flat drill

flat drill

[′flat ‚dril]
(design engineering)
A type of rotary drill constructed from a flat piece of material.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Finally, I have a flat drill press vise, although that's not what I use it for.
1 Pipework will be next to a wall, so use a flat drill bit the size of the pipe (22mm) and cut the hole.
Without the sides to guide the flat drill, it would run all over the place.
The first improvement in gundrill design came in the form of a flat drill that was equipped with a collar behind the cutting edges.
Mark the depth of the lock on the flat drill bit with sticky tape and drill overlapping holes down the centre line.
Flat drills: Flat bars may be ground with a conventional drill point at the end.