Which grease for barrel threads and shoulder into action on SR BR gun

[One Eye Pete]

It’s not rocket science. Actually barrel threads are a relatively easy application. Any good high temperature grease or anti seize will do just fine. I’m a retired mechanical engineer that used to
run a power plant. The toughest application I came across was stainless steel oil burner tips (big ones). They were subject to prolonged high temperature heat that would bake out a normal lubricant and being stainless on stainless they would gall at the drop of a pin. For this application we used to use pure nickel based anti-seize. I still use it on my barrel threads cause I have a can of it leftover but it is a bit of overkill. Barrels get hot but not that hot and not for that long. Just make sure you use some good lube on the barrel threads to prevent galling, but the important thing is don’t overdo it especially on the shoulder. As far as copper based anti seize it works just fine too, I’ve never seen corrosion from dissimilar metals on barrel threads. There’s no electrolyte present on a barrel to promote electrolytic corrosion.

 

[Jud96]

Why don’t you guys like anti seize? I’ve heard that before but that’s all I’ve ever used. Thanks

 

[Alex Wheeler]

We like the shoulder to point the barrel and stabilize it. When you pull one off and see copper impregnated in the shoulder you have to wonder if thats what you want. I dont. But many use it with good results. Anything that prevents galling is fine. I use tw25b because its the only grease I use. Works for every application I need.

 

[DaveTooley]

Several decades ago a friend of mine who worked at Piedmont Airlines gave me a Qt. can of red grease that they used on aircraft. Been on my bench ever since. I've also used Jet Lube 550 anti seize. I've moved away from anti seize products. Threads with the proper clearance and any high pressure grease works.

 

[AckleymanII]

High pressure grease that will take some heat, critical to remember. Threads on the muzzle needs a good grease also.

Another really good high pressure grease is made by Dow Corning named Molykote, and there are several different kinds for different applications, the G-n is the type we should use. This grease takes some serious heat!

Dupont / Dow Corning Molykote G-n Metal Assembly Paste 2.8 oz | eBay

® Molykote. It can also be used wherever protection against friction and high load conditions is needed, where burnishing is impractical, or where a paste in aerosol form is desired. Low coefficient of friction allows for effective conversion of torquing force into holding force; reduces the...

www.ebay.com

I believe that this grease is rated to go 1800*, double check.
I got away from Never Sieze types long ago.

I torque my barrels to 80-100ft/lbs

 

[Jud96]

We like the shoulder to point the barrel and stabilize it. When you pull one off and see copper impregnated in the shoulder you have to wonder if thats what you want. I dont. But many use it with good results. Anything that prevents galling is fine. I use tw25b because its the only grease I use. Works for every application I need.

That makes a lot of sense. I’ll be getting some of the tw25b for bolts lugs and thread tenons. Thanks!

 

[DR_2297]

I’ve used just about everything at one time or another…

Lucas Red N Tacky
What ever EP grease I’ve had sitting around…
Copper Never seize - can be prone to galvanic corrosion.
Regular never seize
Stainless (nuclear grade) never seize
ARP (ultra torque) Moly Lube - if it’s good enough for engines it’s good enough for this.

Whatever you use for lubricant watch the drop point rating. Don’t want to go boiling it out of the joint. Most EP greases more than meet the need.

 

[AlNyhus]

I began using Lucas Red N Tacky a couple seasons ago. I know it's a good product as we use it in the race shop with no issues.

But for some weird reason, the break away torque needed to loosen the barrels was extremely excessive. This occurred with four different receivers and multiple barrels.

I've gone back to Permatex Super Lube grease.

Good shootin' -Al

 

[Kiwishooter]

I began using Lucas Red N Tacky a couple seasons ago. I know it's a good product as we use it in the race shop with no issues.

But for some weird reason, the break away torque needed to loosen the barrels was extremely excessive. This occurred with four different receivers and multiple barrels.

I've gone back to Permatex Super Lube grease.

Good shootin' -Al

Al what do you torque your barrel to?
Have you measured the required torque to remove it when using Lucas Red & Tacky?

I've still got a small container with a brush in the lid that I bought from Sinclair International long before they sold out.
It contains a white/off white paste/grease it works Ok so haven't found a need to try anything else......well except when I left it at home so just used the bolt grease I had with me, which also worked.

 

[AlNyhus]

Have you measured the required torque to remove it when using Lucas Red & Tacky?

No....haven't checked the break away torque. But it was high enough that the pucker factor was in play.

 

[Trigger-Jerker]

I use Redline CV-2 synthetic grease for both tenon threads and bolt lugs.

CV-2 Grease

Withstands extreme temperature and pressure in wheel bearings, U-joints, and high-angle CV Joints

www.redlineoil.com

 

[tobnpr]

Copper Never seize - can be prone to galvanic corrosion.

Copper anti-seize on stainless can promote intercrystalline (intergranular) corrosion which is a different animal than galvanic corrosion between dissimilar metals.

Whether this is a genuinely realistic concern in this application is above my pay grade as I'm not a metallurgist- but it's easy enough to use "anything but" copper and alleviate any possibility of it occurring.

 

[jimmymac]

We like the shoulder to point the barrel and stabilize it. When you pull one off and see copper impregnated in the shoulder you have to wonder if thats what you want. I dont. But many use it with good results. Anything that prevents galling is fine. I use tw25b because its the only grease I use. Works for every application I need.

I have had a tube of this for quite some time. Never tried it for barrel threads until this morning.

 

[Bob3700]

Mobile 28 synthetic for bbl threads. Mix some moly powder with the 28 to make EP grease for bolt lugs.

 

[shoot4fun]

About six years ago I went to the local O'Rielly AP and bought a pound (IIRC) of red lithium grease. Just like Brylcreme, a little dab will do ya'.

 

[gunsandgunsmithing]

I believe this is an area that is way over thought. This application doesn't even begin to test the properties of virtually any basic grease. Nothing wrong with a little over kill but I think that's what we are doing here.

 

[LVLAaron]

Q. What type of grease should I put on my tenon thread" ?
A. Yes

/thread

 

[LVLAaron]

Next barrel I'm going to use blue monster teflon tape.

 

[DR_2297]

Copper anti-seize on stainless can promote intercrystalline (intergranular) corrosion which is a different animal than galvanic corrosion between dissimilar metals.

Whether this is a genuinely realistic concern in this application is above my pay grade as I'm not a metallurgist- but it's easy enough to use "anything but" copper and alleviate any possibility of it occurring.

I don’t quite agree with this being the primary mode but we both agree they don’t belong together as a sound engineering solution

 

[jackieschmidt]

I believe this is an area that is way over thought. This application doesn't even begin to test the properties of virtually any basic grease. Nothing wrong with a little over kill but I think that's what we are doing here.

^^^^^^^^^