Skip to product information
Sample Print-A-Kit | High Speed and Torque Gear Ratios
*100% satisfaction guaranteed*
This kit includes four gearboxes, each with more compound gears than the last. Give them a spin to see how adding stages boosts torque and slows speed. Try it in reverse to increase speed and reduce torque. Just keep in mind that friction builds up with each stage too. It’s a fun way to explore how gear trains trade power, speed, and efficiency.
Peek Inside Some of Our Curated Build Experiences:
Floating Arm Trebuchet
One of the most efficient trebuchet designs in the world. Fully 3D printable and ready to explore.
Everything you need to build and explore this fascinating projectile-launching machine is included. Discover the mechanics behind one of history’s most powerful siege engines while assembling it yourself. Perfect for learning, experimenting, and having fun with physics and engineering. All parts pack neatly into the compact and portable Print-A-Kit box, ready for your next launch anywhere.
Insanely High Gear Ratios
How many gears can you spin? And how fast can you get it to spin?!
Experience the challenge of extreme mechanical advantage with this high gear ratio gearbox. With each turn, the final gear moves slowly as energy transfers through multiple stages. It's incredibly hard to spin fast by hand, which makes it even more satisfying to try. Test your strength, feel the torque, and explore real-world mechanics in action.
Single-Pallet Escapement
Who doesn’t enjoy the satisfying click of a classic mechanical clock?
3D print this unique escapement mechanism and experience how mechanical clocks really work. Watch as the pendulum swings, the gears turn, and the escape wheel ticks forward one tooth at a time. This hands-on project lets you explore the inner workings of timekeeping with real moving parts. It even includes a fully 3D printable spring, so the entire mechanism runs without any extra hardware.
How It Works
1
Download
Explore our cool new kits every month. Select the ones that pique your interest the most.
2
3D Print
Every kit includes pre-sliced STL files to simplify the 3D printing process.
3
Build, Learn and Have Fun
Build your 3D printed creation with our detailed digital build guides and educational resources and videos!
Frequently Asked Questions
Return policy
Our mission is to have all customers fully satisfied with their purchase. If that's not the case, notify us, and we will make every effort to address any concerns.
How do I access my downloads?
To access your kits, click on your account icon and go to the downloads section. Every month, you can select from our curated collection of kits. Remember, any old kits from the previous month will be stored away in the vault
How many kits are there?
We are consistently expanding our range of kits across various categories. Currently, we offer approximately 15 kits and plan to introduce 3-5 new kits each month. Stay updated on our monthly releases!
Print-A-Kit Subscription
Science and engineering made fun for everyone. Don't let your 3D printer collect dust, subscribe and 3D print fun and engaging projects.
Print-a-Kit | Engineering made fun for everyone