Beware of imitators who are turning wheels out of nylon & in some cases even cheap cast resin, those wheels DO NO last, especially the crowns on the tracking & drive wheels are soon worn to a taper by the tough backing found on 2"x72" knifemaking grinding belts! Our wheels are INJECTION MOLDED & we use GLASS FILLED NYLON (think fiberglass), a seriously tough material. Buy with confidence, we've sold thousands of these wheels over the years, they easily outlast even aluminum wheels This listing: A set of: Two, 2" diameter precision glass filled nylon idler wheels with sealed bearings, 2-1/4" WIDE (CHEAP WHEELS ARE 2" WIDE). One, 3" diameter precision glass filled nylon tracking wheel with sealed bearings. The tracking wheel is 2-1/4" wide, 3" in diameter & CROWNED (no sharp v) to ensure accurate belt tracking. One, 5" diameter precision glass filled nylon drive wheel with aluminum core. The drive wheel is 5" in diameter for high surface feet per minute belt speed & crowned to ensure accurate belt tracking, slightly dimpled to add extra grip . The face of the drive wheel is 2-1/4". The set screw(included) is 1/4-20 . Please note that the bore of this drive wheel is 5/8", see our other listings if you require a drive wheel with 3/4" or 7/8" bore. For DIY style grinders like GIB, EERF, NO WELD etc. Also work well on any professionally manufactured 2x72" belt grinder. 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 wheels are 2-1/4" face width to comfortably accept any commercial 2" wide grinding belt. Bore of the bearings is 1/2" so you can use any 1/2" diameter bolt as an axle. The bearings are easily replaceable when worn. We use these wheels on the top quality grinders & flat platens that we manufacture & our design has been thoroughly tested to withstand even the harshest knifemaking environments!
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