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Discussion Forum

Cutting tourch settings

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Tyler(wa)

03-21-2000 21:46:41




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My BIL has a medium sized cutting tourch and needs the proper pressure settings for it.

Could someone give me a rundown on these? I would also like to know how to set up the flame because I know nothing about it.

I would like the pressure settings for both Oxy/Accetalene and Oxy/propane cutting if you have them.

Thanks in advance.




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Don't forget the tip size.

03-23-2000 12:51:52




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 Re: Cutting tourch settings in reply to Tyler(wa), 03-21-2000 21:46:41  
Don't forget that you use a different
tip size depending on the thickness
of the metal you're cutting.

You need to find proper guide for your torch to
select the proper tip. Wrong tip and you'll either be burning lots of extra fuel or be really frustrated when it won't cut.

I can post the VICTOR tip selection guidelines if you need same.



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Tim(ny)

03-23-2000 06:01:36




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 Re: Cutting tourch settings in reply to Tyler(wa), 03-21-2000 21:46:41  
Here's another good tip that may not be obvious. If you're using a torch to cut metal to be welded up, you need to cut in a straight line so you can make a strong weld. Get a straightedge like you would use to draw a straight line with a pencil. Clamp a 3/8" or thicker bar to the work and drag the side of the torch tip along as you cut. The tip angle will need to be closer to 90 deg. the thicker the stock you're cutting.

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kimk

03-22-2000 19:39:38




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 Re: Cutting tourch settings in reply to Tyler(wa), 03-21-2000 21:46:41  
Get ahold of "Basic oxyacetylene welding" by Griffen, Roden and Briggs published by Delmar Publishers Inc. ;3 Columbia Circle PO Box 1505 ; Albany'NY. 12212-5015 Written as a text for vocational training.



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Tyler(WA)

03-22-2000 07:07:55




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 Re: Cutting tourch settings in reply to Tyler(wa), 03-21-2000 21:46:41  
I knew I'd come to the right place for this information. Thanks to all of you for the good information.

I'll pass this on to my BIL and we'll put it to use when I re-configure my loader bucket. I need to change the mounts around and add some linkage to model the newer systems. The new linkage methods protect the cylinder from over extending and puts more power to the part of the lift cycle that needs it most.

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Fred

03-22-2000 06:54:31




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 Re: Cutting tourch settings in reply to Tyler(wa), 03-21-2000 21:46:41  
Hello Tyler from Fred, It doesn't take long for a fellow to realize that a welder and torch goes together, does it:<)? Okay, after you checked out all fittings for tightness and seen that it has flashback valves on it (about two inches long and usually installed at the back of the torch), you can open the valves on the bottles. You can open the oxygen valve all the way open because (as I been told) it has a double seated valve and seats closed and all the way open too, because of the high pressure. Open it real slow so it gradually brings up regulator pressure. Set your pressures about 5# acet.( acetylene only two turns open) and 30# oxygen and try it on 1/4" clean steel. You can go up to 10 and 50 on them, but thats only used on 1" and thicker metal. You can tell when they're just right cause the sparks will come out (underneath) at a 45 degree angle ahead of the torch. That don't sound right when the torch is straight up and down but thats how it is. It's a chemical process called rapid oxidation if you want to dazzle somebody. The propane will probably require a little more pressure and hard to light in the wind. The flame cone wants to leave the end of the torch so you have to kinda sneak up on it. They make hoses for acetylene and hoses for all other gasses, but most use what's on hand. Things to stay away from: Acet. pressure over 15#, Torches that backfire a lot (usually pressures wrong), pressure vessels of unknown content including barrels, Using torch within 6' of rig, and the babies milk money on the big projects. If you leave the bottles turned on overnight, back up into that telephone booth and pull on the rope! Have fun...
Long poster of the year candidate, Fred

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Tyler(WA) Thanks Fred

03-22-2000 07:02:34




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 Re: Re: Cutting tourch settings in reply to Fred, 03-22-2000 06:54:31  
Valuable, practical and right on the money.



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Bill Dean

03-22-2000 05:37:09




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 Re: Cutting tourch settings in reply to Tyler(wa), 03-21-2000 21:46:41  
An old welder told that an easy way to remember oxy-acet cutting pressures to remember the WW1 40 and 8 box cars That setting has worked for me.



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Tim(ny)

03-22-2000 05:51:04




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 Re: Re: Cutting tourch settings in reply to Bill Dean, 03-22-2000 05:37:09  
In the welding class I took, the instructor said 7# acetylene, 35# oxygen. He must have dodged the draft. No idea about propane. Increase oxygen until the light blue cone in the flame disappears into the dark blue cone. Keep your tip clean. Don't wear sandles.



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