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What is the role of the drill in drilling

While rotating the drill bit with the impact, crushing and shearing the role of broken rock formation. Therefore, the drill can adapt to the soft, medium and hard of various strata, so that drilling speed is greatly improved.

When digging work, drill about a vertical axis of rotation, while axial movement. Soil is at the cutting torque and axial forces of the drill bit role in the destruction of the extrusion and the centrifugal force of the blades work loose and pound shredded, pressed against the sides of the pit formed Chieftains, while the page along elevator to the surface. Soil stream when no motion to block the pit wall at the time, due to the centrifugal force pulverizer was thrown around the pit, complete the digging process.