i need schooled on torching

my knowledge for using a OA torch to heat and remove stuck parts is really slim. that being said i tried to teach my self today on a stuck spring perch and had no success. is it possible that its seriously stuck or am i just not doing it right. i dont know how hot is too hot so i was kind of shy when heating the axle because id rather not ruin anything but the spring perch. how hot should i get it? any tips from you pros on this? thanks

 

oh and last night i mixed atf and acetone and let it soak for an hour or so and that didnt do a damn thing either

 

Bring it over to my house, I'll show you.

 

Safety first! GOGGLES!!!GLOVES!!! Which head are you using? cutting head? Rosebud? Are you heating the right part of the object thats stuck? Sometimes heat and let it cool 3 times then try to unstickit...sometimes heat part cherry red and try to move it,all depends on what yer doin and heatin...Be carefull above all else! Signed,Fire eater!

 

man i wish. i have no one that i know thats into hot rods or mechanics so im literally teaching my self everything.

 

There ya have it! Tis easier to show ya! Now...ya better fuel up!

 

im using the rosebud tip. im heating the axle area aroung the spring perch. the wishbones are loose so im tring not to heat them to much. cherry red is what i was scared to do. it wont damage it if i get it that hot?

 

Have you tried a hydraulic press? Much less violent that the hammer and torch method.

If it's really sticky, follow redlineracer's advice by repetitive heating and cooling to try to break up the rust between the perch and boss.

 

i dont have access to a press . i also mad the mistake of mushrooming tip of the perch. so i cut it bleow the mushroom drilled a hole in the end and welded a rod in it so i can hit it out

 

Seriously though, a rosebud with a decent amount of gas flowing should get it hot enough.

Since we can't see your technique over the interwebs it's hard to tell what you're doing.

 

I like to get it nice and hot and dribble candle wax into it as it cools down, giving it some twisting and whacking.

Sometimes it will take multiple attempts, sometimes I get it the first time.

 

Ok that pic helped. What does the candle wax do? Mine wasn't near that hot. I heated the area up for a min or so then pounded then repeated. I'm gonna give it another go around tomorrow. Thanks guys.


Posted from the TJJ App for iPhone & iPad

 

Can anyone tell me what the candle wax will do and if its necessary in this process?


Posted from the TJJ App for iPhone & iPad

 

The candle wax gets wicked into the joint much like solder gets wicked Into a joint.
It breaks the bond of the rust between the axle and the perch bolt .

Try to heat the bolt . Get the ends sticking out as hot as you can, the heat will travel along the bolt.

Here's the trick - get the bolt as close to white hot without turning the axle red. Let it cool and repeat at least three times.

Here's the science - as you heat it the bolt expands in both length and diameter. If you got it hot enough , it shrinks beyond its original size. The heat related expansion and contraction breaks the rust bond. The heat related expansion and contraction is more powerful than a hammer or press - just not as much movement measured in distance.

Hope the helps

 

i like that candle idea iv never herd that . just in case you dont no its important to let anything you need to reuse cool on its own dont go stick it in the sno bank. and idont know if its true or not but iv herd its a good idea to lightly tap with a ball peen hammer to relive stress.

 

Where are you located in Nebraska?

 

Oldnuts,

When I took the kingpins out of my 33 Ford circle track car I had to get after them pretty aggresively both with the heat and the hammer.

I did the self taught thing with torch too. Both cutting & welding. Get along with it ok today. Not a wizard but can get it done.

First thing. Are you using gogles? If you look at the heated part with the naked eye or sunglasses, you probably are not getting it hot enough. Heat the part to orange using goggles then with axle solidly supported, get after it with a 2 or 3 lb hammer. Don't be shy. Those parts have been in place for a long time...they are Zen metal...all is one. It will take some convincing to get them apart.

Where are you in Nebraska? I'm on the border in South Dakota.

Good luck
Worken2much

 

Just rember when you heat somthing it will expand in every direction if it can. If put a short rod in a vise and heat it red hot the vise will keep it from expanding in one direction. When it cools it shrinks in every ditection and will fall out of the vise. But has to be red hot or close the where the metal loose it's strength

 

I'm located in omaha. I'm gonna take all your guys tips and advice and try to get her loose today. Ill keep you guys posted. My main problem was that I was scared to get it that hot because I didn't want to cause damage.


Posted from the TJJ App for iPhone & iPad

 

Must be at least a 1/2 dozen hambers in Omaha. You might also check out the local schools & colleges for auto workshop classes.

 

Think how hot they get them when thay do a droped axle. Heat it and let it cool back down then try.

 

some can be so stuck that even with heat and a press thay do not want to move.

 

Same thing on my 39 front axle.
It was soo stuck I had to drill it out...7/8" drill right through the pin to split it in half...just wanted the bones off.
PS. I'm ditching the axle.

T

 

I was successful at removing the perch. My only question now is is this bad? I got a bit to close to the axle and it splattered



Posted from the TJJ App for iPhone & iPad

 

Yep, too hot!! Yowsers!! What kinda tip were you using?

 

I used a rose bud tip. I was about 1/2 in away from the axle when it splattered. Will that harm the strength of the axle any?


Posted from the TJJ App for iPhone & iPad

 

I'm no metallurgist but I'd guess so. Worse things have been run.

We'd better get 38Chevy454's attention to this thread, he'd know for sure!

 

no, i think you'll be alright, they'll take the heat, it doesnt look like you did much damage, lighting grind it, maybe use a 7018 rod (hard but flexable) and weld up the spot. and grind it smooth. just my .02

 

Holy crap that axle was hot to do that .
What was wrong with heating the bolt as hot as possible ( white) and stopping before the Axle turned red, let cool and repeat ? Like post # 14

The damn things nearly fall out , well maybe they need a tap from someone's little sister but ...

 

couldnt tell you if its still good. i wasnt there to watch but you would be supprised ad how many times you can heat something and its still good. did you check to see if it moved at all. most times when you do that it will shrink where you heated it. i would say take some measurements, pull a string line along it and see if when it shrunk it moved in any certain direction. clean it up and take another picture of it. if it looks straight and its made of steel you can probably just fill the pit with weld and buff it out.