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Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

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» 12th Century Chinese Crossbow Chronographed
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» [solved]Skane/Lillohus crossbow thread
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3 posters

    stringin the nut question

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    phuphuphnik
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    stringin the nut question Empty stringin the nut question

    Post by phuphuphnik Mon Mar 24, 2014 7:19 pm

    Hoe much should the string be in the nut? What I mean is, how much should the nut be over the top of the string? I don't want it slipping over the top, although I don't think there is much chance it is a bit close, but still fully covered. it is a delrin nut at 123# pull. The prod and string are both alchem.
    cheers,
    chriso
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    Hermit
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    stringin the nut question Empty Re: stringin the nut question

    Post by Hermit Tue Mar 25, 2014 10:04 am

    I am not the most experienced builder here,but my opinion is backed by some experience.IMHO,the height of the string holding surface of the nut should be at least the height of the string.I have found that a radius on the holding surface of the nut also helps to keep the string secure.This radius does not have to be the diameter of the string,it can be much larger.A small radius on the sides of the nut holding surface will help reduce wear on the string.  
                                                                Hermit.
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    stringin the nut question Empty Re: stringin the nut question

    Post by Gnome Sat Mar 29, 2014 6:57 am

    I guess I never thought of it quite that way, for me the depth of the cut for the string was always determined by the depth of the nut socket into the stock, since I'd then cut the notch to hold the string so that it rests correctly over the bolt track. This has more to do with the curve on the back side of the "teeth" than the depth of the cut, but of course you don't want to weaken the nut by filing too much material away unnecessarily.
    This unit is pretty representative of the roller nuts I've made, which have all performed satisfactorily.
    Come to think of it, that's about the only component type I've never managed to royally screw up!
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    stringin the nut question Empty Re: stringin the nut question

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