3018 REX CNC Router Machine, Pre-Assembled for Beginner & STEM

In 2011, SainSmart started the way most makers do — with an open-source board, a soldering iron, and the belief that precision tools shouldn't come with an industrial price tag. Years of Arduino-compatible boards, 3D printers, and late-night maker projects later, our community kept asking for one more thing: a way to cut and carve, not just print and solder.

That's how Genmitsu was born — and in 2018, the very first 3018 CNC router shipped. It wasn't perfect. Ours never are on the first try. But it was the start of a specific, eight-year education: thousands of beginners telling us exactly what almost stopped them from finishing their first project.

The 3018-REX carries both timelines forward — fifteen years of building for makers, and eight years spent learning what a first CNC cut actually needs to go right.

10-Minute Quick Assembly

Pre-assembled frame and wiring mean beginners are cutting their first project the same day it arrives — not the same weekend.

Engineered to Grow With You 

Dual linear shafts, Nema 17 motors, and a 300 x 180 x 60mm work area with taller Z clearance than standard 3018-class machines — plus native support for a Y-axis linear rail upgrade and 4-axis mounting, so REX is still your machine two years from now.

Whisper-Quiet 32-Bit Board

Independent silent drivers keep noise low and speed high (up to 3000mm/min) — built for shared spaces, not just garages.

Enhanced Safety & Easy GRBL Control

Physical limit switches and an instant E-Stop, fully compatible with GRBL 1.1h and the software you already use.

All-in-One Expansion & Smart Connectivity

Full wireless app control (jog, spindle RPM, E-Stop), native 4-axis mounting, a 3-pin laser port, and a ready accessory ecosystem — dust collection, laser module, rotary axis, and a drawing attachment — turning one CNC router into a full creative platform.

Fifteen Years of Makers, Eight Years of CNC — Not Just Machines

We didn't design the 3018-REX in a vacuum. It's built on eight years of CNC-specific feedback, layered on top of fifteen years of being a maker brand first — from the same community that's been sharing their boards, prints, and first cuts with us since our earliest open-source days. That's a Facebook group thousands of makers strong, and a maker showcase we run every year.