People all generally agree that improving the productivity of tungsten carbide circular blades for metal cutting and solving problems requires the use of more advanced material. Improve metal cutting carbide circular blade material technology has brilliant value. However, relying solely on new cutting materials to solve problems will inevitably lead to results oppositely, and may even go to a dead end. For example, if the cause of blade breakage is excessive mechanical load. The solution is to choose a stronger cutting tool material. But if stronger materials cannot be found, there is no way to go.

In process of solving the problem actively, the role of metal cutting carbide circular blade groove has not been paid attention to. Changing metal cutting carbide circular blades groove will change the flow of deformed material in a positive way. Use different grooves of metal cutting carbide circular blade to change chip flow direction, amount and influence of chemical, thermal and friction loads can also be positively changed.

Other factors related to the way of tungsten carbide circular blade for metal cutting enters the workpiece. It depends on the cutting edge angle, rake angle, and knife angle. If the rake angle is perpendicular to the processed surface, the rake angle is on a negative number. Cutting force will transmit to the main parts of the strongest part of the blades. On the other hand, when the cutting edge is tilted backward from the workpiece surface, the rake angle is regarded as a positive number. The cutting force is concentrated on the cutting edge, but it is not as strong as the main part. In addition, the flank of a blade inserted with a positive rake angle must have a wedge angle or a back angle, which further reduces the tool strength.