rinding wheel abrasive hardness

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 commonly is black and green silicon carbide wheel. The green silicon abrasive paper sheet  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  Sanding Sheets 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  metal cutting wheel 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 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.