BTA drilling stands for Boring and Trepanning Association. In this deep drilling process, the cooling lubricant is supplied from the outside and the chips are discharged from the inside. The coolant of the drilling machine is supplied to the deep drilling tool (core drilling tool) by means of a drilling oil supply apparatus and a special seal.
BTA deep hole drilling is a single tube system, as it uses a single drill pipe for deep drilling. This makes it particularly suitable for the production of large batches (series production) for deep drilling in contract manufacturing. The drill core is drilled out of the hole during BTA drilling.