JPS5676313A - Twist drill - Google Patents

Twist drill

Info

Publication number
JPS5676313A
JPS5676313A JP14923979A JP14923979A JPS5676313A JP S5676313 A JPS5676313 A JP S5676313A JP 14923979 A JP14923979 A JP 14923979A JP 14923979 A JP14923979 A JP 14923979A JP S5676313 A JPS5676313 A JP S5676313A
Authority
JP
Japan
Prior art keywords
drill
twist drill
thickness
chisel edge
center thickness
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
JP14923979A
Other languages
Japanese (ja)
Other versions
JPS626929B2 (en
Inventor
Takayuki Nishimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
G N TOOL KK
Original Assignee
G N TOOL KK
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 G N TOOL KK filed Critical G N TOOL KK
Priority to JP14923979A priority Critical patent/JPS5676313A/en
Publication of JPS5676313A publication Critical patent/JPS5676313A/en
Publication of JPS626929B2 publication Critical patent/JPS626929B2/ja
Granted legal-status Critical Current

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  • Drilling Tools (AREA)

Abstract

PURPOSE: To provide the twist drill with an excellent cutting capacity by a method wherein the twist drill of a cemented carbide is provided with rigidity by thickening the center thickness thereof while strength and sharpness thereof are guaranteed at the same time by reducing a thickness of the chisel edge thereof.
CONSTITUTION: A pair of parallel cutting edges 5, 5 are formed at tip ends of cutters of the twist drill. Rands 6, 6 having widthes of 3mm or less and inclined angles of about 1°W5° are provided in contacting with the cutting edges 5, 5 thereby forming the chisel edge 7. The rigidity of the drill is increased by thickening the center thickness thereof while strength and sharpness of the drill are guaranteed by reducing the thickness of the chisel edge. The above-described center thickness may be thickened by forming surfaces 10, 10 in contacting with rands 6, 6 and making the third hand angle thereof into 5°W30°.
COPYRIGHT: (C)1981,JPO&Japio
JP14923979A 1979-11-17 1979-11-17 Twist drill Granted JPS5676313A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14923979A JPS5676313A (en) 1979-11-17 1979-11-17 Twist drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14923979A JPS5676313A (en) 1979-11-17 1979-11-17 Twist drill

Publications (2)

Publication Number Publication Date
JPS5676313A true JPS5676313A (en) 1981-06-23
JPS626929B2 JPS626929B2 (en) 1987-02-14

Family

ID=15470917

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14923979A Granted JPS5676313A (en) 1979-11-17 1979-11-17 Twist drill

Country Status (1)

Country Link
JP (1) JPS5676313A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5688083A (en) * 1993-05-20 1997-11-18 Iscar Ltd. Drilling tool and an indexing cutting insert for use therein
JP2010173007A (en) * 2009-01-29 2010-08-12 Kyocera Corp Drill and cutting method using the same
US20130136552A1 (en) * 2011-11-30 2013-05-30 Kyocera Corporation Drill and method of manufacturing machined product
CN104936730A (en) * 2013-01-23 2015-09-23 钴碳化钨硬质合金公司 Drill bit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6441097A (en) * 1987-08-06 1989-02-13 Fuji Electric Co Ltd Vending machine for card goods
JP4834183B1 (en) * 2011-03-03 2011-12-14 株式会社ビック・ツール Drill

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS541101U (en) * 1977-06-06 1979-01-06
JPS5414089A (en) * 1977-07-05 1979-02-01 Caterpillar Mitsubishi Ltd Drill with chip breaker for high hardness

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS541101U (en) * 1977-06-06 1979-01-06
JPS5414089A (en) * 1977-07-05 1979-02-01 Caterpillar Mitsubishi Ltd Drill with chip breaker for high hardness

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5688083A (en) * 1993-05-20 1997-11-18 Iscar Ltd. Drilling tool and an indexing cutting insert for use therein
JP2010173007A (en) * 2009-01-29 2010-08-12 Kyocera Corp Drill and cutting method using the same
US20120087753A1 (en) * 2009-01-29 2012-04-12 Kyocera Corporation Drill and cutting method using same
US20130136552A1 (en) * 2011-11-30 2013-05-30 Kyocera Corporation Drill and method of manufacturing machined product
US9623488B2 (en) * 2011-11-30 2017-04-18 Kyocera Corporation Drill and method of manufacturing machined product
CN104936730A (en) * 2013-01-23 2015-09-23 钴碳化钨硬质合金公司 Drill bit
US9662719B2 (en) 2013-01-23 2017-05-30 Kennametal, Inc. Drill bit

Also Published As

Publication number Publication date
JPS626929B2 (en) 1987-02-14

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