Bonded Abrasives

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Bonded Abrasives Abrasives are generally categorized into cutting, grinding, sanding and finishing. Bonded Abrasives are the primary products used in cutting and grinding applications. Bonded abrasives were born from the need to cut or grind down hard materials and are known for their aggressive stock removal and fast cuts. What makes up a bonded abrasive? Bonded abrasives are made up of 5 Primary ingredients: Grain. The abrasive grains do all the cutting and grinding action. Wheels can be made using aluminum oxide, zirconia, ceramic and silicon carbide grains. Aluminum oxide (AO) is the most commonly found grain used in bonded abrasives, they offer long life and consistent results. Zirconia grains are more friable than AO, providing a more aggressive cut. Ceramic grains, the least commonly used, provide the longest life AND fast cuts; check out our 4X wheels to test out the ceramic grain. Resin. Thermosetting phenolic resins liquify under the high pressure and heat of the cooking /curing process. Once cool the resin sets up hard as a rock, giving the bonded abrasive its hardness. Fiberglass. The literal safety net of the abrasive disc, fiberglass provides additional safety from side load pressure during usage. Our abrasives discs come with 2 to 3 layers of internal fiberglass. Metal Center. The metal center helps to guide the wheel onto the machine arbor as well as protects the arbor from undercutting that can be caused by exposed grain. Label. Benchmark Abrasives exclusively uses bake on labels on our wheels. The labels are baked right into the wheel formula during the pressing stage of manufacturing. When the wheel comes out of the oven the label is on there permanently…who likes labels flying off their discs (not us!)? Abrasive Grinding Theory aka “How these rocks work?” Abrasive grains are held together using thermosetting phenolic resins. The abrasive grain is shaped into a round disc shape and affixed to a tool that can spin at high RPMs (revolutions per minu