BTA Drilling Process
BTA drilling is a deep hole drilling method which was created by the Boring and Trepanning Association in the 1940’s. It comprises of a special hollow tooling that allows pressurized coolant to flow into the hole on the outside of the drill, and evacuates chips through an internal hole in the drill.
Depending on the depth and diameter of the hole needing to be drilled, the BTA tooling will consist of a hollow drill tube that it attached to a threaded indexable cutter head. BTA drilling has an effective diameter range of 20-200mm (0.80″-8.00″) and can reach depths of up to 400mm (16.00″).

Capable Material
Gun drilling can be used on both ferrous and non-ferrous material. These include:
- Steel
- Wood
- Wrought Iron
- Cast Iron
- Lead
- Copper
- Aluminum
- Plastics
- Zinc
- Silver
- Gold
- Aluminum

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Information
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