Learn how to build a Fidget Spinner in Fusion 360 to teach your youth about tolerance!
We first started making fidget spinners in Autodesk’s Fusion 360 to introduce Fusion’s basic sketch tools and the concept of tolerance. It’s a great simple project that is fun for youth to make. We’ve documented the process both in video form as well as step by step instructions below!
- Autodesk Fusion 360
- Access to a 3D Printer
- 4 22mm bearings
Build Directions: How to Make a Fidget Spinner in Fusion 360
You can click the images to open a larger version in a new browser tab.
Step 1: Add Rectangle
Click on the SKETCH menu dropdown and then -> Rectangle -> 2-Point Rectangle. You can also use the keyboard hotkey ‘R’
Step 1.1: Choose the plane that’s oriented toward the front.
Step 2: Size the square for the bearings.
Make the rectangle at least 2mm larger than the diameter of the bearing you’ll use. I found that the ideal measurement of the rectangle should be 24 x 25 mm.
Place the rectangle on the center point. Drag your mouse to expand the rectangle until the X and Y dimensions appear. Press tab to select between the boxes, enter your dimension then press tab and enter the other dimension.
Step 3: Center a 22mm circle.
Select the Circle tool by pressing ‘C’. Place the circle’s center point on the center of the rectangle’s top line. A symbol will appear when the circle is aligned to its center. The circle should have a diameter of 24mm. Repeat the same step for the bottom line of the rectangle.
Step 3.1: Repeat for the bottom line of the rectangle.
Step 4: Add room for bearings.
Make another circle inside the circles we just created to make ports for the bearings. Since I’m using 22mm bearings, I’m going to make the circle 22.11 mm in diameter. I do this to take account for the tolerance of our 3d printers, they wouldn’t fit is the circle was exactly 22mm.
Step 5: Add height.
Let’s add height to this sketch. Press ‘E’ on your keyboard to use the Extrude tool. Select all parts of the sketch except for the inner circle. The bearing is 7mm tall so extrude the sketch by 7mm.
Step 5.1: Make it 7mm tall.
The bearing is 7mm tall so extrude the sketch by 7mm.
Step 6: Select Pattern.
Now, we’ll use the Circular Pattern tool. Go to Create -> Pattern -> Circular Pattern. Make sure the pattern type is set to ‘Bodies’.
Click Select next to Objects and click your object. Your object will turn blue. Now choose the axis to create the pattern.
Click either one of the circular edges and the pattern will appear.
Step 7: Increase the increments of the pattern.
You can use the blue scroll to increase the increments of the pattern.
Step 7.1: Combine the object.
Once you’re done, combine the object by clicking Modify and then Combine. Select all the objects to combine the fidget. Make sure the operation is set to join then click enter.
Step 8: Export the STL
To prepare your fidget spinner design for 3D printing, export as an STL by right-clicking on the project tab and selecting Save As STL.