[TheForge] followup on holes in saw blade

[Peter Fels & Phoebe Palmer]

Marc3rd wrote:
> Ok I know I am reaching. but
> What if we took the annealing with the rod a little farther. I have a 
> shoulder bolt and the threaded part has broken off inside the roller it 
> screws into. what if we kept this process going for a longer time? Would it 
> get hot enough to actually weld to the broken off threaded piece.?
Friction welding is done. But it'd be difficult to 
generate that much speed and pressure.
> Or would I be better off trying to anneal it and drill it and use a screw 
> extractor?
Probably.
Using an arc welder to weld through an old nut to the 
broken bolt bolt below works pretty well if the stub 
isn't too deep. A short length of tube helps protect the 
threads.
> Thanks in advance.
> Marc
> Marc V. Davis III
> Marc of the Hammer
> marc at marc3rd.com
> www.marc3rd.com
> 
> 
> 
> ----- Original Message ----- 
> From: "Peter Fels & Phoebe Palmer" <artgawk at thegrid.net>
> To: <mspencer at tallships.ca>; "Blacksmithing List Sponsored by ABANA" 
> <theforge at mailman.qth.net>
> Sent: Saturday, May 08, 2010 1:28 AM
> Subject: Re: [TheForge] followup on holes in saw blade
> 
> 
>> Grin..a tool is a tool.
>>
>> Mike Spencer wrote:
>>> 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-)
>>>
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