BTA Drilling Explained: Process, Tools, and Applications
I use BTA drilling for holes over about 20mm that need fast cycle times. When I need to remove a lot of material quickly and the diameter is large enough to support the tool, BTA drilling is my go-to process. It is also called single tube system drilling because the coolant flows around a single drill tube rather than through a double-tube arrangement like ejector drilling. BTA drilling — named after the Boring and Trepanning Association — is a deep hole drilling process for larger diameters. It’s the method I use when the hole is over about 20mm diameter and needs to be cost-effective. The process was developed in Germany in the 1930s and has been refined continuously since then. Modern BTA drilling machines can produce holes up to 300mm diameter and 20 meters deep. ...