[TheForge] drill bit stock

[David E. Smucker]

Might work Justin.  What you describe is the tool steel most likely going 
"hot short" at the high temperature.  Also might try heating real hot 
followed by a shot of water or blast of air to quench it causing it to 
crack.  Glad it is not my  problem today -- but something we could all run 
into at any time.

Dave Smucker
----- Original Message ----- 
From: "Justin Fellenz" <sunironworks at yahoo.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Tuesday, May 31, 2005 8:51 PM
Subject: Re: [TheForge] drill bit stock


>I had an interesting experience with drill steel--I tossed a broken bit
> into the forge to see whether it might make a good damascus layer and
> it turned into melted sharp cheddar cheese, a kind of grainy mess with
> a less viscous liquid around it. It just drooled off the tongs. It
> didnt seem to be hot enough to be burning, though...wonder if you could
> heat the peice enough to more or less liquefy the drill bit?
>
> Or you could take it to red and sacrifice a drill bit, see if you could
> drill it out hot...no idea if that would work.
>
> Justin
> --- Ralph Sproul <brhlbsmt at mcttelecom.com> wrote:
>> 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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