This is an omni wheel for a robot or whatever.It uses 608 bearing in the rollers, so youll need 6 for each wheel. Also an 8mm axle, either a threaded or smooth.I plan to print this out and thread the holes in the rollers, then use a threaded axle and a little glue to keep it in place.Print 2 hubs and 12 roller halves. Insert bearings and secure in place(glue or something) Attach both halves of the hub together, using the holes for alignment(and/or bolts). Only 2 should line up, not diagonal of each other, they will be on the same side of the axle.Attach a roller half to axle and insert thru bearing, then attach the other half. Repeat 5 more times.Do cool stuff with it!