Parametric ESK8 Pulley/Sprocket with Stainless Steel Pins for Kegel/ABEC Hubs- Press /Push Fit

thingiverse

I've used bolt-on style printed pullies and sprockets for years now, but lately I've been experimenting with different custom drive systems and branched out into the word of press/push fit hub adapters. As you all know, 3D printed parts are fragile along the z-axis, fracturing easily along the layer lines. I found a cheap solution to this problem by incorporating these [5mm x 40mm Stainless Steel Shelf Pins](https://www.amazon.com/gp/product/B07FP11B9D/ref=ox_sc_act_title_1?smid=A26RP5I2GB8EDJ&th=1) to take the sheer loads off of the 3D printed parts. I've included links to the Fusion360 files so you can experiment yourself- best part is they are fully parametric and there are both HTD-5M pullies and #25 chain sprockets with ABEC and Kegel hub adapters. The pins are smaller than the holes/slots in the hubs, so to get a snug fit I've undersized the pin circle diameter so the pins essentially squeeze the center of the hub for a friction fit. When sized properly, there is zero slop/play. Let me know what you think!