Gun Drilling vs. BTA Drilling: Choosing the Right Technology
The Evolution of Deep Hole Drilling Technology
Origin and Development of Gun Drilling
Gun drilling technology dates back to the 17th century when gunsmiths needed to drill long, straight, high-precision bores for firearm barrels, ensuring shooting accuracy. This led to the development of specialized gun drilling techniques.
High straightness and precision, using internal coolant to reduce bore deviation.
Suitable for small-diameter deep hole machining, ranging from 2mm to 30mm.
As industrial demands grew, gun drilling efficiency became limited for large-diameter and deep-ratio bores. By the mid-20th century, BTA drilling technology emerged to meet the needs of defense, energy equipment, and heavy machinery manufacturing.
Ideal for large-diameter and high-performance deep hole machining (diameters above 30mm).
Internal chip removal design ensures a more stable machining process.
Used in hydraulic cylinders, aerospace components, defense equipment, and energy industries.
Comparison Between Gun Drilling and BTA Drilling
Technology
Hole Diameter Range
Main Applications
Advantages
Gun Drilling
2mm – 30mm
Precision machining, mold cooling channels, medical instruments, automotive components
High precision, excellent straightness
BTA Drilling
30mm and above
Heavy machinery, aerospace components, defense equipment, energy pipelines
High efficiency, large hole diameters, internal chip removal
