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

Latest topics

» Trouble with my Gafa
by msalazar2310 Yesterday at 6:27 pm

» My latest crossbow
by drawknife Yesterday at 3:13 pm

» Medieval composite bows
by Dark Factor Mon May 21, 2018 12:46 pm

» The Arbalist Guild - Around the World
by stuckinthemud1 Sun May 20, 2018 5:32 am

» Presentation
by juanjo Sun May 20, 2018 2:13 am

» angles and rivets
by Geezer Fri May 18, 2018 1:16 pm

» morticed nut blocks
by Dark Factor Wed May 16, 2018 12:02 pm

» Crossbow triggers
by Croftage Mon May 14, 2018 1:41 pm

» horn inlay and veneer
by OrienM Sat May 12, 2018 8:59 am

» yew and sinew prod help needed
by OrienM Sat May 12, 2018 8:29 am

» Cocking lever
by c sitas Fri May 11, 2018 8:09 am

» Late roman crossbow
by Dark Factor Wed May 09, 2018 10:27 am

» For Sale: Masai Crossbow
by TonyU Tue May 08, 2018 6:35 am

» Powermaster Madness
by Archer46176 Sun May 06, 2018 8:08 pm

» Fast loading crossbow
by septua Mon Apr 23, 2018 9:22 am

» lashing a glass prod in raw hide?
by kenh Sun Apr 22, 2018 7:00 am

» Balestra Veloce / Leonardo DaVinci
by msalazar2310 Fri Apr 20, 2018 10:37 am

» Goats Foot Lever
by Geezer Wed Apr 18, 2018 12:42 pm

» Hickory and Ipe 180lb flatbow
by actionbow Mon Apr 16, 2018 1:56 pm

» goat foot questions.
by Geezer Sat Apr 14, 2018 10:26 am

» Prod questions....
by Geezer Mon Apr 09, 2018 10:58 pm

» convert compound cross bow to ball shooter
by kenh Sun Apr 08, 2018 7:34 am

» Skane Lockbow replica (and making of)
by actionbow Wed Apr 04, 2018 11:10 am

» String traps bolt to tiller when loosed
by Geezer Tue Mar 27, 2018 9:36 am

» How close to original would you go
by jamesjohnson Thu Mar 22, 2018 4:36 am


    hey all from Illinois

    Share

    edstuff
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 74
    Join date : 2014-12-16

    hey all from Illinois

    Post by edstuff on Tue Dec 16, 2014 9:03 pm

    Found this forum while searching handmade medieval crossbows.  I'd like to try my hand at one but have some questions. The first one being if it would be possible to make a crossbow prod from a piece of burned out plate.  I always see people take barstock or some kind of steel and then form it to the shape but what if I drafted in CAD the shape and then had someone waterjet or even flame cut the shape out?  It would be plain A36 steel say 1/2-3/4 inch thickness and I'd make the prod 1/4" thick all around.  
    Does anyone see any possible issues?  I may try it out with one of my shop guys flame cutting it and see how it goes.

    c sitas
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 462
    Join date : 2012-11-24

    hi to Ill.

    Post by c sitas on Tue Dec 16, 2014 9:44 pm

    You can't make a prod that way . You can't use plain steel, it would have to be "high carbon steel. Something that would be heat treatable.Regular steel like your talking about would just bend and stay bent. It would not make a "spring" . I'm not smart enough to tell you what number steel you would need, but I'm sure there are those here that can.
    avatar
    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 765
    Join date : 2012-08-03
    Age : 69
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Re: hey all from Illinois

    Post by kenh on Wed Dec 17, 2014 6:56 am

    You could cut the prod out with a waterjet, surely.  But then the steel would have to be spring tempered, otherwise it's just a 'hunk o steel' not a spring.

    c sitas
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 462
    Join date : 2012-11-24

    hey all

    Post by c sitas on Wed Dec 17, 2014 8:26 am

    You are missing the point here. you can cut high carbon steel with a hack saw BUT, it has to be high carbon steel. You can't make high carbon steel out of a piece soft flat stock. Also all shaping and work has to be done "Before it's hardened ". The prices they chg. for a prod,-- fully warrantied, with a high performance, and looking great are nothing compared to making something that "could bat your brains,or your friends brains all over the floor. I would not attempt it. Make all else, it's what this forum is all about.

    Hermit
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 245
    Join date : 2013-09-10

    Re: hey all from Illinois

    Post by Hermit on Wed Dec 17, 2014 8:33 am

    c sitas is absolutely right,you obviously have access to some high level metalworking technology.Where you seem to be deficient,is in the metallurgy department.Spring steel is  a high carbon steel,and most likely has other additives,ordinary mild steel won't work.
                                                          Unless you have access to a skilled blacksmith with hardening and tempering experience,or a commercial hardening and tempering facility,or intend to adapt and use a vehicle leaf spring,I would forget about trying to make a metal prod,there are companies that sell them.
                                                                   Hermit.
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 1010
    Join date : 2010-01-12
    Age : 70
    Location : Austin, Texas, USA

    Re: hey all from Illinois

    Post by Geezer on Wed Dec 17, 2014 8:50 am

    Considering all the work that goes into making a safe, workable steel prod, it's much more economical and efficient to simply buy a prod from a professional shop.
    From my point of view, I can see only two reasons to make your own: Either you can't purchase the type of prod you want or you simply want the experience and satisfaction of doing it yourself.  Note that I don't include cost in the reasons to build your own.  Because by the time you've got your steel and all your tools together and spend several hot, sweaty days fuming and cursing over the project, a 75 dollar prod from Slowbows or Darkwood is going to look mighty cheap.
    Geezer.

    phuphuphnik
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 147
    Join date : 2013-12-02
    Location : The wastes West of Chicago

    Re: hey all from Illinois

    Post by phuphuphnik on Wed Dec 17, 2014 11:25 am

    Hello from Il, as well.
    There are tempering places in the western 'burbs that will toss a prod in with a job, and you can get the 5xxx steel from Admiral in Alsip, but when I was looking to make 3 prods for the 7th grade stonebow project, the cost was too high, much more than the Slobow prods. My advice to another novice is to use a known prod, make a bow that functions safely then think about making the prod. It is nice to have at least one known variable the first time out. Having made flintlock springs, I can tell you it is not as easy as it seems. Now take the 3" spring I made and multiply the length by 10. That 24-32 inch span has to be heated and cooled evenly, or it could (read 50/50 chance) break and hurt you pretty bad. Not to dissuade you, but realize the potential energy locked into that steel. I find it easier to work on the lock and stock and worry how that works than the prod.

    A final note, you might get the feeling that we are jumping on you pretty hard about the risks and value of making a prod. Bear in mind we don't want anyone getting hurt. I was sent a strong "don't you effing dare" message when I was designing pellet shooting bows. I took it to heart, and still have all my eyes because of it. Use the collected experience here as a guide. If we seem gruff with safety items, someone probably got hurt in a similar way, and doesn't want it to happen to another.

    edstuff
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 74
    Join date : 2014-12-16

    Re: hey all from Illinois

    Post by edstuff on Wed Dec 17, 2014 1:45 pm

    Ha ha I'm pretty thick skinned so I don't feel jumped on.  I was actually debating a prod from slowbos but figured I'd ask around.  I recently got into crossbows and I'm a tinkerer so naturally want to make one for myself just to have something I made.  I eventually want to make a self cocking full size crossbow similar to the Barnett Commando.  I'm sure I'll ask a lot more questions before I ever get started.
    Thanks
    Ed

    c sitas
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 462
    Join date : 2012-11-24

    Re: hey all from Illinois

    Post by c sitas on Wed Dec 17, 2014 2:10 pm

    Hey Ed; I found another spot you should check out for prods. Digitarc.com. They advertise on the right hand panel. Their stuff looks great and the prices aren't that bad either.

    edstuff
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 74
    Join date : 2014-12-16

    Re: hey all from Illinois

    Post by edstuff on Thu Dec 18, 2014 11:25 am

    Does anyone know where to get a fiberglass prod with a draw of 100# or less?
    I know there are some British websites that sell them but I was wondering if there are any based in the US.

    phuphuphnik
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 147
    Join date : 2013-12-02
    Location : The wastes West of Chicago

    Re: hey all from Illinois

    Post by phuphuphnik on Thu Dec 18, 2014 11:32 am

    http://www.thecrossbowstore.com/ has them. I used the little 80# ones for the stonebows. They have an ebay store too. The ones I used are little, about 12" or so if memory serves I'm not at home. If you don't mind MINI CROSS BOW written along the front you're all set for about ten bucks. They have other sizes too. The minis pack a good punch and took a fair bit of abuse.


    Sponsored content

    Re: hey all from Illinois

    Post by Sponsored content


      Current date/time is Wed May 23, 2018 8:33 am