Check the listing for details. Belt Grinder Drive Wheel for 2x72" knife making grinder (choose your bore size). Condition: New. Listed at 44.95 USD. THE RIPPER! WHY PAY $100 FOR AN ALUMINUM 6" WHEEL IF YOU COULD HAVE THE RIPPER AT HALF THE PRICE? IT'S MUCH TOUGHER & LIGHTER THAN ALUMINUM WHEELS WHICH MEANS IT SPOOLS UP FASTER BETWEEN PLUNGE CUTS. GREAT VALUE FOR MONEY! 6" Diameter precision glass filled nylon drive wheel with aluminum core. This drive wheel is 6" in diameter to provide high surface feet per minute belt speed. We designed it to be lightweight for extra zip in your grinder, especially useful for grinders with slightly underpowered motors. Made with the exact same injection molding technology & material as used on modern automotive engine serpentine belt idler wheels for extreme durability & longevity under very harsh conditions. The face of the drive wheel is 2-1/4" wide & crowned to aid with accurate belt tracking, slightly dimpled to add extra grip. The set screw(included) is 1/4-20 . For DIY style grinders like GIB, EERF, NO WELD etc. Also work well on any professionally manufactured 2x72" belt grinder, upgrade your grinder now! We use these wheels on the top quality grinders & flat plattens that we manufacture & our design has been thoroughly tested to withstand even the harshest knifemaking environments! Please also have a look at our other listings & search OriginBladeMaker on Youtube for some other fun stuff.