05/26/2026
It's here!
The new, next generation LongMill MK3 represents the best entry-level, hobby CNC in terms of performance, design and customer support in the industry. It’s the fastest, most rigid CNC machine in its size and price category - for under $2,000 USD - and comes pre-assembled so you can be up and running in no time.
Pre-order now open. Shipping starts mid-September 2026. Limited quantities for initial roll out. See product page form details. Link in bio.
Available in 30x30 and 48x30, and easy-set up Beginner Kits.
- LongMill MK3 30x30: https://bit.ly/4v7crvV
- LongMIll MK3 48x30: https://bit.ly/42TMUKM
- LongMill Beginner's Kit: https://bit.ly/4dtc2xY
- LongMill MK3 Dust Shoe: https://bit.ly/4wPRW8H
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What's New vs Older Models:
- Linear guide rails (HR15) instead of v-wheels (thanks to economies of scale)
- Closed-loop stepper motors instead of open loop (more speed and power)
- ACME lead screw system instead of ball screw system (keeps costs low)
Redesigned SLB-LITE, 32-bit CNC controller (to accommodate gSender and grblHAL updates)
- Redesigned, z-axis detach dust shoe accessory (backwards compatible
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Highlights Include:
- Cuts materials ranging from softwoods to hardwoods, plastics to foams, and acrylics to even aluminum
- Advanced, production-style features including y-axis auto-squaring and limit switches by default
- Lead-screw and linear guide rail motion system with anti-backlash nuts for precision
- Table mounted, flexible for any setup
- T12 Lead screws linear motion system on all X, Y, Z axes
- 15mm profiled linear guide rails and bearing blocks on all axes
- High-torque NEMA 23 closed-Loop stepper motors; 1.2 Nm on all axes
- SLB-LITE controller with grblHAL firmware
- Z-axis maximum travel: 5.1”
- Z-axis clearance: 4.6″
- 30×30: 32″ cutting width on the x-axis / 32″ cutting length on the y-axis
- 48×30: 49″ cutting width on the x-axis / 32″ cutting length on the y-axis
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Shipping Update - May 26, 2026
- The LongMill MK3 will start shipping in waves. The first 300 machines are expected to start shipping mid-September 2026, in the sequence in which they are ordered. This first wave of shipments is expected to take a minimum of 4-6 weeks to clear out the queue.
- The next round of machines will be on back order, and most likely start shipping mid-to-late-October 2026, based on the order in which they are received.
- Check your Order Status to see when your MK3 is expected to ship: https://sienci.com/order-status/
- We will provide general updates via our socials and emails as we approach our expected ship date of mid-September, should any issues arise.
- All customers will be able to purchase an MK3 (machine is not affected by Canada’s Ontario ESA Compliance).
