Gun drilling is a specialized machining process designed to create deep, precise, and straight holes in a workpiece. Originally developed for manufacturing firearm barrels, gun drilling is now widely used in industries requiring long, narrow, and highly accurate holes. It is especially popular in the aerospace, automotive, medical, mold-making, and oil and gas sectors.

This drill has a unique, single-fluted design and a coolant hole running through its length. As the drill advances into the material, coolant is pumped through the hole to lubricate the cutting surface, cool the tool, and flush away chips. Key characteristics of gun drilling include:

• High Depth-to-Diameter Ratios: Gun drilling can achieve hole depths far greater than the diameter, often up to 300:1.
• Precise Hole Alignment: Maintains a straight, accurate bore over extended distances.
• Smooth Surface Finish: Achieves fine, smooth finishes, often eliminating the need for further finishing processes.