Multi-stage forming tungsten steel drill bit

For tungsten carbide drills, the outer diameter, the edge angle and the length of the blade can be determined by themselves. The diameter of the shank is determined according to the characteristics of the machine. Turn left and turn right, and change the spiral angle and the edge of the knife according to the material to be processed. Order workpieces can also be used to achieve one-time machining with a custom drill to avoid time loss.