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

Latest topics

» Nut from a pool que ball?
by drawknife Sun Jun 17, 2018 5:29 am

» my composite crossbow lath project
by stuckinthemud1 Fri Jun 15, 2018 6:07 am

» Trouble with my Gafa
by drawknife Fri Jun 15, 2018 2:56 am

» Do all triggers Have claws - what types and claw or no claw
by globalmark Thu Jun 14, 2018 12:19 am

» For Sale: Masai Crossbow
by TonyU Mon Jun 11, 2018 1:15 pm

» Medieval composite bows
by juanjo Fri Jun 08, 2018 5:10 am

» yew and sinew prod help needed
by stuckinthemud1 Thu Jun 07, 2018 1:34 am

» Small gothic crossbow (with wooden lever)
by OrienM Fri Jun 01, 2018 10:35 am

» Binding on the stirrup
by Geezer Sat May 26, 2018 7:26 am

» horn inlay and veneer
by OrienM Thu May 24, 2018 8:44 pm

» Presentation
by c sitas Wed May 23, 2018 4:31 pm

» My latest crossbow
by drawknife Tue May 22, 2018 3:13 pm

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

» 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

» 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


    Bar stock trigger and nut

    Share

    davereap
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 10
    Join date : 2011-10-06
    Age : 69
    Location : Ashford, Kent, UK

    Bar stock trigger and nut

    Post by davereap on Wed Oct 26, 2011 7:07 am

    I am trying to replace the Nut and trigger mechanism with something as simple as possible..

    My idea is to use 5mm x 20mm flat aluminium bars , they should have a minimum of shaping, drilling to make them work.

    I have a minimum of metal working tools , but can manage to drill, file and cut, but not produce the more complicated triggers I have seen

    I've been designing on sketchup and have some rough ideas, but what are your thoughts





    be aware these are not finished drawings but are to show the idea... dave

    davereap
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 10
    Join date : 2011-10-06
    Age : 69
    Location : Ashford, Kent, UK

    Re: Bar stock trigger and nut

    Post by davereap on Thu Oct 27, 2011 10:21 am



    Ive made a wooden mockup, mostly its ok, the firing mechanism is fine but the "sprung on saftey" has to be held in the fire position to cock the mechanics.. no good as I havnt got three hands

    ANY IDEAS all I can think to use is a quick release catch of some kind to hold the safety at the fire/unsafe position..

    So I would have to cock it.. then manually engage the safety before I load up..
    avatar
    Todd the archer
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 581
    Join date : 2010-02-25
    Age : 56
    Location : sellersville,pa.

    Re: Bar stock trigger and nut

    Post by Todd the archer on Thu Oct 27, 2011 6:25 pm

    Overall I think you design will work, except maybe you could come up with a different saftey design.



    Here a discussion on saftey's

    http://thearbalistguild.forumotion.com/t431-trigger-safety-designs



    Todd

    davereap
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 10
    Join date : 2011-10-06
    Age : 69
    Location : Ashford, Kent, UK

    Re: Bar stock trigger and nut

    Post by davereap on Fri Oct 28, 2011 6:04 am

    Thanks I will have a look through there... The first safety idea is already gone and ive come up with a different solution, its still manual for safe, on and off, but it can be held unsafe for firing and cocking by a simple toggle...
    Ive also moved the safety to the rear in the body.... Its a step better, but not the automatic safety that I desire..

    The trigger mechanism works very well, Ive given each part mechanical advantages to make the firing esaier.. It doesnt take any force to trip the thing, but its not under any great strain so there is no friction.. But it is noticably easier/lighter than my jaguar crossbow's trigger..

    I do wish I'd made it in metal, as it seems to be good the first time..

    pic 1 cocked and safe



    pic 2 cocked and unsafe



    pic 3 ...fired .... in unsafe position which allows for cocking


    davereap
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 10
    Join date : 2011-10-06
    Age : 69
    Location : Ashford, Kent, UK

    Re: Bar stock trigger and nut

    Post by davereap on Sun Oct 30, 2011 2:17 am

    Clarification of the last pic..

    The trigger can be tripped by pushing the safety with your thumb against its spring loading, then squeezing the bar..

    By then engaging the toggle latch the safety can be kept forward and the mechanism cocked, the toggle is then released and the safety pops up. then the trigger mechanism is blocked from firing
    avatar
    Regerald
    Master Crossbowyer
    Master Crossbowyer

    Posts : 67
    Join date : 2009-11-30
    Age : 33
    Location : Finland

    Re: Bar stock trigger and nut

    Post by Regerald on Sun Oct 30, 2011 5:24 am

    Nice mech, will surely work. But in this case you have relatively large "nut", so you can face a problem that string is jumping over a bolt. Would be better to make this nut as light as you can, and in ideal even reduce its size..


    Last edited by Regerald on Sun Oct 30, 2011 5:25 am; edited 1 time in total (Reason for editing : tupo)

    davereap
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 10
    Join date : 2011-10-06
    Age : 69
    Location : Ashford, Kent, UK

    Re: Bar stock trigger and nut

    Post by davereap on Mon Oct 31, 2011 3:26 am

    yes thanks good points.. Its a rough work in progres, so ive a long way to go, and I am trying to get something simply/crudely made and different to work.. Unfortunately I no longer have workshop facilities so have only the minimum of tools.. machining is out of the question, simple hand tools only are available

    The mechanics are set so the nut is rotating at the level of the guide rail along the centre..as in the pic above it shows the front of the nut up a bit, it actually can rotate well into the body, past the guide rails, which are still to be fitted, but is then retrived by the elastic band, so the cocking part stands proud for when the string gets pulled back.

    I will also be fitting a guide over the bolt which hopefully will stop the string going over..and a spring to hold the bolt/arrow.. I will post more pics as I progress, there is a lot more to do..

    At the moment the Nut will take normal nocked arrows onto the string.. I have read that flat or slightly cupped ends are best, along with much thicker strings, time will tell.. Its just some ideas to try.. with a thick string and guides over and under the string should be stopped from jumping

    Ive been reading up and old setups dont have the full bolt length resting in a guide.. friction being a problem, they have the bolt's front fractionally raised, ususally the head doing the job.. However my shop bought ones dont do that.. so whats the best way..
    avatar
    Ivo
    Admin
    Admin

    Posts : 1041
    Join date : 2009-11-25
    Age : 30
    Location : NJ, USA

    Re: Bar stock trigger and nut

    Post by Ivo on Wed Nov 09, 2011 4:53 pm

    Can't believe I missed this. I do have a few suggestions...tried the stacked nut a few times with varying success. I'm not sure of what kind of bow you're building, but perhaps this will help a bit.





    Similar to what Regerald showed on here once. http://thearbalistguild.forumotion.com/t268-fantasy-style-crossbow

    And mounting it on the bow...this guy has a pretty cool solution. Smile

    AboMickey on Hidden Arrow/Dart Launcher wrote:

    Ok so I continued to work on this thingie, and now
    it's to a point where all you xiphoid enthusiasts out there can start
    drooling




    I think I'm gonna paint it like Liger Zero
    It
    has a problem though, It's really @$#!&* hard to load. I'm thinking
    of making some kind of rod that can push the string back
    But there is so little space for such things.
    The trigger works and thats all I have to be exited about for now.

    And don't sweat the hand tools... hand tools are cool, takes a bit longer, but gives you time to really think about what you're doing. Wink

    That's all I got time for now, but feel free to drop some thoughts/questions...I'm sure you won't be left hanging. Smile

    Ivo




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

    Sponsored content

    Re: Bar stock trigger and nut

    Post by Sponsored content


      Current date/time is Sat Jun 23, 2018 9:45 am