1/2" ID x 1 1/8" OD Flanged Bearing (FR8ZZ)(10-pack)

If you have access to a lathe, turning down the ends of 1/2" hex shaft as well as VEXpro Thunderhex is a great way of retaining shafts without the need for collar clamps, bolts or retaining rings.

Price is for a tube/pack of 10 bearings.