Drill head for deep hole drilling tool for the BTA deep hole drilling, and deep hole drilling tool

摘要

Drill head of the deep hole drilling tool for [challenge] BTA deep hole drilling, and I provide a deep hole drilling tool. Or [SOLUTION] BTA / STS drilling head of the ejector deep hole drilling tool and a (100), (100), and is rotatable about axis of rotation (113) perforated side the drill head (160 drill head body having a (107) hollow duct having the (160) perforated side chip collecting opening (106)) and (101), the main cutting edge slopes being positioned in the (160) the perforated side (114) cutting with the cutting edge slopes secondary and (115) and A (109), the secondary cutting edge is disposed radially outwardly of the cutting edge, the secondary cutting edge slopes major cutting edge and the slope (114) ( lakes forming cutting corners (120) is disposed adjacent the chip collecting opening (106) cutting across (108) and (109), guide pads 115) is a (110, 111) , and a (110, 111) guide pads arranged in the half of the periphery of the opposite side (108) rake drill head body (101) (111) guides a first pad, guide pads of the second ( drill head disposed diametrically opposite the cutting edge of the corner (120) 110) (100). The alignment guide is the first pad (111), size guide pad angle measured in the circumferential direction of the drill head (100) and (112) only so as to be offset with respect to (120) cutting edge corner . In accordance with the present invention, is smaller than 70 ° (112) guide pad angle. [Selection] Figure Figure 1