Radio Flyer Wheel with Bearing

cults3d

Remixed an excellent design and added a bearing race to improve load bearing and lower rolling resistance. The only bearings i could find that fit the application somewhat close were these i found on amazon.https://smile.amazon.com/dp/B08F5HVFQG/ref=cm_sw_r_tw_dp_F55NSVC772ZE6Z8DMD0D?_encoding=UTF8&psc=1 12mm x 28mm x 8mm bearings. The axle shaft is slightly smaller than 12mm but its not a machined surface so there isn't a bearing that fits exact AFAIK. The fitment will still be tighter than worn plastic wheels. I print my wheels in PETG with enough walls to make the spokes solid. I am using .28 layer height and a 0.6 line width. These wheels are printing in about 2 1/2 hours for each piece. I'm using a bolt to line up the wheels and epoxy to secure them together, tighten a washer and nut down on the bolt to hold them together for drying. Good luck, Enjoy. Note, I have printed two sets but haven't assembled them yet. If there are any changes needed i'll post it. The bearings are a perfect press fit with my fingers. If you use PLA it will likely make the hole too small so you would need to sand a little.