Title:
TIP BIT OF AUGER SCREW
Document Type and Number:
Japanese Patent JP2002013376
Kind Code:
A
Abstract:
To reduce cost required for exchange and simplify exchange work by partially exchanging only a tip side of each cutting-in claw with conical bit of a tip bit or only each conical bit at a tip of the cutting-in claw with conical bit of the tip bit.
In the tip bit 11 of an auger screw in which a plurality of cutting-in claws 12 with conical bit are formed, only the tip side 12b of the cutting-in claw 12 with conical bit of the tip bit 11 or only each conical bit 13 at the tip of the cutting-in claw 12 with conical bit can be partially and freely exchanged.
Inventors:
OTA HIROKAZU
OTA YOSHIHIRO
OTA KENGO
OTA YOSHIHIRO
OTA KENGO
Application Number:
JP2000197664A
Publication Date:
January 18, 2002
Filing Date:
June 30, 2000
Export Citation:
Assignee:
SEIBU KOKEN KK
International Classes:
E21B10/44; (IPC1-7): E21B10/44
Attorney, Agent or Firm:
Tadashi Harasaki