Short-hole drill and a drill body therefor

Details Short-hole drill and a drill body therefor Short-hole drill and a drill body therefor

2011-03-01

2011-03-01

Gates, Eric A (Department: 3726)

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Frictionally engaging sides of opening in work

C408S229000, C408S705000, C408S713000

Reexamination Certificate

active

07896588

ABSTRACT:
A short-hole drill, including a drill body being rotatable about a center axis and having a rotationally symmetrical envelope surface, one or more replaceable cutting inserts mounted in pockets in a front end of the drill body, one or more outwardly open flutes being countersunk in the envelope surface and extending rearwardly from the front end of the drill body to evacuate chips from the cutting inserts, and a number of replaceable first support pads being mounted in countersunk seats proximate the front end of the drill body to support and guide the drill against a hole wall generated by the cutting inserts. A number of second support pads are mounted in countersunk seats that are axially spaced apart from the first support pads by an envelope surface portion having a predetermined axial extension to support and guide the drill when the first support pads leave the hole wall.

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patent: WO 2005/095034 (2005-10-01), None

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