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View Full Version : Seized Barrel In Receiver: The Fix



Rubicon Prec.
04-01-2019, 12:09 PM
This is Robert. Donít be like Robert...

This is a personal project so at least Iím not buying a customer a barrel. This barrel is 1.375 for 5Ē then tapering to 1.010Ē at 32Ē and I have a second one. Losing 1-1/4Ē on the chamber end isnít really going to be the end of the world for me.

So, the threads were not too tight and the barrel had already been screwed on/off hand tight several times during the machining process. I knew it was going to be a while before I could finish this project so I washed the barrel and receiver with hot water and Dawn and dried. A little while later I was sitting in my office (probably after a few cocktails) looking at the barrel, receiver, bottom metal and stock. I figured Iíd screw the barrel on by hand and toss it in the stock to see what it will look like. Well, the dry barrel screwed in just fine....until it didnít. I heard squeak, and it got tight. Tried backing it off and it only went about 1/4 turn. I immediately soaked it with penetrating oil and tried to back it off again. No joy. I knew at this point the receiver would be destroyed if I tried to use tools to unscrew it. It was time to sacrifice a bit of barrel and hope the receiver is OK.

After the tenon was extracted, the receiver looks pretty good. Just one tiny nick on a thread. This receiver is too tall to fixture in my CNC mill otherwise Iíd chase the threads with a threadmill. Iíll probably just run a tap down it to clean it up.

Moral of the story, ALWAYS lube your threads!

Rubicon Prec.
04-01-2019, 12:12 PM
.

Al Nyhus
04-01-2019, 01:13 PM
That rates high on the Pucker Scale. :eek: Nice recovery, sir. :cool: -Al

retired
04-01-2019, 02:31 PM
it is an expensive way to make a poor coil spring...
but i have done it myself( but not based on galled thread)

alinwa
04-01-2019, 09:36 PM
Thank You For That Sir ;)

Just up the way there's a thread Big Al replied to entitled "Gaulin actions" ........ now I gotta be honest here, when I clicked on it my mind was saying "BAT??" ....... and tthis IS NOT to badmouth BAT's in any way but trust me about that pucker factor getting really real when one does exactly what Robert did here on a dry BAT......

But, (my tummy hurts now, I won'r go there :( ) I had one just the other day that surprised me. I'm barreling a few Weatherby's to see can I make one shoot.... And I screwed a LUBED barrel in and got the drea'tful 'squweeek' ...... hmm......


reeeehhh


raaawhh


reeehh


raaaawhhhh.... back and forth.

Finally I just said "p!$# on it, it's a freakin' Weatherby!" and I th'ew 'er in the vice and screwed 'er out. Made about a half-spring.....

Everything cleaned up with just a scar on the tenon thread... and the culprit was


the thru-screw-hole on the action had a wee burr that back-rolled.

Just another thing......

from now on I'm gonna' be run a tap in there on factory actions (actually what I'll REALLY do is run my finger in there.... and cut that scar back open just as it heals over...... the one from shortening action screws, or brushing the chips off the end of that part I just milled a slot in (cuz the brush fell on the floor), or grabbing that hunk of angle out of the cutoff saw....)

jackie schmidt
04-01-2019, 10:35 PM
Nice save.

wfcustom
04-02-2019, 01:14 AM
Robert,
Been there.:p
Done that:mad:
Hopefully will never do it again!
Nice recovery though, I actually saved my homemade spring as a reminder:rolleyes:
Regards,
Greg

Mram10
04-02-2019, 10:07 AM
I like Alís tap idea. I had one gall pretty good, started running a tap with cutting oil to clean things up and havenít had one since. [knock on wood]

Gene Poole
04-02-2019, 11:54 AM
Thank You For That Sir ;)

Just up the way there's a thread Big Al replied to entitled "Gaulin actions" ........ now I gotta be honest here, when I clicked on it my mind was saying "BAT??" ....... and tthis IS NOT to badmouth BAT's in any way but trust me about that pucker factor getting really real when one does exactly what Robert did here on a dry BAT......

But, (my tummy hurts now, I won'r go there :( ) I had one just the other day that surprised me. I'm barreling a few Weatherby's to see can I make one shoot.... And I screwed a LUBED barrel in and got the drea'tful 'squweeek' ...... hmm......


reeeehhh


raaawhh


reeehh


raaaawhhhh.... back and forth.

Finally I just said "p!$# on it, it's a freakin' Weatherby!" and I th'ew 'er in the vice and screwed 'er out. Made about a half-spring.....

Everything cleaned up with just a scar on the tenon thread... and the culprit was


the thru-screw-hole on the action had a wee burr that back-rolled.

Just another thing......

from now on I'm gonna' be run a tap in there on factory actions (actually what I'll REALLY do is run my finger in there.... and cut that scar back open just as it heals over...... the one from shortening action screws, or brushing the chips off the end of that part I just milled a slot in (cuz the brush fell on the floor), or grabbing that hunk of angle out of the cutoff saw....)

Get yourself a COGSDILL BURRAWAY (https://cogsdill.com/products/deburring-tools/burraway/?gclid=Cj0KCQjwkIzlBRDzARIsABgXqV_7zXWJmphcIx8GsEQ hdBH9sKGWKsUpE5fGEYu-o27YQtoFe64-DisaAuHvEALw_wcB) tool or three. I've found those indispensable--especially when cutting 8-40 scope base holes.

retired
04-02-2019, 12:53 PM
everything but prices


Get yourself a COGSDILL BURRAWAY (https://cogsdill.com/products/deburring-tools/burraway/?gclid=Cj0KCQjwkIzlBRDzARIsABgXqV_7zXWJmphcIx8GsEQ hdBH9sKGWKsUpE5fGEYu-o27YQtoFe64-DisaAuHvEALw_wcB) tool or three. I've found those indispensable--especially when cutting 8-40 scope base holes.

wfcustom
04-02-2019, 01:48 PM
(actually what I'll REALLY do is run my finger in there.... and cut that scar back open just as it heals over...... the one from shortening action screws, or brushing the chips off the end of that part I just milled a slot in (cuz the brush fell on the floor), or grabbing that hunk of angle out of the cutoff saw....)

Al,
Thats the way a REAL machinist would do it:)
If you ain't bleeding your not trying hard enough!
Good news is I understand high sulphur cutting oil is a great antiseptic.:p
Greg

Zebra13
04-02-2019, 02:25 PM
A little while later I was sitting in my office (probably after a few cocktails) looking at the barrel, receiver, bottom metal and stock. I figured...

Ahhh...a kindred spirit. I've made some of my soundest decisions after "a few cocktails"...

"I have to have one of those...'click'...be here on Tuesday"...

"Hey...she's not that bad looking"...

"What the $!#? are you looking at, @$$hole"?!

Justin

Don
04-02-2019, 07:55 PM
My experience is the most common cause of the dreaded barrel seizure is the razor thin thread ribbon that is often left at the beginning or end of the barrel tennon thread, which can be easily avoided by slightly back cutting or chamfering the thread ends after the last thread cut pass..............Don

Rubicon Prec.
04-02-2019, 09:03 PM
This is why I blunt start/Higbee my threads. This receiver also had blunt start female threads. I have only me to blame on this one for trying to put it together dry.

alinwa
04-03-2019, 01:45 AM
Get yourself a COGSDILL BURRAWAY (https://cogsdill.com/products/deburring-tools/burraway/?gclid=Cj0KCQjwkIzlBRDzARIsABgXqV_7zXWJmphcIx8GsEQ hdBH9sKGWKsUpE5fGEYu-o27YQtoFe64-DisaAuHvEALw_wcB) tool or three. I've found those indispensable--especially when cutting 8-40 scope base holes.

Well now..... I bet it's been 10yrs since I saw a new-to-me tool ...... seriously, I'm a tool freak. Bad.... goes back to when I was a 6-8 yr-old shaver and Dad would walk me through auction barns, barn sales or just the neighbor's yard and say "OK, what would THAT be used for?" My dad would stop the car, go knock on the door if he saw something he couldn't identify.......I am truly fascinated by tools.

THANK YOU for showing me this, I was unaware :)

Rubicon Prec.
04-03-2019, 01:04 PM
Didnít even need to chase the threads with a tap. I had a test tenon cut from 4130 (I get 1-1/4Ē ground/polished drops cheap from a local metal supplier) used to fine tune the program before cutting the barrel. I put a bit of 800 grit alox lapping compound on it and threaded it in and gave it a few 1/4 turns back and forth. It cleaned up real nice. I can still see where it galled, but the spot is low. Lucked out on this one.