JPS5917112U

JPS5917112U - Drill

Info

Publication number: JPS5917112U
Application number: JP11363082U
Authority: JP
Inventors: 尾ノ井　壽
Original assignee: Individual
Current assignee: Individual
Priority date: 1982-07-26
Filing date: 1982-07-26
Publication date: 1984-02-02

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本ドリルの実施例を示す正面図、第２図は側面
図、第３図は裏面図、第４図は第１図の平面図、第５図
は第２図Ｉ−Ｉ線断面図、第６図は第１図■−■線断面
図である。１・・・ドリル本体、２・・・みぞ、３・・・超硬鋼、
４・・・すくい面、５・・・しゃくり、６・・・逃げ面
、０・・・回転中心、ａ、　　ｂ、　　ｃ、　　ｄ・・
・刃線上の符号。Figure 1 is a front view showing an embodiment of this drill, Figure 2 is a side view, Figure 3 is a back view, Figure 4 is a plan view of Figure 1, and Figure 5 is taken along line I-I in Figure 2. The cross-sectional view, FIG. 6, is a cross-sectional view taken along the line ■--■ in FIG. 1... Drill body, 2... Groove, 3... Carbide steel,
4... Rake face, 5... Hakuri, 6... Flank surface, 0... Center of rotation, a, b, c, d...
・Sign on the blade line.

Claims

[Scope of utility model registration request]

It is a twisting drill with two grooves and a carbide blade at the tip, and the cutting edge is formed perpendicular to the rotation axis, and the diameter is 1/3 to 17 mm near the outer periphery from the rotation center to the outer periphery.
A cutting edge with a width of 6 is formed, and the inner edge up to the center of rotation is missing, and the other cutting edge is slightly retreated in the axial direction from the cutting edge to form a cutting edge entirely from the center of rotation to the outer periphery, A drill characterized in that approximately half of the outer circumference of the drill has a cutting edge that is further set back.