Thermal Lancing (yikes!!)

[stingray1]

Thanks to all for the education.

 

[mrmikey]

I prefer the ambient compressed air ones myself. No bottles to contend with, just the engine driven compressor. Pretty easy to build one actually and the lance rods are available at most LWS

Never seen those, I've only seen/used the ones that need oxygen. Any idea what keeps the fire going? I didn't think anything but pure Ox would keep a burn going like that.
I'v seen videos of them cutting casting risers using a long piece of 1/8 steel pipe thats heated to red and then fed oxygen thru it to keep it going but never just compressed air..............Mike

 

[gsganzer]

This video showed a good tip of first welding a slag deflector that also acted as the centering guide to help control the lance.

Thermal lance

 

[5030]

Never seen those, I've only seen/used the ones that need oxygen. Any idea what keeps the fire going? I didn't think anything but pure Ox would keep a burn going like that.
I'v seen videos of them cutting casting risers using a long piece of 1/8 steel pipe thats heated to red and then fed oxygen thru it to keep it going but never just compressed air..............Mike

The tubing is filled with phosphorus rods (just like a sparkler but bigger and longer) so just compressed air keeps the fire burning. We used a Joy engine driven screw copmpressor.

 

[5030]

With basic machine tools (engine lathe) and some off the shelf parts (pressure washer handgun) you can build one. Instead of high pressure water you valve the air. The burning rods aren't cheap and they go pretty quick.

 

[5030]

The one we used for cutting bolster plats was basically just a pipe with a WOG valve on the holding end and a collet to take the tube with the rods inside and the rods we used were 5 feet long. You could cut a bolster plate like hot butter. Very dirty though. We lit ours off with a gas axe, not a battery.

 

[mrmikey]

The tubing is filled with phosphorus rods (just like a sparkler but bigger and longer) ........

OK thanks, didn't know there was such an option. Depending on the price of the rods compared to regular lancing rods, it'd probably be cheaper, the oxygen drains fast using that method.......Mike

 

[5030]

Oxygen drains fast, tanks frost up and regulators freeze too.

 

[denchen]

What about a completely different thinking. What about freezing the whole lot, long enough to cool the pin in the centre, then hit the outside with some heat followed by some serious pressure or sod off hammers. Just thinking, it must have gone together, surely it should come apart.

 

[ray66v]

A pneumatic chipping hammer with a blunt bit, is good for removing king pins.

It's like a hand held jack hammer.

Check for a local pneumatic tool repair shop to see if they have a used one you can rent.

I would apply heat first.

For get the oil, it's not going to do a thing.