Mainly used for grinding high-speed steel tools alumina

 Mainly used for grinding high-speed steel tools alumina sand and white colors, mainly with silicon carbide grinding carbide blade wheel that green. Abrasive grain size, hardness, binders and organizational five factors determine the characteristics of the wheel. The following will do a brief introduction of these properties. 1) abrasive, abrasives are cutting and grinding disc  commonly used oxide, carbide, and high-hardness abrasive system three kinds. Ships and factories commonly used is aluminum oxide and silicon carbide grinding wheel grinding wheel. Alumina abrasive grinding wheel low hardness (HV2000-HV2400), toughness, apply sharpening high speed steel tool, which is called corundum white, taupe called corundum.
Grit SiC grinding wheel abrasive hardness than the high alumina (Hv2800 or more). Brittle and sharp, and has good thermal conductivity and electrical conductivity, suitable for grinding cemented carbide. Which  mini flap disc commonly is black and green silicon carbide wheel. The green silicon carbide grinding wheel is more suitable for carbide tools.
 2) Particle size: The particle size indicates the size of the degree of abrasive. Grains per inch in length through the perforations on how many numbers as that symbol. 60 refers to the abrasive particle size for example just by the length per inch of the screen with 60 holes. Therefore, the larger the number, the finer the grit said. Coarse abrasive tools should be selected numbers of small grinding wheel, grinding tools should be selected number large (ie, abrasive fine) of the wheel. Particle board used for the 46 - Taiwan 0 number of soft or medium hard wheel.
 3) Hardness: The hardness reflects the abrasive grinding wheel during the grinding force, the grinding wheel surface from the ease of shedding. Wheel hard, abrasive surface that is hard to fall; wheel soft, which means that abrasive easily. Hardness and abrasive wheel hard metal cutting wheel  and soft are two different concepts, must be clearly distinguished. Grinding HSS and carbide tools should be selected turning soft or medium soft wheel.Furthermore, the choice of grinding wheel should also be considered binding agent and tissue. Generally used in ships and factories vitrified (Code A) and medium organizations of the wheel. In summary, we should be based on the correct selection of grinding wheel cutting tool materials. Sharpening high speed steel tool should be used in a particle size of 46 to 60 soft or medium soft aluminum oxide wheels. Sharpening carbide tools should be used in a particle size of 60 to 80 soft or medium soft silicon carbide grinding wheel, the two can not be wrong.