PFERD 69016 Plastic Bench Wheel Bushing, 1/4" thick for reducing 1-1/4" arbor to 5/8
Weiler 07725 Drive Arbor Hole, 1/4" Diameter Arbor Hole to 1/4" Stem
Weiler 07722 Drive Arbor Hole, 3/8" Diameter Arbor Hole to 1/4" Stem