1, the selection of abrasive
The most commonly used abrasive is corundum (A) and white fused alumina (WA), followed by the black silicon carbide (C) and green silicon carbide (GC), the remaining common chromium corundum (PA), a single crystal corundum (SA) , microcrystalline corundum (MA), zirconium corundum (ZA).
Corundum grinding wheel: corundum hardness, toughness, suitable for grinding high tensile strength of the metal, such as carbon steel, alloy steel, malleable iron, hard bronze, this abrasive grinding performance, wide adaptability, commonly used in the removal of a larger margin of kibble, cheap, cutting wheel and can be widely used.
White corundum grinding wheel: white corundum hardness slightly higher than corundum, toughness than brown fused alumina, grinding, abrasive shatter easily, grinding heat, suitable for the manufacture of fine grinding of hardened steel, high carbon steel, high-speed steel and grinding of thin-walled parts with the grinding wheel, the cost is higher than brown fused alumina.
Black silicon carbide grinding wheel: black silicon carbide is brittle and sharp and hardness than white fused alumina, suitable for grinding lower mechanical strength of the material, such as cast iron, brass, aluminum and refractory.
Green silicon carbide grinding wheel: green silicon carbide hardness brittle than black silicon carbide abrasive sharp, good thermal conductivity, suitable for grinding carbide, optical glass, ceramic and other hard and brittle materials.

2. Choice of granularity
The grinding wheel is coarse-grained, high production efficiency, but coarser grind the workpiece surface; using fine-grained grinding wheel, grind the workpiece surface roughness, and lower productivity. The premise meet roughness requirements, you should try to use coarse-grained grinding wheel in order to ensure high efficiency of grinding. General coarse grinding wheel, coarse-grained selection selection of fine-grained grinding wheel fine grinding.cutting disc