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Thread: How to tell if your carrier key is properly staked.

  1. #21
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    Sure, if the max recommended torque from the engineering calculator is 46, the bolt won't necessarily break at 60.

    Another things is that According to Machinery's Handbook #27, page 1500, torque wrenches are only accurate to +- 25%. So a wrench set to 60 may be just doing 45.

  2. #22
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    This gas key homodom is going to drive me to the Piston forum!
    "You people have too much time on your hands." - scottryan

  3. #23
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    Measuring it off the photo, it is a T25.

    A T25 can handle at least 140 inch-lbs, which seems good.
    Last edited by rsilvers; 10-26-11 at 16:07.

  4. #24
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    I'm not worried about removing the key screws. I want them to stay put until it is time to replace the carrier key, and then it doesn't matter if I have to put the carrier in a milling machine and cut the heads off.

    Agreed, 100 in-lbs is going too far, but as tight as I can get them by hand, and then MOACKS them to death is my preferred method.

    Oh, and "carrier key obsession"? If you've seen as many rifles go down from loose keys as I have, you'd be obsessed, too.
    Last edited by patrick sweeney; 10-26-11 at 16:02.

  5. #25
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    Quote Originally Posted by C4IGrant View Post
    Sure (once I get them up on the website).



    C4
    Well get crackin' Grant! Those bad boys ain't gonna list themselves you know!?!
    My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.

  6. #26
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    Quote Originally Posted by patrick sweeney View Post
    Oh, and "carrier key obsession"? If you've seen as many rifles go down from loose keys as I have, you'd be obsessed, too.

    I've seen it happen too, Patrick. I had a carrier bolt break in one of my guns. It's just a regular topic here... THAT... and which lube you're running!

    That broken carrier key bolt was a tough on to diagnos. Even got by S.A.W.
    Last edited by markm; 10-26-11 at 16:07.
    "You people have too much time on your hands." - scottryan

  7. #27
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    .

    Just curious, what would be the problem of "over staking"?

    It seems that as long as long as you have the screw properly torqued, what does it really matter if it takes 120 in/lbs to loosen the screw, unless you're trying to reuse the screw? Is there maybe a concern of deforming the screwhead which could weaken the screw or maybe deform the Gas Key base?


    .
    Last edited by ucrt; 10-26-11 at 16:10.

  8. #28
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    Quote Originally Posted by ucrt View Post
    .

    Just curious, what would be the problem of "over staking"?

    It seems that as long as long as you have the screw properly torqued, what does it really matter if it takes 120 in/lbs to loosen the screw, unless you're trying to reuse the screw? Is there maybe a concern of deforming the screwhead which could weaken the screw or maybe deform the Gas Key base?
    If there is more than 100 inch-lbs of removal force needed, then the hex-head may strip out before you can remove the screw. Also, there is no evidence that any key which had even 55 inch-lbs of removal force has ever came loose from shooting the rifle.

  9. #29
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    Quote Originally Posted by patrick sweeney View Post
    I'm not worried about removing the key screws. I want them to stay put until it is time to replace the carrier key, and then it doesn't matter if I have to put the carrier in a milling machine and cut the heads off.

    Agreed, 100 in-lbs is going too far, but as tight as I can get them by hand, and then MOACKS them to death is my preferred method.

    Oh, and "carrier key obsession"? If you've seen as many rifles go down from loose keys as I have, you'd be obsessed, too.
    Ya, getting the gas key off is of little concern to me. Getting it on and keeping it on are the priority.


    C4

  10. #30
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    Has anyone ever worn out a gas key and wanted to replace it? I have so far never wanted to remove one.

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