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Patent Searching and Data


Title:
ROUTER BIT FOR PROCESSING LOCK ATTACHING HOLE AND PROCESSING THEREOF
Document Type and Number:
Japanese Patent JPH09155811
Kind Code:
A
Abstract:

To perform repaid processing and to miniaturize an apparatus by coaxially forming a second cutting blade small in diameter to the lower part of a first cutting blade large in diameter in a stepped state and coaxially providing a rod-shaped shank part to the upper part of the first cutting blade.

A router bit 1 is moved by predetermined quantity in the longitudinal direction of an end surface 9a while rotated by a router head 8. A deep elongated case fitting hole 11 in which the case part of a lock is fitted is formed by the first cutting blade 5 of the router bit 1. Subsequently, the router bit 1 is moved upwardly and the second cutting blade 6 thereof is positioned at the inlet part of the case fitting hole 11 and, in this state, the second cutting blade 6 is moved along the peripheral edge of the inlet part. By this constitution, the shallow rectangular seat hole 12 in which the front plate of a lock is fitted is formed to the peripheral edge part of the inlet of the case fitting hole 11 by the second cutting blade 6 of the router bit 1.


Inventors:
HOCCHI KOICHI
Application Number:
JP34531795A
Publication Date:
June 17, 1997
Filing Date:
December 06, 1995
Export Citation:
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Assignee:
YASAKA TEKKO KK
International Classes:
B27C5/10; B27G13/08; (IPC1-7): B27G13/08; B27C5/10
Attorney, Agent or Firm:
増田 恒則 (外1名)