Sdc grinding wheel and the difference between where the CBN wheel? SDC is a metal-coated diamond abrasive wheel to do; CBN is to CBN (cubic boron nitride) as abrasive grinding wheel, are generally used are diamond grinding wheel. SDC grinding wheel is a diamond grinding wheel, and CBN grinding wheel hardness. General abrasive wheel commonly used: A-corundum WA-white corundum C-black carbonized silicon GC green silicon carbide AC mixed abrasive SA-single crystal corundum MA-microcrystalline corundum BA-black corundum ZA-zirconia corundum PA-chrome corundum FA-semi-brittle corundum SG-ceramic Corundum SC-cubic silicon carbide BC-boron carbide D-diamond