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The commonly used diamond grain size is in the range of 30/35 to 60/80. The harder the rock, the finer grain size should be selected. Because under the same pressure conditions, the finer the diamond, the sharper it is, which is conducive to cutting into hard rocks. In addition, generally large-diameter saw blades require high sawing efficiency, and a coarser grain size should be selected, such as 30/40, 40/50; small-diameter saw blades have low cutting efficiency and require a smooth section of rock sawing. Choose a finer particle size, such as 50/60, 60/80.
The so-called diamond concentration refers to the density of diamonds distributed in the matrix of the working layer (that is, the weight of diamonds per unit area). "Specifications" stipulate that the concentration of 4.4 carats of diamond per cubic centimeter of the working matrix is 100%, and the concentration of diamonds of 3.3 carats is 75%. The volume concentration indicates the volume of diamond in the agglomerate, and stipulates that when the volume of diamond occupies 1/4 of the total volume, the concentration is 100%. Increasing the diamond concentration is expected to extend the life of the saw blade, because increasing the concentration reduces the average cutting force experienced by each diamond. But increasing the concentration will inevitably increase the cost of the saw blade, so there is an economical concentration, and the concentration becomes larger as the sawing rate becomes larger.
Hardness of cutter head
Generally speaking, the higher the hardness of the bond, the stronger its wear resistance. Therefore, when sawing abrasive rocks, the bond hardness should be high; when sawing soft rocks, the bond hardness should be low; when sawing abrasive and hard rocks, the bond hardness should be moderate .
In the process of cutting the stone, the diamond circular saw blade will be subjected to alternating loads such as centrifugal force, sawing force, and sawing heat.
Due to the force effect and temperature effect, the diamond circular saw blade is worn and damaged.
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