For a hobby or small business shop that wants closed loop ball screw motion and a long warranty on a 49 x 33 in bed. Add a spindle to the price.
Onefinity $2,295
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.
- 49 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 | 32 x 32 x 5.1 in | 3.4/5 | $1,400 |
| Sienci LongMill MK3 48x30 (this one) | 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
| Work area | |
|---|---|
| Travel (X x Y x Z) | 49 x 32 x 5.1 in |
| Area | 1,568 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 | 80 lb |
| Warranty | 1 year |
| Released | 2026-09 |
Alternatives in this size
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 $2,195For 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.
Sienci Labs $1,400Compare
Compare the Sienci LongMill MK3 48x30 with any other CNC router →
More from Sienci Labs: every Sienci Labs product ranked.