Skate Bearing Insert for 4mm Shaft

simple expanding insert to fit a 4mm shaft into a skate bearing

included the solidworks file for anyone to modify as necessary for different shafts and bearings

you may need to tweak the scaling on the part, it should fit fairly tight, and forcing the shaft into the center will cause it to expand and lock into the center of the bearing

bearing internal d =~7.85mm
external =~22mm

shaft 4mm

scale the Z distance for longer shafts, wider or multiple bearings on a single shaft