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    Pine Stock, Round Cams

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    Regerald
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    Pine Stock, Round Cams

    Post by Regerald on Sun Dec 06, 2009 1:09 pm

    First topic message reminder :

    A crossbow, made mainly out of garbage that i found. Stock was glued from 4 separate pieces of a pine lumber, limbs were made out of a steel leaf spring, suspension of a car. Here I'll post some pictures, but I'm sorry about quality.. Maybe I have to bye a new camera to post better pictures Smile







    Draw weight is about 130 lbs, weight is about 11lbs.. A main disadvantage of this crossbow is weight distribution. Actually, it's a common problem for all steel prodd crossbows, where bow is heavier than a stock. Hard to target it. And trigger system is a bit primitive, just a nut and trigger with a brass bearing. But in common, device works well.. I'm looking for a good place to test it at long distance, but here in the city it's a little bit difficult.
    avatar
    sairaj999
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    Re: Pine Stock, Round Cams

    Post by sairaj999 on Tue May 15, 2012 10:07 pm

    ferdinand wrote:
    sairaj999 wrote:hi ... how r u im big fan of crossbows .. but how do u cut spring steel i have many in my garage and many tool but i want to ask u how to cut it in shave without losing its spring abelitiy
    Only way to cut it is a grinding/cutting disc in a anglegrinder.
    I did it and works verry well.

    Nice build by the way!

    thx u very much

    chaz
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    Re: Pine Stock, Round Cams

    Post by chaz on Wed May 16, 2012 5:10 am

    Regerald,

    You evidently have a nice place to rummage. The build seems very well planned out and very well executed! Thanks for sharing. Did you build the trigger assembly? Did you build the sight mount?What was the source for the cams, or did you make them also? What is the length of the prod pieces? Did you use another compound crossbow as an example for the compounf assembly? The whole build is wonderful ! It would be worth the trip to the countryside to shoot the heck out of it!It appears youy must have access to quite a shop.

    Chaz
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    Ivo
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    Re: Pine Stock, Round Cams

    Post by Ivo on Wed May 16, 2012 6:22 pm

    Yeh, Regerald is a really cool guy.

    I mentioned this before, but there is actually another crossbow forum where Regerald and I originally hail from. Very Happy

    http://forum.arbalet.info/viewforum.php?f=1

    If you can manage reading Russian some way (via google translate/ etc.) you can get a glimpse of what our colleagues do across the pond.

    Not to steal the show here, chaz, your question stands.

    I'm just mentioning another resource is all. Very Happy

    Ivo




    * *
    ~ "I don't have any special talents. I'm only passionately curious."
    * * *
    ~ "All Genius is Simple"
    * *

    chaz
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    Re: Pine Stock, Round Cams

    Post by chaz on Thu May 17, 2012 5:43 am

    Ivo,

    Not a problem, however, my Russian and computer skills are both lacking. Maybe I'll figure out how to down( or up load) some pictures as I do my first build.

    Chaz
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    Ivo
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    Re: Pine Stock, Round Cams

    Post by Ivo on Thu May 17, 2012 6:17 pm

    If you ever need to translate anything, just hit up Google Translate.

    Like so... >>>Link

    And check out the Posting Pictures topic in the FAQ forum...and I can always help out if you need further assistance. Smile

    Ivo




    * *
    ~ "I don't have any special talents. I'm only passionately curious."
    * * *
    ~ "All Genius is Simple"
    * *

    chaz
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 290
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    Re: Pine Stock, Round Cams

    Post by chaz on Thu May 17, 2012 7:52 pm

    Ivo,

    Thanks

    Chaz
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    Regerald
    Master Crossbowyer
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    Re: Pine Stock, Round Cams

    Post by Regerald on Sun May 20, 2012 1:15 pm

    chaz wrote:Regerald,

    You evidently have a nice place to rummage. The build seems very well planned out and very well executed! Thanks for sharing. Did you build the trigger assembly? Did you build the sight mount?What was the source for the cams, or did you make them also? What is the length of the prod pieces? Did you use another compound crossbow as an example for the compounf assembly? The whole build is wonderful ! It would be worth the trip to the countryside to shoot the heck out of it!It appears youy must have access to quite a shop.

    Chaz

    Well, thanks, but it only seems to be well-planned. Many parts of a crossbow I had to remake, like the trigger mech, which at first was way too heavy. At present it looks like this:

    Also cams were changed. The whole composition of a crossbow doesn't allow excentric cams to realize all it's potential (draw lenght is too short), so I changed it to a more primitive, but also lighter, circular "pulley".

    Those were made on a lathe (I don't possess one, had to "borrow") Got slight rise in velocity, and shooting sound became softer with a synthetic string (made of braided fishing line, possibly dyneema).
    Actually, polyfilament fishing line works wery well in a crossbow string, so if you have some, no need to buy any special material..

    Lenght of a one limb is 33cm or something about 13 inches. Every part was made by myself, altough for pulleys and nut in trigger mech I had to borrow "heavy machinery" as lathe and miller..

    chaz
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 290
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    Re: Pine Stock, Round Cams

    Post by chaz on Sun May 20, 2012 6:19 pm

    Regerald,

    Thanks for the response and input to your build. Your trigger assembly is very nice and most of all one can appreciate the simplicity, however it is obvious you are quite talented with the lathe and milling processes, you are really sharp. I have wondered about the possibility of the woven string( that foundation workers use when setting forms for foundations) of course looped several times and then wrapped with string to make the bow string, however polyfilament fishing line idea is worth consideration. I'm not ready to tackle the compound thing, but I'm about to start my build and intend to try my hand at every aspect and of course, like yourself, I have aquired a variety of materials . No one should hold their breath in anticipation, this is going to take a while.

    Thanks again

    Chaz
    avatar
    sairaj999
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 19
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    Re: Pine Stock, Round Cams

    Post by sairaj999 on Sun May 20, 2012 7:47 pm

    Regerald wrote:
    chaz wrote:Regerald,

    You evidently have a nice place to rummage. The build seems very well planned out and very well executed! Thanks for sharing. Did you build the trigger assembly? Did you build the sight mount?What was the source for the cams, or did you make them also? What is the length of the prod pieces? Did you use another compound crossbow as an example for the compounf assembly? The whole build is wonderful ! It would be worth the trip to the countryside to shoot the heck out of it!It appears youy must have access to quite a shop.

    Chaz

    Well, thanks, but it only seems to be well-planned. Many parts of a crossbow I had to remake, like the trigger mech, which at first was way too heavy. At present it looks like this:

    Also cams were changed. The whole composition of a crossbow doesn't allow excentric cams to realize all it's potential (draw lenght is too short), so I changed it to a more primitive, but also lighter, circular "pulley".

    Those were made on a lathe (I don't possess one, had to "borrow") Got slight rise in velocity, and shooting sound became softer with a synthetic string (made of braided fishing line, possibly dyneema).
    Actually, polyfilament fishing line works wery well in a crossbow string, so if you have some, no need to buy any special material..

    Lenght of a one limb is 33cm or something about 13 inches. Every part was made by myself, altough for pulleys and nut in trigger mech I had to borrow "heavy machinery" as lathe and miller..
    how u cut ur prod and i want to make fiberglass prod did u use wood pls make one how to make i want to make one
    Jam
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    Regerald
    Master Crossbowyer
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    Re: Pine Stock, Round Cams

    Post by Regerald on Mon May 21, 2012 5:51 am

    sairaj999 wrote:how u cut ur prod and i want to make fiberglass prod did u use wood pls make one how to make i want to make one
    To cut a steel prod you'll need an angle grinder with a thin cutting disk. Wery dusty and noisy work, and you also have to cool down you prod with a water constantly, otherwise it will lose it's elastic properties.

    Main idea how to work with a fiberglass you'll find in this topic:
    http://thearbalistguild.forumotion.com/t12-pressing-all-fiberglass-crossbow-limbs
    I've also presented there my way of pressing fiberglass prod.
    avatar
    Regerald
    Master Crossbowyer
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    Re: Pine Stock, Round Cams

    Post by Regerald on Mon May 21, 2012 6:04 am

    chaz wrote:
    I have wondered about the possibility of the woven string( that foundation workers use when setting forms for foundations) of course looped several times and then wrapped with string to make the bow string, however polyfilament fishing line idea is worth consideration. I'm not ready to tackle the compound thing, but I'm about to start my build and intend to try my hand at every aspect and of course, like yourself, I have aquired a variety of materials . No one should hold their breath in anticipation, this is going to take a while.

    Thanks again

    Chaz
    I would reject the idea of that string, it stretches too much. At list one that I've seen there. Of cause, it can still be used as a bastard string or temporary string for a tillering, but shooting performance wouldn't be impressive.
    I do really appreciate the simplicity, that's why I think I wont build any other compound thing in near future. Along with simplicity we usually get reliability, which for me is more important than peak performance.
    So, very good luck with your project, I'll wait to see it.

    t.Regerald

    chaz
    Workshop Savvy

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    Workshop SavvyDid you see my tool collection?

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    Re: Pine Stock, Round Cams

    Post by chaz on Mon May 21, 2012 1:58 pm

    Thanks for the input. Your first pictures show what appears to be wire cable, did that not workout too well for a string ?

    Chaz
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    Regerald
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    Re: Pine Stock, Round Cams

    Post by Regerald on Tue May 22, 2012 4:28 am

    chaz wrote:Thanks for the input. Your first pictures show what appears to be wire cable, did that not workout too well for a string ?

    Chaz
    Worked well for some time, but stretched in a longer period..
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    ferdinand
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    Re: Pine Stock, Round Cams

    Post by ferdinand on Tue May 22, 2012 6:32 am

    Regerald wrote:
    chaz wrote:
    I have wondered about the possibility of the woven string( that foundation workers use when setting forms for foundations) of course looped several times and then wrapped with string to make the bow string, however polyfilament fishing line idea is worth consideration. I'm not ready to tackle the compound thing, but I'm about to start my build and intend to try my hand at every aspect and of course, like yourself, I have aquired a variety of materials . No one should hold their breath in anticipation, this is going to take a while.

    Thanks again

    Chaz
    I would reject the idea of that string, it stretches too much. At list one that I've seen there. Of cause, it can still be used as a bastard string or temporary string for a tillering, but shooting performance wouldn't be impressive.
    I do really appreciate the simplicity, that's why I think I wont build any other compound thing in near future. Along with simplicity we usually get reliability, which for me is more important than peak performance.
    So, very good luck with your project, I'll wait to see it.

    t.Regerald

    I can confirm the string stretching!
    Made a string for my recurvebow using 6 strings.
    Made 2 strings of 3 swisted together and twisted those 2 together to make 1
    I believe it is called a Flemmish bow string, at least here in europe it is.
    But anyway, it did strech a lot, had to shorten it almost an inch!
    But must say now i did it is shooting nice!
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    Regerald
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    Re: Pine Stock, Round Cams

    Post by Regerald on Mon Jan 14, 2013 1:27 am

    How sad it seems that all the pictures from the first topic are dissappeared. Sorry, I will reload them later as soon as I found on which pc they are stored Smile

    chaz
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    Re: Pine Stock, Round Cams

    Post by chaz on Mon Jan 14, 2013 9:09 am

    Regerald,

    The trigger and nut design has a nice configuration and seems to lend itself to a simple safety and I like the built-in stop for the nut. I'm currently working through some design ideas. Thanks for bringing the post back.

    Chaz

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