Sienci LongMill MK3 30x30

Last updated: November 2, 2026

Sienci LongMill MK3 30x30
3.4/5#5 of 10 in large CNC routers
3.4

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
Check price at Sienci Labs$1,400

Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • 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
Cons
  • 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.

ModelWork areaRatingPrice
Sienci LongMill MK3 30x30 (this one)32 x 32 x 5.1 in3.4/5$1,400
Sienci LongMill MK3 48x3049 x 32 x 5.1 in3.5/5$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 numberLM30x30MK3
Work area
Travel (X x Y x Z)32 x 32 x 5.1 in
Area1,024 sq in
Spindle
Spindle65 mm router or 80 mm spindle mount (router not included)
Motion and control
Linear railsYes
DriveLead screw
Closed-loop steppersYes
Limit switchesYes
ControllerSLB-LITE with grblHAL
Build
Weight72 lb
Warranty1 year
Released2026-09

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