Stuck takedown sleeve.

[Hamish]

I have a couple of nice unused takedown sleeves that I bought a decade or so. When new I could take them apart, but now they are stuck.
I don't want to potentially distort them with force, I've tried to use a heat gun, and pliers to loosen the joint, unsuccessfully. Unless anyone's got any bright ideas, my next try will be with an oxy/propane or mapp torch

[superdav95]

Are they Steel on steel or brass on steel?  You could try the other extreme and use freezing.  Dry ice in middle of center sleeve to shrink it ever so slight to get it to budge.  I wonder if it has oxidation bi dong them??? 

[willie]

the heat gun heats too slowly and heats both at the same time.

  You could try the other extreme and use freezing.   

use both heat and cold.

freeze a long soaking wet tight wood plug into the degreased inner.
have a dowel or bolt to use as a driver and a clamp for gripping the outer
once frozen, apply heat with the hottest torch to the outer sleeve only. apply heat as fast and hard as possible for a short time to the outer such that the heat does not have time to transfer to the inner
a timely whack on the thru dowel.......

[Eric Krewson]

No one mentioned penetrating oil, it is made to free up seized stuff.

[GlisGlis]

No one mentioned penetrating oil, it is made to free up seized stuff.

+1

[Hamish]

 Stellar input guys, I knew the PA brains trust would come through, with some great ideas. The sleeves are steel female, with brass male.

I'll purchase some Kroil, and give it a go. Thanks.

[JW_Halverson]

Stellar input guys, I knew the PA brains trust would come through, with some great ideas. The sleeves are steel female, with brass male.

I'll purchase some Kroil, and give it a go. Thanks.

If you don't have a little Kroil in the garage are you really a guy???   

[Hamish]

JW, Lol Down here in Australia, unfortunately Kroil is pretty much unknown, never seen it in a store. We generally get by with some sort of WD-40 variation. I only saw Kroil a couple of years ago on a youtube video of a craftsman whom I have much respect for. He swears by the stuff. I can get an 8oz can of Kroil off a big CO that sounds like a Sth American River for $63 AUD which is about $42 USD.
Thanks to Eric for bringing up the subject of penetrating oil, I hadn't even thought about trying it.

[mmattockx]

The sleeves are steel female, with brass male.

Brass has a thermal expansion coefficient about 50% higher than steel. I would guess putting them in the freezer for a couple hours would help loosen the brass side up significantly. Heating is the wrong way to go, making the brass sleeve tighter in the steel sleeve as they heat up.


Mark

[Hamish]

Thanks Mark for your scientific expertise. I'll keep that in mind.

[Eric Krewson]

The best penetrating oil is 50/50 acetone and type F auto trans fluid.