3" x 21" Sanding Belts
3" x 21" Aluminum Oxide Sanding Belts USA1 Abrasives 3" x 21" Sanding Belts are one of the most common portable belt sander sizes, used widely in woodworking shops, job sites, and metalworking environments. Semi-open coat aluminum oxide on X-weight cloth backing delivers fast, consistent stock removal with excellent clog resistance. Sold in packs of 10 belts. Technical Specifications Abrasive Material: Aluminum oxide Coat Type: Semi-open coat Backing: X-weight cloth Bond Type: Resin-over-resin Belt Size: 3" x 21" Direction: Bidirectional Package Size: 10 belts per pack Available Grits: 36, 40, 50, 60, 80, 100, 120, 150, 180 Key Features & Benefits Semi-Open Coat: Resists loading for longer belt life X-Weight Cloth Backing: Handles belt tension and heat without stretching or tearing Bidirectional: Runs in either direction for easy installation Wide Grit Range: 36–180 grit covers aggressive removal through fine finishing Versatile: Works on wood, metal, plastic, an