Spark is harmful in the cutting process with an cut-off disc. The ceramic alumina grain can reduce the park for the ceramic alumina grain is made from lots of nanometer size particles. The omitted particle is too small to be seen as obvious sparks.
Ceramic alumina grain is a superb abrasive raw material with extremely high self-sharpening. After it is launched by 3M in 1981, the ceramic abrasive grain is famous for the long lifetime with vitrified abrasive wheels. It gets another name SG abrasive grain since it’s produced by a Sol-gel method instead of traditional fusing method of alumina.
There are two distinguished advantages of ceramic alumina grain. On one hand, the toughness of ceramic alumina material is very high even though it remains good hardness and grinding ability. It eliminates the frangibility of fused alumina. On the other hand, ceramic alumina abrasive grain gets much higher self-sharpening. As a result, there will be new cutting edges after a single cutting operation. And the grains are off with tiny nanosized particles. The cutting disc turns to be very sharp with few sparks visually. Moreover, the cutting section is bright and won’t get dark.
