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    Need some advices for prod material

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    Daniel Levesque
    Techno Weeny

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    Techno WeenyLets put a laser on it!!!

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    Need some advices for prod material

    Post by Daniel Levesque on Thu Jan 12, 2017 8:01 am

    Hello there,

    I'd like to take a try on a crossbow steel prod. I've seen this kind of leaf spring for a small trailer on amazon

    https://www.amazon.ca/Motorhome-Trailer-Axle-Springs-Pounds/dp/B007HRIYRA/ref=sr_1_cc_2?s=aps&ie=UTF8&qid=1484232022&sr=1-2-catcorr&keywords=leaf+spring+trailer

    Do you think I might get a decent draw weight ?

    Do you think it might be worth the try ? Of course, I'll try to find a used one in a scrap yard but in Quebec where I live, harsh winters tends to be a nightmare to stuff let in the open.

    Also, how can I compensate for the hole that would be in the middle of the spring leaf ?

    Thanks again and good day to you all.

    c sitas
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    Re: Need some advices for prod material

    Post by c sitas on Thu Jan 12, 2017 8:39 am

    Dan; do  some research on making the prod. I know there are articles that tell the complete how and why of making one.To work proper there is a special way it is cut. Just google it. Most guys cut them out with a small angle grinder.  These smaller trailer springs are pretty stout, don't underestimate them.The only thing with the junk yard is that type of spring has just about vanished. Nothing made for vehicles  any more, or find a really old yard. You'll have to stick with the trailers. The ones I've seen used never worried about the hole. As long as it is there I would incorperate two pieces of metal to brace it up some. One in front of and one behind.Use it to help fasten on.  DO NOT try to weld it.
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    Basilisk120
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    Re: Need some advices for prod material

    Post by Basilisk120 on Fri Feb 10, 2017 6:22 pm

    buy a new one if you want to go down this route. used ones often have micro cracks from wear and the elements. road salt is murder on these things. be prepared for a lot of work as these will be quite stout. also remember to keep it cool during the cutting



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    c sitas
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    Re: Need some advices for prod material

    Post by c sitas on Fri Feb 10, 2017 6:58 pm

    Ya Base, I totally agree with you . You can use angle grinders and such. You need the best eye protection in the world.One tiny spec in your eye and, you could buy a half a dozen factory made one's , for what the trip will cost you. I'm an older bodyman and I do know what I'm talking about.I made one , just to say I did it, but never again . It' s too labor intensive for what you get. I'd rather use glass. It's way lighter ,and I think faster.
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    Anatine Duo
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    Re: Need some advices for prod material

    Post by Anatine Duo on Fri Feb 10, 2017 7:53 pm

    Check Princess Auto too, they often have leaf springs on sale for cheap.

    I once made a longbow with springs from a snowmobile- the old kind had leaf spring fronts... no tapers... insane handshock!

    I would recommend aggressive width tapering, and extra thin cutting wheels (3/32 max), and a fire extinguisher (lots of sparks)

    c sitas
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    Re: Need some advices for prod material

    Post by c sitas on Sat Feb 11, 2017 7:21 am

    Anatine , If you clamp a good straight edge on, nice and tight, use the thin disc like you say, it goes right along. I bought a new thing from Dremel of all people. It's like an angle grinder only it has skill saw type handling. Has a small table to help guide you.When you mention hand shock, that would've been like running an old Harley.That was an adventure.

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