JPS5867614U - twist drill - Google Patents

twist drill

Info

Publication number
JPS5867614U
JPS5867614U JP15968781U JP15968781U JPS5867614U JP S5867614 U JPS5867614 U JP S5867614U JP 15968781 U JP15968781 U JP 15968781U JP 15968781 U JP15968781 U JP 15968781U JP S5867614 U JPS5867614 U JP S5867614U
Authority
JP
Japan
Prior art keywords
cutting edge
drill
twist drill
thinning
length
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
JP15968781U
Other languages
Japanese (ja)
Other versions
JPS6040259Y2 (en
Inventor
宮原　實
Original Assignee
株式会社不二越
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 株式会社不二越 filed Critical 株式会社不二越
Priority to JP1981159687U priority Critical patent/JPS6040259Y2/en
Publication of JPS5867614U publication Critical patent/JPS5867614U/en
Application granted granted Critical
Publication of JPS6040259Y2 publication Critical patent/JPS6040259Y2/en
Expired legal-status Critical Current

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  • 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]

図面はこの考案のドリルの一実施例を示し、第１図は先
端切刃の正面図、第２図は先端切刃の側面図である。 ２・・・・・・第１切刃、３・・・・・・ドリル先端の
中心、４・・・・・・第２切刃、８・・・・・・第２切
刃のす（い面、９・・・・・・シンニング開分。The drawings show an embodiment of the drill of this invention, with FIG. 1 being a front view of the tip cutting blade, and FIG. 2 being a side view of the tip cutting blade. 2...First cutting edge, 3...Center of drill tip, 4...Second cutting edge, 8...Second cutting edge ( On the other hand, 9...Thinning opening.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 平行な２枚の第１切刃をもち心厚が０．２Ｄ以上である
ツイストドリルにおいて、ドリル止端の中心より各第１
切刃に向って延びる第２切刃を形成し、第１切刃の長さ
１に対して第２切刃の長さ０．８１乃至１．２１とし、
第２切刃のす（い面にドリル先端から軸方向にシンニン
グを施し、シンニング開き角を第２切刃を基準として９
０°乃至１３５°としてなるツイストドリル。In a twist drill with two parallel first cutting edges and a core thickness of 0.2D or more, each first cutting edge is cut from the center of the drill toe.
forming a second cutting edge extending toward the cutting edge, the length of the second cutting edge being 0.81 to 1.21 relative to the length of the first cutting edge;
Thinning is applied to the groove surface of the second cutting edge in the axial direction from the tip of the drill, and the opening angle of the thinning is set to 9 with respect to the second cutting edge.
Twist drill with angles from 0° to 135°.
JP1981159687U 1981-10-28 1981-10-28 twist drill Expired JPS6040259Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1981159687U JPS6040259Y2 (en) 1981-10-28 1981-10-28 twist drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1981159687U JPS6040259Y2 (en) 1981-10-28 1981-10-28 twist drill

Publications (2)

Publication Number Publication Date
JPS5867614U true JPS5867614U (en) 1983-05-09
JPS6040259Y2 JPS6040259Y2 (en) 1985-12-04

Family

ID=29952134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1981159687U Expired JPS6040259Y2 (en) 1981-10-28 1981-10-28 twist drill

Country Status (1)

Country Link
JP (1) JPS6040259Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005169572A (en) * 2003-12-11 2005-06-30 Mitsubishi Materials Corp Drill, throwaway drill and throwaway tip

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5048511A (en) * 1973-08-31 1975-04-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5048511A (en) * 1973-08-31 1975-04-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005169572A (en) * 2003-12-11 2005-06-30 Mitsubishi Materials Corp Drill, throwaway drill and throwaway tip

Also Published As

Publication number Publication date
JPS6040259Y2 (en) 1985-12-04

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