oxy-acetylene cutting torch

[Satatic]

I need to cut some "aftermarker" front spring mounts off my 68 camaro it is basically a 1/4 inch piece of C channel and some 1/8 inch box tube welded between the rear frame rail and the lower lip of the rocker panel. I spent like 3 hours cutting and grinding on one side yesterday and still not done so I thought I would use an oxy-acetylene torch to cut off the bulk of the other side. I just do not understand how to set the thing up I always end up with a huge flame like probably at least 10 inches of flame and I can't have that under there melting a hole in the floor. Is that just the way it is, is it not possible to get a small flame out of the thing? I understand nothing about the torch and the internet hasn't helped the most I can find is to set the regulators to 5psi. I don't know anythign about the tips again the internet hasnt helped.

 

[krusty the clown]

you can adjust the flame by turning the knobs. for cutting you probably want 7 psi of acetyline and 20 psi of oxygen. close the knob on the cutting tip and open the oxygen knob all the way on the handle. open the acetyline knob just a little and light the torch. open the knob on the tip slowly until you see the little blue cones at the tip........you can then adjust the torch for more or less flame by opening or closing the acetyline knob then readjusting the oxygen. it won't take long playing with it to figure it out.

 

[eschoendorff]

WWFD????

(what would franz do????)

 

[Uncle Buck]

WWFD????

(what would franz do????)


[/QUOTE

Probably tell you the correct way, but only after he demeaned you a bit so as to help his warped, bloated ego! Pleeaze let him go!

 

[russlaferrera]

Merkava your brain is rusty. Go with Krusty. There are 3 knobs 2 oxygen and 1 acetylene. Open the oxy on the handle to the full position. Open the acet and lite the torch. open the oxy on the cutting torch and adjust the flame.

You have great information in your post, You messed up on the handle oxy adjustment. At times it's hard to convey instructions to someone.

 

[nissan_crawler]

If you want to avoid any soot, you can open the oxy a wee bit when you light the torch, and it'll burn clean. You'll get a bit of a pop when it lights.

 

[Merkava_4]

Merkava your brain is rusty. Go with Krusty. There are 3 knobs 2 oxygen and 1 acetylene. Open the oxy on the handle to the full position. Open the acet and lite the torch. open the oxy on the cutting torch and adjust the flame.

You have great information in your post, You messed up on the handle oxy adjustment. At times it's hard to convey instructions to someone.

Since it was such inaccurate information, I deleted the post.

 

[Red Green]

Merkava Could you please put the link for the tips and sizes back up.

 

[Charlie's68]

I prefer 5 ac/ 30 oxygen myself, for pretty much any cutting....



Do a google search for neutral, carburizing, and oxidizing flames, and what each do.
this will give you a pretty good indication of what you want.

 

[toxicz28]

There are 3 knobs 2 oxygen and 1 acetylene. Open the oxy on the handle to the full position. Open the acet and lite the torch. open the oxy on the cutting torch and adjust the flame.

Not on all torches. If he has a combination torch, sure. But if it's just a cutting torch, only two knobs.
Pressure settings will depend on tip size. For a #0 or #1 sized tip, I would recommend 4 or 5 psi on the acetelyne, and 20 to 25 psi on the oxygen.
Also note, you will warp the **** out of the sheet metal using a cutting torch on it. So leave plenty to trim up later on.

 

[Satatic]

I dont think i'm gonna try it now I only have inches between this stuff and the floor and I replaced the rockers and coated the insides to prevent rust and heat will easily destroy that coating. I think i really need something like a plasma cutter but i don't think that is gonna happen.

 

[Junkman]

could you use a cut off wheel or a saws all? Either one would be a lot safer than trying to use a torch in a area that is so confined, especially when you don't have the experiance neccessary to do it safely. Is the gas tank still in the car? If so, you don't want to be under there with a torch under any conditions....

 

[russlaferrera]

Not on all torches. If he has a combination torch, sure. But if it's just a cutting torch, only two knobs.
Pressure settings will depend on tip size. For a #0 or #1 sized tip, I would recommend 4 or 5 psi on the acetelyne, and 20 to 25 psi on the oxygen.
Also note, you will warp the **** out of the sheet metal using a cutting torch on it. So leave plenty to trim up later on.

Good point, well taken. I wish to amend my post to "on a cutting torch there are only two "2" knobs. On a combination torch there are three (3) knobs. Most of us have this type of torch."

As per the SMITH Equipment chart. a O tip is 35# oxy and 10# acet., a 1 tip is 45# oxy and 10# acet. As the tips get bigger the Oxygen pressure goes up , but the Acet .pressure stays the same 10# . I find the higher pressure eliminates any back burning in the handle. As always, never exceed 15# on acet. as it becomes unstable.

 

[Merkava_4]

Merkava Could you please put the link for the tips and sizes back up.

Hooper Welding Supply Tip Chart

 

[russlaferrera]

Hooper Welding Supply Tip Chart

MERKAVA, Thanks for posting the chart. I notice there is a large difference in pressures, between Torch Brands. For a Smith Equipment 0 Cutting tip my chart shows 10#, double the pressure for acetylene that your chart. Wonder why? I was under the impression all were the same. Blew that theory out of the water.

WE learn something every day. NOW to remember it!