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Thread: Recurve Limb Bolts

  1. #1
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    Recurve Limb Bolts

    I am trying to obtain more details about riser limb bolts regarding an industry standard of size of which after much searching I am unable to find.

    I occasionally have the situation of tight fitting limbs which is often cured by opening up the limb dovetail by a little sanding. However, the problem is not always due to the limb tolerance. I have discovered lately that the problem is due to the thickness of the limb bolt itself. After a recent purchase I found one of the limbs to be excessively tight and after checking I found that one of the limb bolts was 0.2mm thicker than the other. Now you may say that 0.2mm is not much but in manufacturing terms this is a lot. The retailer is going to replace this bolt by the way.

    After checking quite a few limb bolts I have found that most are made with a diameter of 9.4mm and I would appreciate some feedback on this topic.

    I did a search to find out about the industry standard on this without any success. I have dug out various patents on ILF fittings and while they all give highly detailed descriptions and drawings no specific sizes are given.

    So, does anyone have an answer to this.

  2. #2
    It's an X AIUK subscriber. Rik's Avatar
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    You're not going to like this answer...
    There is no standard. None. ILF is a fiction.

    It all stems from when Hoyt invented the fitting and didn't protect it from copying. Other manufacturers copied it and made their own versions. They, more or less, work together (some more, some less) but it's quite possible to find combinations which can't be made to work.
    Ever tried? Ever failed?
    Try again. Fail again. Fail better! - Beckett

    The marksman who hesitates is lost. Just take it for granted that you are going to hit and fire away before you have time to doubt the certainty of success. - Annie Oakley, 1894.

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    Thanks for your reply.

    I would still like to find out as to the machining specs for these limb bolts. When manufacturers make these they must have a machining specification and that is what I am trying to find out.

    I have written to Hoyt and Win Archery but so far had no reply.

    I contacted Border Bows with them being a reputable bower for their input but just got a nasty reply saying that if it wasn't anything related to their bows specifically they weren't interested.

  4. #4
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    I would suggest you ask Gtek on this forum....

  5. #5
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    How do I locate Gtek. Looked at the members list but can't seem to find this member.

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    OK, found Gtek

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