Amazon.com: Nylon-Pulley Belt Grinder 2 inch x72 inch Wheel Set 4 1/2 inch Drive 5/8 inch Bore 3 1/2 inch Track 2 1/2 inch Idler, 7.8 inch : Automotive
Belt Grinder wheel set knife grinder 4" Drive-24 mm shaft, 3" tracking, 2" Idler | eBay