Drill bit screw tip

Details Drill bit screw tip Drill bit screw tip

2007-02-13

2009-06-09

Howell, Daniel W (Department: 3726)

Cutting by use of rotating axially moving tool

Tool or tool with support

Having central lead-screw

C408S201000

Reexamination Certificate

active

07544026

ABSTRACT:
A drill bit comprises a shank having a longitudinal axis. A cutting head is formed at one end of the shank. A removable and replaceable pilot tip such as a screw tip or pilot point is formed on the cutting head. The pilot tip is designed for controlled failure. A tool is also provided for removing the broken tip. A kit comprising a dill bit adapted to receive a removable tip, a removable tip for attachment to the cutting head, and/or a removal tool for removing a broken tip from the drill bit. A method for removing a tip from a drill bit and replacing it with another tip is also provided.

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