Holder to make a hobbed bold

You need 2 angles and 2 ball bearings, I took them from fidget spinner. For putting them I have made them a little warm and then pressed with the help of a vise. The photo on the wooden strip shows my prototype, the ball bearings are still on the wrong side. I have already changed the STL file. I have made these angles to make a bolt for my extruder drive.

The video can be found here: https://www.youtube.com/watch?v=6FMHMYGoD0Y
My extruder drive is from here. https://www.thingiverse.com/thin