Abstract: A method of fabricating a micro drill, which includes a drill part for machining a hole and a shank part fixed to a motor, the drill part and the shank part being made of different materials. The method includes the steps of forming a drill part-forming powder compact having a recess in one end thereof, and forming a shank part-forming powder compact having a protrusion, the protrusion intended to be fitted into the recess of the drill part-forming powder compact, forming an assembly of the drill part-forming powder compact and the shank part-forming powder compact, with the protrusion fitted into the recess, and simultaneously sintering the assembly of the drill part-forming powder compact and the shank part-forming powder compact.
Type:
Grant
Filed:
June 23, 2009
Date of Patent:
September 16, 2014
Assignee:
Bestner Inc.
Inventors:
Tae Sik Yoon, Soon Jin Cho, Seung Hyun Cho, Jae Joon Lee