Using this metalworking process, we drill centric and eccentric holes up to a drilling depth of 11 m with maximum precision on special deep drilling machines.
Special drilling operations such as step drilling, contour drilling, skiving, reaming and roller burnishing are possible as finishing processes over the entire drilling depth. CNC-controlled “bottle boring” is also possible along the entire drilling depth.
Advantages
Special deep-hole drilling process
- Peeling
- Contour drilling
- Roller burnishing
- Bottle boring (max. 8m deep from one side)
- Eccentric drilling
Materials
- Ferritic & austenitic steels
- Duplex & superduplex steels
- Nickel & titanium alloys
- Bronze & copper alloys
BTA deep hole drilling – the process
BTA drilling is a machining process for producing deep holes with high quality and a large length-to-diameter ratio.
The drill heads are mounted on long drill pipes. In order to be able to process even demanding materials such as high-alloy steels, the drill heads are fitted with replaceable carbide inserts and guide pads. Due to the smoothing effect of the guide pads, a high surface quality can be achieved even with full drilling, depending on the feed rate and material. A cooling lubricant is supplied under pressure from the outside into the space between the bore wall and the drill tube. The cooling lubricant not only cools and lubricates during machining, but also ensures that the chips are removed via the chip mouth (opening in the drill head) through the inside of the drill tube.
Worth knowing: Deep drilling lexicon, BTA – Drilling methods
