[TheForge] drill bit stock

[Ralph Sproul]

Hi Roger.  Many of the drill bits are high speed steel (or better classified
as M2).   It is an air hardening tool steel that has tungsten in it (as well
as other alloys).   Odds are you won't be able to get anywhere trying to
anneal it.

How about a yellow heat and punch it thru? - that won't make for a very
redoable hole - but it may get the tap out.........unless it's not a thru
hole.

This reminds me of the fourth hole I tried to tap in a finished air hammer
ram one day..........I ended torching the dam corner off, welding it up,
redrilling and taping it out again - took 7 hours to get back to where I had
started from, but it was a large piece of square stock I'd taken ages to
find.

Ralph

----- Original Message -----
From: "Roger Olsen" <erik at methow.com>
To: "theforge" <theforge at mailman.qth.net>
Sent: Tuesday, May 31, 2005 11:50 AM
Subject: [TheForge] drill bit stock


> Does anyone out there know the type of stock used in the common hardware
> store high speed drill bits for steel.  Do you per chance know the steps
> for annealing them.
>
> Yes,  I ask because I broke a drill bit in a piece of stock where
> welding, reforging, and repositioning was not an option.  I tried all
> the tricks as well as attemting to anneal as I would a common high
> carbon steel and drill it out but it seemed to have little or no affect.
>
> Thank you,
>
> Roger Olsen
>
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