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

Latest topics

» Trouble with my Gafa
by Geezer Today at 12:31 pm

» horn inlay and veneer
by stuckinthemud1 Today at 12:05 pm

» Presentation
by c sitas Yesterday at 4:31 pm

» My latest crossbow
by drawknife Tue May 22, 2018 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

» 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

» 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


    Accuracy of the Claplock versus Rollernut

    Share
    avatar
    Basilisk120
    Moderator
    Moderator

    Posts : 548
    Join date : 2010-03-01
    Age : 39
    Location : Arizona

    Accuracy of the Claplock versus Rollernut

    Post by Basilisk120 on Tue Feb 14, 2017 3:52 pm

    Finally getting around to making another crossbow,  I have the prod ready to go and the wood for the body all selected but trying to figure out if I want to go with a roller not or a claplock.  It comes down to inherent accuracy is one system more accurate than the other?  I like the Claplock because it is a little faster to lock up, don't have to roll the nut back in place, but the string is always in contact with the bolt with the roller nut, which seems a bit more reliable for accuracy.  Am I over thinking this or is there a difference?



    Something Something Dark Side

    c sitas
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 464
    Join date : 2012-11-24

    Re: Accuracy of the Claplock versus Rollernut

    Post by c sitas on Tue Feb 14, 2017 8:52 pm

    Hello Bas. Can't say much here about which is better. I can tell you that to my knowledge there are no such commercial triggers in use. I mean as the clap lock. All use the roller in one form or another.Could be some thing to do with the anti dry fire mechs . They all use that now. A clap lock might present a challenge there. A roller is simple to do.Just my thought here, the more contact you keep between the string and the arrow the better it is.
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 1011
    Join date : 2010-01-12
    Age : 70
    Location : Austin, Texas, USA

    Re: Accuracy of the Claplock versus Rollernut

    Post by Geezer on Thu Feb 16, 2017 6:42 am

    Geezer here, concerning the claplock vs. roller-nut.  Personally I prefer the roller-nut: it's quieter, a bit more efficient, and produces less wear on bowstrings and bolts Mostly that's because the string is moving when it hits the bolt.  So there's a 'pop' representing a loss of energy.  That's my preference.  But in fact, there are lots of very good German light hunting and target bows made with the more sophisticated clap lock. (string slopes down to be held by a claw) Given the large numbers of extant claw/claplocks, I can't believe they were generally inferior to rollers.  Pushpin/notch claplocks are much simpler still.  Their major advantage is ultra-simplicity and very quick loading. They're cheap too. Though I make pushpin/notch bows (Skane bows) in my shop for sale, I don't personally like them very much. But boy, they build up fast.  I can easily turn out a Skane bow every day.
    As for notch/claw claplocks, Garvin's Slobows has the parts for sale.  You should be able to make one up pretty easily.  Don't let me stop you trying them. Geezer.
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 1011
    Join date : 2010-01-12
    Age : 70
    Location : Austin, Texas, USA

    Re: Accuracy of the Claplock versus Rollernut

    Post by Geezer on Thu Feb 16, 2017 6:45 am

    Hmmm: I don't think I was clear there.  The string is moving when it hits the bolt in a Claplock or a Skane bow (pushpin/notch) The string starts against the bolt in a roller lock (or should if you're doing it right.) roller locks have less misfires and accelerate the bolt more smoothly, for less wear on bolt-butt and bowstring.  Geezer.
    avatar
    Basilisk120
    Moderator
    Moderator

    Posts : 548
    Join date : 2010-03-01
    Age : 39
    Location : Arizona

    Re: Accuracy of the Claplock versus Rollernut

    Post by Basilisk120 on Sat Feb 18, 2017 9:47 pm

    Thanks for the info.  I think I will stick with the simple roller nut for this one and save the complicated build for the next crossbow.



    Something Something Dark Side
    avatar
    FrenckBrambo
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 14
    Join date : 2017-01-01
    Age : 57
    Location : Groningen, Netherlands

    Same question, just a roller nut for a claplock

    Post by FrenckBrambo on Tue Feb 28, 2017 2:51 pm

    I just wanted to post the same question Bas;
    before I start my RDT project, I upraded the bow that I made when I was 17. I changed the roller-nut mechanism for a (self-invented) claplock, because the lever that holds the roller-nut on the botttom wore down and it started to dry-fire. It was a lot of work to get it right, because when cocked, the lock has to be just above the rail.
    So I made a new claplock-mechanism:

    [img:9d7a]https://s20.postimg.org/ktd75wdll/IMG_0993[364].jpg[/img:9d7a]



    It works fine, but it makes a lot of noise. When shooting it sounds more like a gun.. Besides that the serving on the string wear down quickly I guess, like Geezer says.
    Two things to notice when you make a claplock I think: the front end of the lock that holds back the string has to have an angle, and must be a bit rounded, and the rotation-point must not be to low (some mm above the top of the string). I made it a bit to low.

    I developed a trigger mech for my RDT project:


    But now I am planning to change this in a lock that rotates under the string.. More to come.

    Sponsored content

    Re: Accuracy of the Claplock versus Rollernut

    Post by Sponsored content


      Current date/time is Thu May 24, 2018 7:30 pm