Grinding Wheel - Abrasive and size

(1) Abrasive
   The abrasive is the most important indicator wheel, grinding wheel thing is to rely on it, it does not mean there is no wheel this product. Abrasive selection requirements are more stringent, the grinding wheel and the workpiece when the friction is ultra-high temperature, high-temperature abrasive can not stand it, will soon melt away, so it is necessary to heat up; a lot of products are grinding metal and the like, and some are very hard, and abrasive hardness is not high, is the anti-grinding wheel hardness is relatively high; the time between the grinding wheel and workpiece are not instantaneous take some time, so it requires it has a strong toughness down. From the above several characteristics may probably know what will be the choice of the abrasive: diamond, corundum class, silicon nitride, etc., these are the world's most hard materials several, they have a strong wear resistance, high temperature resistance, toughness and appropriate. After different binding agents and manufacturing technology to produce a wide variety of wheel.

(2) particle size
  Abrasive particle sizes called granularity. Particle size into coarse-grained and fine-grained, grain size classification commonly used screening method, for example, the particles can pass through the sieve apertures 60 petit particles, that is fine-grained, can pass through the apertures 40 mesh, called large particles, that is, the coarse-grained. Sometimes sub-medium-grained, and some called powder. Wheel size to produce surface finish and processing efficiency of grinding workpiece significant impact, abrasive coarse grinding capacity, grinding efficiency is high, but the surface is rough, not so smooth; abrasive fine grinding is more uniform, the surface is relatively smooth processing ,, but cutting the amount is not so big, so relatively low grinding efficiency. It can be considered from the workpiece surface finish and grinding work efficiency of their choice.