JPS595215U - Drill - Google Patents
DrillInfo
- Publication number
- JPS595215U JPS595215U JP10078482U JP10078482U JPS595215U JP S595215 U JPS595215 U JP S595215U JP 10078482 U JP10078482 U JP 10078482U JP 10078482 U JP10078482 U JP 10078482U JP S595215 U JPS595215 U JP S595215U
- Authority
- JP
- Japan
- Prior art keywords
- cutting edge
- corner cutting
- outer diameter
- land
- helical groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/44—Margins, i.e. the narrow portion of the land which is not cut away to provide clearance on the circumferential surface
- B23B2251/443—Double margin drills
Landscapes
- Drilling Tools (AREA)
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
第1図はドリル先端部の正面図、第2図は同じく要部拡
大図、第3図は同じ(先端の側面図、第4図は本考案の
別の実施例を示す先端部の展開側面図である。
1・・・ねじれ溝、2a、2b・・・外周部、3・・・
マージン、A□〜An・・・ランド部、B□〜Bn・・
・コーナ切れ刃。Figure 1 is a front view of the tip of the drill, Figure 2 is an enlarged view of the main parts, Figure 3 is the same (side view of the tip, and Figure 4 is an expanded side view of the tip showing another embodiment of the present invention). It is a figure. 1... Twisted groove, 2a, 2b... Outer peripheral part, 3...
Margin, A□~An...Land part, B□~Bn...
- Corner cutting edge.
Claims (1)
って分離され、かつ、上記ねじれ溝に沿う少なくとも2
個以上のランド部を形成し、これら各ランド部のうち回
転方向の最前端のコーナ切れ刃外径を最小とし、該最前
端のコーナ切れ刃に続く各ランド部のコーナ切れ刃外径
を順次大となるよう各ランド部の略全長に亘って形成し
たことを特徴とするドリル。On each outer circumferential surface divided by the helical groove, at least two portions are separated by a margin and run along the helical groove.
The outer diameter of the corner cutting edge of the most forward end in the rotational direction of each of these land parts is set to the minimum, and the outer diameter of the corner cutting edge of each land part following the frontmost corner cutting edge is sequentially adjusted. A drill characterized in that each land portion is formed over substantially the entire length so as to be large.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10078482U JPS595215U (en) | 1982-07-02 | 1982-07-02 | Drill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10078482U JPS595215U (en) | 1982-07-02 | 1982-07-02 | Drill |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS595215U true JPS595215U (en) | 1984-01-13 |
JPH0222173Y2 JPH0222173Y2 (en) | 1990-06-14 |
Family
ID=30238270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10078482U Granted JPS595215U (en) | 1982-07-02 | 1982-07-02 | Drill |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS595215U (en) |
-
1982
- 1982-07-02 JP JP10078482U patent/JPS595215U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPH0222173Y2 (en) | 1990-06-14 |
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