JPS595215U - Drill - Google Patents

Drill

Info

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
Application number
JP10078482U
Other languages
Japanese (ja)
Other versions
JPH0222173Y2 (en
Inventor
新開　寛
Original Assignee
有限会社新開工具製作所
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 有限会社新開工具製作所 filed Critical 有限会社新開工具製作所
Priority to JP10078482U priority Critical patent/JPS595215U/en
Publication of JPS595215U publication Critical patent/JPS595215U/en
Application granted granted Critical
Publication of JPH0222173Y2 publication Critical patent/JPH0222173Y2/ja
Granted legal-status Critical Current

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

【図面の簡単な説明】[Brief explanation of the drawing]

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)

【実用新案登録請求の範囲】[Scope of utility model registration request] ねじれ溝によって分割された各外周面に、マージンによ
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.
JP10078482U 1982-07-02 1982-07-02 Drill Granted JPS595215U (en)

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)

Also Published As

Publication number Publication date
JPH0222173Y2 (en) 1990-06-14

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