JPS5633215A - Twist drill - Google Patents

Twist drill

Info

Publication number
JPS5633215A
JPS5633215A JP10745479A JP10745479A JPS5633215A JP S5633215 A JPS5633215 A JP S5633215A JP 10745479 A JP10745479 A JP 10745479A JP 10745479 A JP10745479 A JP 10745479A JP S5633215 A JPS5633215 A JP S5633215A
Authority
JP
Japan
Prior art keywords
twisted grooves
chips
twisted
grooves
drill
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.)
Pending
Application number
JP10745479A
Other languages
Japanese (ja)
Inventor
Yoshitomo Mizuki
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.)
Daijietsuto Kogyo Kk
Dijet Industrial Co Ltd
Original Assignee
Daijietsuto Kogyo Kk
Dijet Industrial Co Ltd
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 Daijietsuto Kogyo Kk, Dijet Industrial Co Ltd filed Critical Daijietsuto Kogyo Kk
Priority to JP10745479A priority Critical patent/JPS5633215A/en
Publication of JPS5633215A publication Critical patent/JPS5633215A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To remove chips smoothly as well as to prevent the vibration when a work is cut by a method wherein the torsional rigidity of a drill is increased.
CONSTITUTION: A drill with twisted grooves is formed so that the walls 4 of the twisted grooves 2 which are located on the forward side in a rotating direction are expanded from the front cutting edges toward the ends of the twisted grooves 2 and the sectional area of the twisted grooves is decreased gradually from near the front cutting edges toward the ends of the twisted grooves. Since the twisted grooves are formed in the said way, the chips which appear in cutting are lifted along the twisted grooves. Though the chips are thick, excessively curled, broken in pieces, they are removed without difficulty.
COPYRIGHT: (C)1981,JPO&Japio
JP10745479A 1979-08-22 1979-08-22 Twist drill Pending JPS5633215A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10745479A JPS5633215A (en) 1979-08-22 1979-08-22 Twist drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10745479A JPS5633215A (en) 1979-08-22 1979-08-22 Twist drill

Publications (1)

Publication Number Publication Date
JPS5633215A true JPS5633215A (en) 1981-04-03

Family

ID=14459567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10745479A Pending JPS5633215A (en) 1979-08-22 1979-08-22 Twist drill

Country Status (1)

Country Link
JP (1) JPS5633215A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6025608A (en) * 1983-07-19 1985-02-08 Masao Kubota Twist drill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6025608A (en) * 1983-07-19 1985-02-08 Masao Kubota Twist drill
JPS625727B2 (en) * 1983-07-19 1987-02-06 Masao Kubota

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