A standard gun drill has a unique head shape, a single effective cutting edge, and a groove along the tool’s length. During the drilling process, the gun drill employs coolant introduced through a hole in the tool and expels chips through the groove. Guide pads on the tool head burnish the hole, resulting in a highly precise, round hole with a specific diameter.

This distinctive internal coolant/external exhaust feature sets gun drilling apart from other methods of deep-hole drilling. It is a highly effective technology suitable for both drilling deep holes with a length and diameter ratio exceeding 10 and achieving precision in shallow hole drilling. The gun drill is assembled by welding the drill shank, drill stem, and drill tip together, with a through-hole for the entry of cutting liquid into the cutting area.