[TheForge] followup on holes in saw blade

[Jerry Frost]

I don't remember when or from whom I learned about using friction to take 
the hard out of high C for drilling, maybe jr. high school or high school 
metal shop.

There's not a darned thing wrong with a field expedient ballistic punch so 
long as common sense and basic safety precautions are observed Mike. It's 
the same for any really effective tool like oh say a muscle car or an ax.

Jer
-------------------------
If it ain't forged
It ain't real
wrought iron is
The Frostworks



----- Original Message ----- 
From: "Mike Spencer" <mspencer at tallships.ca>
To: <theforge at mailman.qth.net>
Sent: Friday, May 07, 2010 8:31 PM
Subject: [TheForge] Re: followup on holes in saw blade


>
> Frosty wrote:
>
>> I think I mentioned this early in the thread but I've had very good
>> luck annealing hard high C steel for drilling by chucking up a piece
>> of round steel rod about the same dia as I want to drill, then with
>> it turning I press it into the part where the hole's to go. Once the
>> part turns red I retract the rod, let it cool and drill.
>
> Very clever.  I must have missed it before.  I might even experiment
> with just pushing the rod until some light blue shows up around the
> hot spot -- all depending on just what the workpiece is.  Have to
> remember that.
>
> I think my most bizarre hole-making was on my very first forge. Utter
> novice that I was, I had struggled to form a sheet metal cone-shaped
> hood and bolt it to the little forge only to discover that I needed
> 1/4" aligned holes through two layers of sheet metal to fasten the top
> of the cone together.  Too springy to drill. Dreaded starting over by
> taking the the horrible, floppy, springy thing apart. So I clamped the
> metal and a Balkan Sobranie can [1] full of sand together and shot a
> hole in it with a .22 short. Worked great.
>
>
> Tnx Frosty,
> - Mike
>
> [1] Balkan Sobranie is no longer available so you can't make holes
>    this way any more. 8-)
>
> -- 
> Michael Spencer                  Nova Scotia, Canada       .~.
>                                                           /V\
> mspencer at tallships.ca                                     /( )\
> http://home.tallships.ca/mspencer/                        ^^-^^