Drill bit with improved stability

Details Drill bit with improved stability Drill bit with improved stability

1993-08-24

1995-02-07

Bishop, Steven C.

Cutting by use of rotating axially moving tool

Tool or tool with support

Including detailed shank

408230, 433165, B23B 5102, A61C 302

Patent

active

053870590

ABSTRACT:
A modified flute drill which prevents non-circular oval shaped drill holes which occur from incidental lateral or non-axial forces imparted by the operator is provided. The design modification is based on relieving, beveling, or dulling of the leading or side-cutting edge of the flutes of the drill bit for most of the length of the drill bit except for an initial specified length of the flutes where the leading edge of the flutes retains its sharpness and side-cutting capacity. The flute modification additionally imparts to the fluted drill a capacity of self-directional stability after the drill begins its penetration into the material being drilled, at the chosen initial angle of orientation of the drill bit, due to the absence of a side-cutting edge on the following major portion of the drill flutes.

REFERENCES:
patent: 2897695 (1959-08-01), Winslow
patent: 4345899 (1982-08-01), Vlock
patent: 4968193 (1990-11-01), Chaconas et al.
Advertisement For Brasseler Drill, Dental Products Report, May, 1994.

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