BTA deep hole drill is a typical structure of internal chip removal deep hole drill. It is improved on the basis of single edge internal chip removal deep hole drill. Its cutting edge is double-sided staggered, and the chips are cut from both sides. down, and enter the drill pipe discharge hole through the double-sided chip removal hole. BTA deep hole drilling has uniform cutting force distribution, good chip separation and chip breaking performance, stable and reliable drilling, and good straightness of the deep hole drilled. BTA generally processes deep holes over D25mm,but we also have brazed drill head for small size .