Here is the fidget spinner we will be making in OnShape today.

Supplies

For this project all you need is a CAD software. I will be using Onshape

Step 1: Creating the Bearing

First Start a new sketch plane on the TOP. Use the center point circle and starting from origin create 2 circles. 1 that is 8mm and another that is 22mm. Exit out of the sketch and use the extrude tool and extrude the sketch to 7mm symmetric to the TOP plane.

Step 2: Spinner

First hide the bearing part on the same parts studio. Use a construction center point circle to create a 50mm circle. Then create a 20mm and 30mm circle at the top of the construction circle using center point circle. Next, use circular pattern and duplicate the 2 circles 3x. Use the coincident tool to lock in the circles. Next, use 3-point arc to create the 12mm radius arc and use the tangent tool against the circles. Use circular pattern to duplicate the arc. Extrude the spinner body 7mm symmetric to the TOP plane. Lastly, use the fillet tool to create a 1mm fillet across the entire drawing except the center circle.

Step 3: Hub

First make the bearing visible and use a section view of the front plane. Use the use tool and use the inner edge of the bearing. Now you can close out of the bearing view. next draw a rough sketch half the hub. Use the dimension tool alongside the Construction line to give dimensions to the hub. Use the revolve tool to revolve around the Construction line and use fillet and chaffer to add the chaffer to the bottom and fillet to the top.

Step 4: Assembly

Bring all the parts into a parts studio. Fix the bearing and then use a revolve mate to connect the bearing and the spinner. Next use the fastened mate to connect to the Hub to the bearing on both sides. You can use the animate button to make the spinner rotate.