Factory direct sale counterbore for CNC machine drilling holes
Counterboring head is generally used as semi-fine or final processing of deep hole parts. It is manily for expanding hole diameter and improve hole precision. It has a good guiding accuracy, the axial resisting force is small, so the cutting condition is better than drilling process. The head body can be used for a long term, so it is in a low cost only the inserts being consumed; and the insert changing is very easy and convenient. This drill head can process the materials of carbon steel, high strength alloy steel and stainless steel, etc.