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 79Berlinetta 
Member
Joined: Mar 2005  NY, USA
 Posts: 123 Feedback: 0% (0) |
Posted: 8/1/2012 11:59:48 PM
THE IMAGE ABOVE IS A PAID ADVERTISEMENT Do you have to stake them OR can you use Blue Loctite (removable) instead of staking them? OR would it be better to use Red Loctite (NON-removable) on the cap screws? |
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Posted: 8/2/2012 1:16:16 AM
A member at another web site that I go to told me why any Loctite won't work: the heat produced from firing the weapon will "cook" the Loctite out = DANGEROUS FAILURE!
He also said to torque the two screws to 56 in pounds whereas the video at Brownells says to torque them to 35 to 40 inch pounds. So what IS the correct torque? |
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Posted: 8/2/2012 1:19:32 AM
The sticky in this thread also says 35-40 in lbs, that's what I'd go with
Sticky |
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Posted: 8/2/2012 1:53:06 AM
I personally haven't tried using Loctite.. but staking has been done for a long time and works, so I wouldn't mess with the system. I've never had a screw back out of my staked carriers, and I've never had a need to remove the screws.
If you really had to get the screws out, it wouldn't be too difficult I imagine. |
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Posted: 8/2/2012 2:09:48 AM
[Last Edit: 8/2/2012 2:17:26 AM by dkindig]
I've seen the 56 in-lb figure on Young Manufacturing's site:
http://www.youngmanufacturing.net/stakekeys.php Just checked the Army TM 9-1005-319-23&P, dated 28 November 2008. The carrier key replacement section specifies 50-58 in-lb for the carrier key screws, followed by staking. |
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Posted: 8/2/2012 2:24:14 AM
[Last Edit: 8/2/2012 2:25:21 AM by 79Berlinetta]
I a novice when it comes to building the bolt carrier assembly in regards to those two screws.
I worked as an industrial shift mechanic for many years where I (and my fellow mechanics) used gallons of Loctite thread locker a drop at a time on machines that were in NASTY chemicals! BUT we did see it fail in areas where the fasteners were exposed to heat. The reason that I asked in the first place is that it seemed like staking the screws in seemed archaic = hammer technology at it’s best (or worst). I agree 100% with the statement which you said that (and I'm paraphrasing) billions of those screws have been staked and never failed = (my words) if it ain't broke, don't fix it! |
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ErikO
Smart liberals love guns
Team Member
Joined: Dec 2011 MO, USA
Posts: 1138 Feedback: 100% (17) Link To This Post |
Posted: 8/2/2012 11:24:47 AM
Sometimes the old ways are the best ways. The armorer's field manual says to stake, so that's my suggestion as well.
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Posted: 8/2/2012 1:06:39 PM
Stake them in!
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Posted: 8/2/2012 1:39:20 PM
Sorry I cant figure out how to re-size a linked image  |
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Posted: 8/2/2012 2:24:44 PM
Originally Posted By Thoughtpolice:
http://billbrady.files.wordpress.com/2010/05/steakongrill_00019.jpg Sorry I cant figure out how to re-size a linked image You know I almost posted a picture of a steak myself.. but damn that looks good.  |
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WI57
Breath, Relax, Aim, Squeeze...
Team Member
Joined: Dec 2006 WI, USA
Posts: 7485 Feedback: 100% (15) Link To This Post |
Posted: 8/2/2012 2:33:54 PM
Originally Posted By Thoughtpolice:
http://billbrady.files.wordpress.com/2010/05/steakongrill_00019.jpg Sorry I cant figure out how to re-size a linked image Damn it, now I want steak....  |
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Posted: 8/2/2012 5:25:13 PM
ya loctite fails with heat, but mechanical staking between like metals will not, if done right.....
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Posted: 8/2/2012 8:59:54 PM
[Last Edit: 8/2/2012 9:02:24 PM by JmPnTX]
http://youngmanufacturing.net/stakekeys.php
I used Permatex high strength thread locker gel on the bottom of the key and screws (PN 27010) Then staked with a Brownells tool. |
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Posted: 8/2/2012 9:20:24 PM
http://youngmanufacturing.net/stakekeys.php
I used Permatex high strength thread locker gel on the bottom of the key and screws (PN 27010) Then staked with a Brownells tool. GREAT information on that link! Thanks to all for the replies. I am now educated. |
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jdoming728
Member
Team Member
Joined: Aug 2010 NM, USA
Posts: 1279 Feedback: 100% (1) Link To This Post |
Posted: 8/2/2012 10:12:54 PM
Stake them and in three places per bolt. Loc tite is affected by heat..just don't do it unless your doing both...
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Posted: 8/7/2012 2:06:06 AM
Bought a tube of Red Loctite 27010.
Cleaned all the parts with brake clean. Spread a thin layer of 27010 onto the area where the gas key and onto the 10X32 screws. Torqued the screws to 56 inch pounds. Staked the two screws on three sides. Assembled the bolt carrier assembly and test fit it. Will test fire it tomarrow. |
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Posted: 8/7/2012 4:00:11 PM
Stake or you will get the awesome one shot and no cycling action after a few rounds with locktite period. I just get a center punch and give it two good whacks with a BFH and its good to go after I torque them down to 56#s. And thats the way the govey taught me as well
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PursuitSS
...believe in me, I'm with the High Command.
Team Member
Joined: May 2006 MO, USA
Posts: 3644 Feedback: 100% (15) Link To This Post |
Posted: 8/7/2012 10:42:28 PM
You MUST use the correct Loctite...2620
It is rated to 650 degrees, common red Loctite will fail at 275 degrees. Oh, you still should properly stake your carrier key screws! |
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badazzar15
Spike's Tactical
Industry Partner
Joined: May 2006 FL, USA
Posts: 22681 Feedback: 100% (309) Link To This Post |
Posted: 8/8/2012 2:15:47 AM
Loctite 2620 AND staked.
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Posted: 8/8/2012 12:02:02 PM
Originally Posted By LadCo12:
Stake them in! +1 |
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