As depth increases, so does temperature. Lubrication is essential to reduce friction between guide pads and the workpiece.
High-pressure coolant is critical. In Gundrilling , coolant travels through the tool, forcing chips out along an external V-shaped flute. In BTA (Boring and Trepanning Association) drilling , used for larger diameters, coolant is fed outside the drill tube and flushes chips out through the center of the drill, preventing damage to the bore surface. The Drill
Deep hole drilling processes often involve asymmetrical tool design, where the tool rotates while the workpiece remains stationary, or both rotate in opposite directions. As depth increases, so does temperature
Ideal for small-diameter deep holes, typically producing highly precise, straight holes. In Gundrilling , coolant travels through the tool,
As depth increases, torsional vibration becomes a critical concern for safety. Core Technologies and Methods