Im just after fitting a stainless moderator to a stainless barrel and yes you guessed it, it flowed on beautifully couldnt have a nicer feel to it when my world fell apart. Tried to unscrew it and oh my god,the fuckin thing is solid. Its my own fault for not using some copper grease. Anyway can anyone offer some anti suicidal words of advice that may get me out of this. I already tried heating.
Gunsmithing Moderator siezed to new thread
- Thread starter gamma
- Start date
Re: Moderator siezed to new thread
barrel in padded vice....and don't crush the "moderator" with a leather padded pipe wrench....like wnroscoe says go slow...
barrel in padded vice....and don't crush the "moderator" with a leather padded pipe wrench....like wnroscoe says go slow...
Re: Moderator siezed to new thread
Im not in the states so kroil is not something Ive got on hand. Any other suggestions. This has never happened to me before. Do you think its going to be alright or will the threads be gauled. WD40 ?
Im not in the states so kroil is not something Ive got on hand. Any other suggestions. This has never happened to me before. Do you think its going to be alright or will the threads be gauled. WD40 ?
Re: Moderator siezed to new thread
the machinist side of me says grab hold of the barrel with some kind of WELL padded vise, take hold of the "moderator" with a pipe wrench or something of the like and yank on it till it comes loose... but for the rifle's sake, listen to wnroscoe!
the machinist side of me says grab hold of the barrel with some kind of WELL padded vise, take hold of the "moderator" with a pipe wrench or something of the like and yank on it till it comes loose... but for the rifle's sake, listen to wnroscoe!
Re: Moderator siezed to new thread
Thanks for all the advice guys. Anyway tried everything and to no avail. In the end I took the pipe wrench approach with a lifting strap, wrapped the strap around tightly and connected the bar to the strap and began twisting,the strap locked around the mod pretty solid and I managed to wrench it off. Threads on both parts were f**ked but all was'nt lost as I managed to rethread both mod and Rifle, but this time I used copper grease which I should have used in the first place anyway. It,s a custom barrel which I left a little over on the length in case I needed to make any changes for the customer after. This was a painful lesson to learn and one for everyone here to take on board,aways use copper grease when messing with stainless to stainless.
Thanks for all the advice guys. Anyway tried everything and to no avail. In the end I took the pipe wrench approach with a lifting strap, wrapped the strap around tightly and connected the bar to the strap and began twisting,the strap locked around the mod pretty solid and I managed to wrench it off. Threads on both parts were f**ked but all was'nt lost as I managed to rethread both mod and Rifle, but this time I used copper grease which I should have used in the first place anyway. It,s a custom barrel which I left a little over on the length in case I needed to make any changes for the customer after. This was a painful lesson to learn and one for everyone here to take on board,aways use copper grease when messing with stainless to stainless.
Re: Moderator siezed to new thread
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: gamma</div><div class="ubbcode-body">This was a painful lesson to learn and one for everyone here to take on board,aways use copper grease when messing with stainless to stainless. </div></div>
When you threaded the barrel did you use a go/no go thread ring gauge or the suppressor as the gauge? When threading for suppressors one must use gauges in order to avoid this type of incident. Also, when installing brakes, suppressors or anything else for that matter including barrel to receiver, similar metals will and do seize. Copper based anti-seize is a must.
If the suppressor manufacturer calls for a Class 3A or 2A thread fit, use a gauge. I’ve seen way too many out of spec suppressor threads.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: gamma</div><div class="ubbcode-body">This was a painful lesson to learn and one for everyone here to take on board,aways use copper grease when messing with stainless to stainless. </div></div>
When you threaded the barrel did you use a go/no go thread ring gauge or the suppressor as the gauge? When threading for suppressors one must use gauges in order to avoid this type of incident. Also, when installing brakes, suppressors or anything else for that matter including barrel to receiver, similar metals will and do seize. Copper based anti-seize is a must.
If the suppressor manufacturer calls for a Class 3A or 2A thread fit, use a gauge. I’ve seen way too many out of spec suppressor threads.
