Bench Grinder Adapter 16mm x 22mm (16mm to 22mm) for grinding wheel 5/8" x 22mm | eBay
Bench Grinder Adapter 1/2" x 16mm (12,7mm to 16mm) for grinding wheel | eBay
EMILYPRO Shaft Arbor Extension 1/2" and 5/8"/ Motor Arbor Threaded Shaft Adapter for Buffing Grinding Wheels / Fit for Bench Grinder - Right 1 Pack - - Amazon.com