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

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3 posters

    Delrin Notch Lock

    kenh
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    kenh
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    • Post n°1

    Delrin Notch Lock Empty Delrin Notch Lock

    Post by kenh Thu Aug 30, 2012 9:21 am

    Here's an idea... Take a block of Delrin and inlet it into the tiller. Cut the Notch for a notch Lock into the Delrin and drill for the Push pin. Then use a Delrin rod as the Push Rod. Should seriously reduce the friction, I should think.

    Advantages? Drawbacks?
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    Geezer
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    • Post n°2

    Delrin Notch Lock Empty Re: Delrin Notch Lock

    Post by Geezer Thu Aug 30, 2012 10:25 am

    Facing the front of the notch with Delrin should help reduce string wear, as long as you can get the Delrin to stay in place. You'll probably have to use counter-sunk pins or screws for that, since the durned stuff won't glue to anything natural!
    Good idea, anyhow. I have used bone reinforces to notch-locks... if reasonably well polished, it offers a reduction in friction and you can even glue it, but Delrin should be lower-friction still. Try it, you may like it. Geezer
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    Basilisk120
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    • Post n°3

    Delrin Notch Lock Empty Re: Delrin Notch Lock

    Post by Basilisk120 Thu Aug 30, 2012 10:42 am

    Sounds like an interesting idea. I guess the only thing I would change would be to use a highly polished metal push rod, either brass or Stainless steel. That should slide nicely against the Delrin while not bending.



    A delrin push rod would have to be fairly stout but might work.
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    kenh
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    • Post n°4

    Delrin Notch Lock Empty Re: Delrin Notch Lock

    Post by kenh Tue Sep 04, 2012 6:51 am

    OK - part 2 of this topic.

    Is there an optimum diameter for the push rod in relation to the width of stock, diameter of bolt or any other factor?

    Any advantage/disadvantage to topping the push rod with a curved T shape that matches the curve of the forward face of the notch?
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    • Post n°5

    Delrin Notch Lock Empty Re: Delrin Notch Lock

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