[AT] More on torches

[Bill Brueck]

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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