Title:
ドリル
Document Type and Number:
Japanese Patent JP3602577
Kind Code:
B2
Abstract:
The present invention relates to a drill (10), preferably for metal cutting, including a substantially solid shank (12) having a first tip end (14), including at least one cutting edge, a second opposite end (16) and an intermediate portion (20) located between the first tip end (14) and the second opposite end (16), a number of flutes (22) corresponding to the number of cutting edges, said flutes (22) extending helically from the tip end (14) to the intermediate portion (20) of the shank (12). The cross-sectional area of the flutes (22) increases gradually from the tip end (14) to the intermediate portion (20) and the helix angle ( alpha ) decreases gradually from the tip end (14) to the intermediate portion (20).
Inventors:
Robert Stedt
Ronnie Carlson
Ronnie Carlson
Application Number:
JP22017694A
Publication Date:
December 15, 2004
Filing Date:
September 14, 1994
Export Citation:
Assignee:
Seco Tools Actie Borrag
International Classes:
B23B51/00; B23B51/02; (IPC1-7): B23B51/00
Domestic Patent References:
| JP61144905U |
Attorney, Agent or Firm:
Takashi Ishida
Toshio Toda
Masaya Nishiyama
Toshio Toda
Masaya Nishiyama