[AT] More on torches

[Bill Brueck]

Thanks, all, for the education.  Henry's response is what really
straightened me out, that the O2 is burning the steel, not blowing the
molten away.  I looked up some manufacturer videos on that gouging process,
sure does a neat job!  

If I ever retire I'll look into the arc torches and a few other refinements
to my primitive tools.  I have a godson who recently graduated near or at
the top of his class at Dunwoody in metal fabrication, then went on for
another year in machine programming.  The kid had job offers all over the
place when he graduated, I expect he's making more now than I ever did.  He
does most of my welding now but is eager to help me upgrade my abilities.

Bill Brueck
   Pine Island, MN USA 


-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Cecil Bearden
Sent: Friday, March 11, 2016 9:42 AM
To: Antique tractor email discussion group
Subject: Re: [AT] More on torches

Charlie:
I used to us a carbon arc torch for cutting cast iron when scrapping old
broken blocks, etc.

Cecil

On 3/11/2016 9:27 AM, charlie hill wrote:
> There is a version of that that uses a carbon rod in a welding machine 
> and compressed air.
> It cuts well, almost as well as it creates light and noise!
>
> Charlie
>
> -----Original Message-----
> From: Bill Brueck
> Sent: Thursday, March 10, 2016 6:58 PM
> To: 'Antique tractor email discussion group'
> Subject: Re: [AT] More on torches
>
> I've always wondered why there isn't a cutting torch available that 
> uses 3
> gasses: fuel (acetylene, LP) and oxygen for the heat part, and common 
> air from the compressor to blow the metal from the cut.  Maybe that's
available?
> Probably that's a dumb idea because...?
>
> B²
> Bill Brueck
> Pine Island, MN, USA
>
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Greg Hass
> Sent: Thursday, March 10, 2016 2:49 PM
> To: at at lists.antique-tractor.com
> Subject: [AT] More on torches
>
> A while ago we were talking torches plus LP vs. acetylene. I was 
> having coffee today at the local coffee shop and one of those there 
> owns a welding shop. The subject of LP vs acetylene came up. He said 
> that the ratio of acetylene to oxygen when cutting is about 1 to 1. 
> When using LP he said the ratio is roughly 7 parts oxygen to one part 
> LP so he said its way to costly to cut with LP. One exception he noted 
> was his flame table. He  might put a sheet of one inch plate steel on 
> it and it will follow a pattern and cut exact sprockets for use by our 
> local sugar beet company. Right now he said 90% of his work is for 
> them. Anyway, he said LP works better on the flame table because as it 
> cuts the very outside edge of the sprockets are hardened. When I asked 
> him why he said he doesn't really know, but that is the way it is. He 
> said he has about two dozen tanks around the place and on his trucks. 
> Also he said that on the job LP takes a lot longer to heat before 
> cutting where as with acetylene you can start cutting in a few seconds.
>          Greg Hass
>
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