Thread: Oxy heating tip vs welding tip

Originally Posted by Matt_M

Howdy fella's

I'm bending some reo for some crafts i'm making and am using a 26 tip currently which works fine, but was wondering what the heating tip you can buy is used for. Obviously heating ?

When would it be used rather then a welding tip ?

Cheers

Matt

Totally different flame shape.
Welding is an elongated flame produced by one orifice = maximum temperature concentrated on smallest possible spot.
Heating is rose shaped flame produced by multiple orifices = maximum overall heat energy on a large area

Funny coincidence... I was just about to start a new thread to show a vice repair and this thread showed up.
The connection is that I had to preheat my broken 5" Dawn vice to try and repair it by brazing.

I used a largish cutting torch to do that (without pressing the cutting oxygen of course). That gace a nice large multi-jet heating flame to heat this large lump. I've used that method to bend thicker steel in the past successfully. This might be worth a try for you Matt in lieu of buying another nozzle.

Back to my vice, briefly:
The photos show where it broke (from misuse). So yesterday afternoon I cleaned it thoroughly, ground large chamfers on both sides of the break, drilled and threaded through the smaller part into the chuck body and screwed in a couple of large countrersunk bolts to position and hold the parts together securely. I then heated the two parts thoroughly and evenly on some insulating bricks and fluxed the joining surfaces thoroughly. Then swapped torches to a No 15 welding tip and filled the gaps with bronze rods. I must admit that this was one of the most difficult brazing jobs I've done - mainly because of the sheer mass of the vice.
I let the thing cool down very slowly ove several hours last night and it was still warm by midnight. I took a couple of photos this morning and will clean the whole thing up today, repaint and reassemble and put up progress photos when I'm done.
In terms of gas and filler use and time spent, this may not have been a worthwhile exercise, but it is a DAWN vice and the task my teach me something about attempting future repair jobs - along with being more caring about abusing tools like this.....
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Great. Thanks guys.

Just went and bought a heating tip another item to add to my collection and it's justified too

Will post a pic of my massacred finished product when done.

I look forward to your artwork, Matt!

Just finished my vice, to wrap up my thread hijack....
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Just be aware that the really large heating tips are designed for oxy lpg as you cannot draw sufficient gas from an acetylene cylinder unless you manifold two or more together. Trying to run too big a tip for your draw off rate, which varies with cylinder size, leads to liquid rather than gas being fed to the torch and soot at best or backfiring and potential flashbacks at worst.