This listing: 1. 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", 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.
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