with grblHAL |
| Build | |
| Weight | 72 lb |
| Warranty | 1 year |
| Released | 2026-09 |
Alternatives in this size
For a hobbyist who wants a rigid rail machine with a 49 by 32 inch bed for well under $2,000, and already has or will buy a trim router.
Sienci Labs $1,800For 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 $3,800Compare
Compare the Sienci LongMill MK3 30x30 with any other CNC router →
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