Method and apparatus for making screws having a drill...

Details Method and apparatus for making screws having a drill... Method and apparatus for making screws having a drill...

B - Operations, Transporting

21

K

10/3

B21K 1/56 (2006.01) F16B 25/00 (2006.01)

Patent

CA 1272006

ABSTRACT OF THE DISCLOSURE Method and apparatus for making screw having a drill section and a reamer section, the drill section and the reamer section being shaped at one step of process, wherein the upper portions of the reamer edges are crushed so as to be aligned with an equal thickness and length, thereby imparting equal fra- gility to the reamer edges.

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