3018 REX CNC Router Machine, Pre-Assembled for Beginner & STEM
⚠️ WARNING ⚠️
Choking Hazard – Small Parts for most items on this site.
Not for children under 3 years old.
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-Min Fast Setup & Modular Design:
Traditional 3018 CNC kits take over 2 hours to build. The 3018 REX features a pre-assembled modular design, letting beginners complete setup in under 10 minutes to start creating faster
Never Outgrow This Machine:
Add a laser module or a 4th-axis rotary attachment anytime—the ports are already built in, so you’re not stuck buying a new machine as your skills grow. Built-in Wi-Fi also lets you send jobs wirelessly, no cable required.
Nearly 2X Faster: Finish Projects Sooner:
Quiet, independent drivers mean less noise while you work. Cutting speeds run up to 3000mm/min—nearly double the 1500-2000mm/min of standard competitors—so your projects finish sooner.
Clean, Accurate Cuts Every Time:
A rock-solid dual-rail frame, optical-axis Y and Z, and linear bearings keep the bit steady for cuts accurate to ±0.1mm—no wobble, no wasted material. A taller 91mm Z-clearance also means thicker stock fits without extra risers.
Enhanced Safety & Easy GRBL Control:
Equipped with physical X/Y/Z limit switches and an instant Emergency Stop button for max safety. Fully compatible with mainstream GRBL 1.1h software, ensuring an easy learning curve

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.

RS3D Return Policy
At RS3D, we take great pride in the quality of our products and packaging. As a small, family-owned business, we ensure each order is crafted with care and arrives in excellent condition.
Please review our return policy below:
All Sales Are Final
We do not accept returns or exchanges for non-damaged items.
Damaged or Incorrect Items
If your order arrives damaged, defective, or incorrect, we’re happy to offer a replacement, refund, or store credit.
To qualify:
- You must contact us within 7 days of delivery
- Include clear photos of the item(s) and packaging
- Provide a brief description of the issue
Exceptions / Non-Returnable Items
We do not accept returns on the following:
- Perishable goods (e.g., food, flowers, plants)
- Custom or personalized items
- Personal care products (e.g., beauty items)
- Hazardous materials, flammable liquids, or gases
We also cannot accept returns on sale items or gift cards.
If you're unsure whether your item qualifies, feel free to reach out.
Exchanges
Exchanges may be available on a case-by-case basis. Please contact us to discuss.
Refunds
Once we receive and inspect your return:
- We’ll notify you of approval status
- Approved refunds are issued to your original payment method within 10 business days
Please allow additional time for your bank or credit card company to process the refund.
If more than 15 business days have passed since your return was approved, contact us at store@rs3d.us.
How to Report an Issue
Please email store@rs3d.us with the following information:
For damaged or incorrect items:
- Your order number
- Photos of the damaged or incorrect item(s) and packaging
- A brief description of the issue
- Your preferred resolution:
For missing items:
- Your order number
- Name of the missing item
- A brief description of the issue
- Your preferred resolution
Return Shipping Costs
- If the issue was caused by shipping damage or production defects, RS3D will cover return shipping.
- If the issue was caused by customer use, the customer is responsible for return shipping.
RS3D Shipping Policy
At RS3D, we strive to ship your order as quickly as possible. Please note the following:
- Production Time: Some items are made to order and require additional time to be 3D printed.
- Stock Levels: Not all items may be in stock at the time of purchase. Orders may include both in-stock and made-to-order items.
- Estimated Delivery Time: Orders typically ship within 2 to 10 business days, depending on availability and production time.
If you have any questions regarding your order or our policies, please contact us at store@rs3d.us.
We are committed to providing excellent customer service and stand behind the quality of every 3D-printed item we ship.
Thank you for supporting our small business!
Discover more in our FAQ
1. Do you offer free shipping?
We offer free shipping on certain promotions. Standard shipping costs will be calculated at checkout unless otherwise stated.
2. How long will it take to get my order?
Most orders ship within 2–10 business days, depending on stock and production time. Some items are made to order and may require extra time to 3D print.
3. Do you ship internationally?
Currently, we primarily ship within our designated service areas. If you are outside our region, please contact us at store@rs3d.us to confirm availability.
4. Can I return or exchange an item?
All sales are final for non-damaged items.
We accept returns only for damaged, defective, or incorrect items reported within 7 days of delivery.
5. What should I do if my order is damaged or incorrect?
Email store@rs3d.us with:
- Your order number
- Photos of the item and packaging
- A short description of the issue
replacement, refund, or store credit.
6. Are any items non-returnable?
Yes. We cannot accept returns for:
- Perishable goods
- Custom/personalized items
- Personal care products
- Hazardous materials or flammable liquids/gases
- Sale items or gift cards
7. How do refunds work?
Once your return is approved, refunds are issued to your original payment method within 10 business days.
Please allow extra time for your bank or card company to process it.
8. Do your products contain small parts?
Yes. Many RS3D products include small parts that may pose a choking hazard. Not for children under 3 years old. Always use products as intended and under supervision.
9. What materials do you use for 3D printing?
We use a variety of filaments, including PLA, ABS, PETG, TPU/TPE, Nylon, and specialty blends like carbon fiber–filled, wood-filled, and metal-filled PLA. If you need specific materials, contact us before ordering.
10. How is my personal data protected?
We use HTTPS encryption, secure payment gateways, and industry-standard security measures to protect your data.
We never sell your information and only share it with trusted service providers when necessary.
11. How can I contact RS3D?
You can reach us at:
📧 store@rs3d.us
🌐 www.rs3d.us