Is it possible to drill a flat bottomed hole without buying a special bit?

In article ,
"Kelly Jones" wrote:

Is it possible to drill a flat bottomed hole without buying a special bit?



A special grind on a regular bit?

--
Free men own guns, slaves don't
www.geocities.com/CapitolHill/5357/

On Mon, 09 May 2005 18:25:39 -0400, Nick Hull
wrote:

In article ,
"Kelly Jones" wrote:

Is it possible to drill a flat bottomed hole without buying a special bit?



A special grind on a regular bit?

Done that. It worked fine in brass.

Pete Keillor

"Nick Hull" wrote in message
...
| In article ,
| "Kelly Jones" wrote:
|
| Is it possible to drill a flat bottomed hole without buying a special
bit?
|
|
|
| A special grind on a regular bit?

In the aviation business we called them gunbarrels, but there are
special drill bits whose purpose is to use the old hole as a guide to the
new one, and there was little to no point on them.
Sometimes we had to make our own gunbarrels, but it helped if they were
done with bits that didn't have flute reliefs cut out, as they tended to cut
into the metal you want to match drill.

"Nick Hull" wrote in message
...
In article ,
"Kelly Jones" wrote:

Is it possible to drill a flat bottomed hole without buying a special
bit?



A special grind on a regular bit?

--
Free men own guns, slaves don't
www.geocities.com/CapitolHill/5357/

Quick and dirty... (if it is a nice, standard size...)

Get a cheap end mill. Take a stone or small file and knock the edge
of the sides of the flutes so it will only cut on the end...

Jerry

On Mon, 09 May 2005 18:25:39 -0400, Nick Hull
wrote:
In article ,
"Kelly Jones" wrote:
Is it possible to drill a flat bottomed hole without buying a special bit?
A special grind on a regular bit?
-----------------
You can use an endmill. One of the few times an end mill will
work in a Jacobs type chuck.

GmcD