Center-free drill

Cutting by use of rotating axially moving tool – Tool or tool with support – Having axial – core-receiving central portion

Patent

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Details

408204, 408223, 408703, B23B 5104

Patent

active

045964998

ABSTRACT:
An annular hole cutter having a shank and an integral cylindrical body provided with a plurality of axially extended cutting teeth which each has an inner cutting edge and an outer cutting edge. The inner and outer cutting edges are equal in radial width and their inner ends meet in a common leading cutter point. The outer and inner cutting edges on each cutting teeth share a substantially mutual radial face.

REFERENCES:
patent: 4422812 (1983-12-01), Linville

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