Cannot remove this thread adapter

[bikemutt]

I have a stainless 5.56 barrel on which I installed a 1/2x28 to 5/8x24 thread adapter. If memory serves me, Rocksett was used. A QD suppressor mount was then installed on the adapter also with Rocksett.

I want to remove the QD mount and adapter.

The suppressor mount came off, no problem but the thread adapter refuses to budge. We've tried heating it with a propane torch, using a reaction rod, you name it. My gunsmith does not want to over-leverage the wrench for fear the barrel may be ruined. He said the only option at this point is to place the barrel on the lathe and trim the adapter off.

At some point I have to weigh the cost of lathe time versus just replacing the barrel.

Any suggestions from THR?

Thanks

 

[rcmodel]

I would be crazy enough to slot it with a Dremel cut-wheel down to the barrel threads and whack it with a chisel and see if I could split it.

Other then that, if you used some sort of thread locker on it.
You just haven't used enough torch to release it yet.

Supposedly, soaking it in water for 24 hours helps to release it.

rc

 

[a5werkes]

Rocksett, manufactured by Flexbar, is a ceramic adhesive capable of withstanding 1500 -2000 deg F !
That is why it is preferred for applications such as suppressors and their adaptors that can heat up to 1,000 degrees; usually thread adhesives such as red Loctite will decompose at half that temperature.

I recently inquired to Flexbar regarding some anecdotal forum reports suggesting soaking the parts in "boiling water" then applying the torque. Here's the mfg. response:

"Water does break down Rocksett so soaking it or boiling it will work. The amount of time is unclear as it will be determined by how easily the water can get to and soak the adhesive. Once it starts to break down, it is easy to remove.

It is a hard ceramic adhesive so you can “crack it out” with a little elbow grease and making sure you don’t damage your rifle."

So before taking the dremel tool to it, might consider a little hot water first.

 

[natman]

Rocksett, manufactured by Flexbar, is a ceramic adhesive capable of withstanding 1500 -2000 deg F !
That is why it is preferred for applications such as suppressors and their adaptors that can heat up to 1,000 degrees; usually thread adhesives such as red Loctite will decompose at half that temperature.

Other than full auto fire, what sort of application generates 1000 deg at the muzzle?

 

[a5werkes]

https://www.riflesonly.com/pro-shop/suppressor-covers/ftw-suppressor-cover-had.html

 

[Sunray]

http://www.brianenos.com/forums/index.php?showtopic=159006

 

[bikemutt]

We finally got it to budge but the reality is the threads had been ruined when the adapter was installed in the first place; it had been over tightened in an effort to time a brake. We ended up shortening the 18" barrel by 1/2", re-threading and re-crowning it