GTA
All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Topic started by: YEMX on July 20, 2020, 02:03:46 PM
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Kind of... I have sleeved barrels in CF before, but I've never needed to remove said sleeve. Well, looking at all my options for a project I have, I may need to. I glued the sleeve on with Loctite 648. How much of a pain is it going to be to remove the CF sleeve? I have a torch (MAP gas), so I can heat up the sleeve. But will that amount of heat be sufficient to break the Loctite 648 free? I'm hoping I don't have to machine the sleeve off- I hear CF is really tough on tooling.
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With my experience working on polaris slingshots the rear pully used 648 and some time it took me an hour using a map torch to get it off. Some times the nuts would require lots of heat and a very powerful impact to get them to budge.
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That's what I'm afraid of...
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I had worked for a place that glued a liner into a receiver lug using loctite. When they assembled them wrong. We would put them in the oven at 350 deg. F to take them apart.
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Since the sleeve will probably be toast afterwards anyways, I'd consider chucking it up to spin it and just grind it all off . . .
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Since the sleeve will probably be toast afterwards anyways, I'd consider chucking it up to spin it and just grind it all off . . .
That's what I was going to say. Most likely the resin system that was used to make that tube is a room temp cure and won't tolerate much more than 150f. There are some RT cure resin systems used in aerospace that with a post cure will go much higher but they are a lot more expensive and as such the tube would've been very expensive.
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The 648 can withstand temps at 300° odds are the resin in the CF may deteriorate first.
https://www.henkel-adhesives.com/us/en/product/retaining-compounds/loctite_648.html (https://www.henkel-adhesives.com/us/en/product/retaining-compounds/loctite_648.html)
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I got the sleeve off... Well, as much of it off as I need to, at any rate. Chucked it up in the lathe and carefully cut it off with tooling. Finished with a couple grits of sand paper. The Loctite 648 hadn't cured in 2 spots... Which is odd. But it also makes me wonder about my other sleeved barrels.
Thank you Gents, for the suggestions! 'Preciate y'all!
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Tom, I've had the same experience with the loctite not curing completely in -parts of the sleeve to barrel.
Now here is an easy way to remove it. With a fine composite blade, cut 2 to 4 grooves long ways as close to the barrel as possible with out damaging it. Take a narrow chisel with an angle on only one side of the blade. With the sleeved bbl. in a padded vise, start at one end and tap muzzle to breech. CF does'n not like liner stress once the material is compromised as it will crack. Just tap lightly, and it will begin to split.
Mike
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Tom, I've had the same experience with the loctite not curing completely in -parts of the sleeve to barrel.
Now here is an easy way to remove it. With a fine composite blade, cut 2 to 4 grooves long ways as close to the barrel as possible with out damaging it. Take a narrow chisel with an angle on only one side of the blade. With the sleeved bbl. in a padded vise, start at one end and tap muzzle to breech. CF does'n not like liner stress once the material is compromised as it will crack. Just tap lightly, and it will begin to split.
Mike
I'll definitely keep this in mind if I need to remove any sleeves in the future!! Thanks Knife!!
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Any time Tom! ;) 8)
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If you are turning or grinding CF, make SURE you wear a mask, the dust particles are about as friendly to your lungs as asbestos.... ::)
In addition, make sure you cover up the ways, crossfeed, gibs and lead screw of your lathe, as the CF dust particles are hard and abrasive.... similar to the damage you can get from silicone carbide grit from sanding paper.... :o
Bob
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If you are turning or grinding CF, make SURE you wear a mask, the dust particles are about as friendly to your lungs as asbestos.... ::)
In addition, make sure you cover up the ways, crossfeed, gibs and lead screw of your lathe, as the CF dust particles are hard and abrasive.... similar to the damage you can get from silicone carbide grit from sanding paper.... :o
Bob
I'll make sure to remember this if I ever have to remove a sleeve this way... ???
Also, it looks like I have a lot of cleaning to do... :(
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Mr. Bob is correct. I always refused to use it on folders as it was so dangerous. The cf dust is shards that will enter the lungs and bury in. Never leaving!
Knife
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Well, if any got in my lungs, I'll just add it to the myriad of things that are/will be wrong with me! But I shan't do something like this again w/o the proper precautions, that's for sure! I very much appreciate all the help y'all! 'Preciate y'all!