drill bit for metal drill digging operations

When the drill digging operations, the core drilling bit bit rotation around the vertical axis, while for axial movement. The soil is cutting torque and axial force at the bit role, was destroyed in the extrusion and centrifugal force to work loose leaf and  Diamond Core Drill Machine chopped, pressed to form a soil pit wall flow, while the elevator to the surface along the page. When the earth moves to free Pit stop the flow at the time, due to the centrifugal force pulverizer was thrown around the pit, complete the digging process.