Deep Hole Drilling Technology: Gun Drills and BTA Drilling Solutions

June 10, 2026

The Challenge of Deep Hole Drilling

Deep hole drilling with depth-to-diameter ratios exceeding 10:1 demands specialized tooling. Gun drills and BTA systems are the two primary technologies. Gun drills excel at 1-40mm diameters with ratios up to 250:1. BTA systems handle 20-200mm diameters with superior material removal rates and hole quality.

Gun Drills

Single-flute, self-piloting tools with internal coolant delivery. Used in automotive crankshafts, hydraulic manifolds, mold cooling channels, and aerospace components.

BTA Drilling

Multi-edge cutting heads with internal chip evacuation for large-diameter deep holes. Achieves IT7-IT9 tolerance, ideal for oil and gas, power generation, and heavy equipment.

Comparison

Parameter	Gun Drilling	BTA Drilling
Diameter	1-40mm	20-200+mm
Max D:L Ratio	250:1	100:1
MRR	Moderate	High

Conclusion

Gun drills deliver precision for small-diameter extreme-depth applications. BTA provides unmatched productivity for large-diameter deep holes.

Ansprechpartner :	Selly
Telefon :	86-13566629430

In Kontakt kommen

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