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Thread: Why Do limb Bolts Back out?

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    Default Why Do limb Bolts Back out?

    I have noticed on my bow that the limb bolts back out an 1/8 to a 1/4 turn in as little as 20 shots. I have never let them go any further so I don't know just how far they would go. I have the bolts backed off 5 turns to condition my muscles to shooting and wonder if this has something to do with it?
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    I think five turn's is to much to have them backed out. I'm purty sure your not supposed to back them out more than 4 turn's if your still planning on shooting them. What limb's do you have 45-60- 55-70? Also, do you know what poundage your shooting at the moment?
    Last edited by martinbowhunter; 03-31-2011 at 03:13 PM.

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    Quote Originally Posted by MLN1963 View Post
    I have noticed on my bow that the limb bolts back out an 1/8 to a 1/4 turn in as little as 20 shots. I have never let them go any further so I don't know just how far they would go. I have the bolts backed off 5 turns to condition my muscles to shooting and wonder if this has something to do with it?
    Have you checked the gap between the limb and riser w/ a feeler gauge. I was wondering if it is all limb bolt movement or is the facing washer rotating also with the rotor cup limb support in close proximity could you be getting a teeter-totter effect??? (due to the 5 turn back off)...I'm no pro but was just wondering. That type of vibration might back out the bolt.
    Chasman, 2010 Martin Bengal 60#,Parker Phoenix 60#, Parker Hornet 70#. Hutch-n-Son strings.'Makes a lot of sense if you don't think about it!

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    I'm thinking you should go one full turn in on the limb bolt's minimum. I'f you will be able to pull it back. Try it out. I think this will solve your problem. And yes, check to make sure it's not just the washer, as the poster above me mentioned. So put a mark on the lims also. Do you have a bow scale?
    Last edited by martinbowhunter; 03-31-2011 at 03:30 PM.

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    String builder/ Super Moderator Hutch~n~Son Archery's Avatar
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    I don't believe the limb bolts are backing out. I believe the outer washer is spinning. Do to the same reasons mentioned above. The limb bolts can be out 5 turns but it would be better for them to be out only 4 turns, putting more pressure on the bolt and limb washer.

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    I have had it at 4 turns out and it did it there too. I will mark the washer to limb and see what that shows. The washer doesn't turn when rotating the bolt but who knows?

    The limbs are 45-60#
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    String builder/ Super Moderator Hutch~n~Son Archery's Avatar
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    Quote Originally Posted by MLN1963 View Post
    I have had it at 4 turns out and it did it there too. I will mark the washer to limb and see what that shows. The washer doesn't turn when rotating the bolt but who knows?

    The limbs are 45-60#
    Line up the white dots then put a piece of scotch tape over both the washer and limb bolt. Then shoot for awhile. Then you will see if it is the washer.

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    I think the guys are on the right track. One thing I do, after my bolts are set where I want them, I always put a mark on the bolt head in line with the split in the limbs. Basically, bottom dead center on the top bolt, top dead center on the bottom bolt. That way, I always have a mark regardless of what happens to the washers, etc.
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