Sienci LongMill MK3 48x30

Last updated: November 2, 2026

Sienci LongMill MK3 48x30
3.5/5#4 of 10 in large CNC routers
3.5

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
Check price at Sienci Labs$1,800

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 30x3032 x 32 x 5.1 in3.4/5$1,400
Sienci LongMill MK3 48x30 (this one)49 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

Work area
Travel (X x Y x Z)49 x 32 x 5.1 in
Area1,568 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
Weight80 lb
Warranty1 year
Released2026-09

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