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

Latest topics

» Medieval Crossbow Replica
by bartek Wed Dec 07, 2016 1:24 pm

» Prod construction
by actionbow Wed Dec 07, 2016 1:10 pm

» Hello from MD
by bigcountry_ky Mon Dec 05, 2016 7:40 am

» How to make a miniature medieval crossbow
by El Zurdo Sun Dec 04, 2016 3:31 am

» A real miniature crossbow
by El Zurdo Wed Nov 30, 2016 11:19 am

» Intesting Mechanical Bow can pre-cocking and locking
by stm2010 Sun Nov 27, 2016 10:29 pm

» Invitation
by Vee Sat Nov 26, 2016 11:42 am

» Chu Ko Nu (Zhu ge nu) chinese repeating crossbow making process from china
by El Zurdo Fri Nov 25, 2016 2:51 pm

» Miniature medieval crossbow crafts
by El Zurdo Fri Nov 25, 2016 9:10 am

» Why use a Crossbow?
by Xamllew Mon Nov 21, 2016 8:49 pm

» Minimum bolt weight steel prod
by Armymedic Fri Nov 18, 2016 5:01 pm

» where or how to ask a question
by WINCAR Fri Nov 18, 2016 1:51 pm

» roller nut difficulties
by Gnome Fri Nov 18, 2016 9:13 am

» The serious build
by hullutiedemies Tue Oct 25, 2016 3:35 am

» Hello from arkansas
by Onager Lovac Tue Oct 18, 2016 8:06 pm

» Wham O Powermaster
by Onager Lovac Tue Oct 18, 2016 8:05 pm

» Folding Stock Bullet-bow Project
by Xamllew Wed Oct 12, 2016 6:23 pm

» New member here!
by Xamllew Tue Oct 11, 2016 6:36 am

» Finnish Crossbow Forum
by hullutiedemies Fri Oct 07, 2016 6:54 am

» Ordo pro balistari
by John Edgerton Mon Sep 26, 2016 1:24 pm

» CNC Improved Chinese Trigger Xbow- Gnome style
by jaeger22 Tue Sep 20, 2016 1:12 pm

» xbow build.. trying to finish..where does the time go
by Onager Lovac Wed Sep 14, 2016 3:30 pm

» An afternoon at the range
by Gnome Sun Sep 04, 2016 10:00 am

» I am back with new project
by stm2010 Tue Aug 30, 2016 2:35 am

» European medieval an renaissance archery contests and target
by Lightly Sun Aug 28, 2016 4:08 pm


    Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Share

    wdh1974
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 14
    Join date : 2011-07-21

    Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by wdh1974 on Tue Aug 12, 2014 9:05 am

    whats the poundage on a clap lock and roller nutt?

    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 882
    Join date : 2010-01-12
    Age : 68
    Location : Austin, Texas, USA

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by Geezer on Tue Aug 12, 2014 9:21 am

    Geezer here, picking up the gauntlett:  Pounds force on a claplock?  I have no idea, having never built one, but looking at bows that employ claplock, I would say 200-300 lb. should be workable, given a properly made 'hand' and bowstring.
    For roller-locks, it depends on how they're built.  I make a lot of lightweight crossbows @ 70 lb draw. For those I use a decent hardwood for the stock and a simple Delrin roller, with a mild steel (allthread) sear for the trigger to work against.   They work out fine.  For customers who want much over 100 lb. draw, I usually reinforce the edges of the nut-socket with slabs of moose-horn... occasionally axis stag horn. If the slabs are put in correctly, they'll hold up indefinitely... occasionally you chip an edge, but generally speaking they work fine up to my limits of @ 200 lb. You see lots of horn/bone reinforces on medieval bows up to @ 1000 lb. draw.  Delrin rollers will work perfectly well on a 200 lb. bow, but I don't think I would put one on a 300 lb. bow.  The lugs might fail.  The few bows I have built over 200 got moose-horn rollers.  Very strong medieval bows... say anything over 500 lb. or so, often got a couple of steel pins driven through the lugs, down into the body of the roller.  I've done that with 1/8 or 3/16 in. steel rod, epoxied in place and it worked fine.  If you wanna know how much power you can use with a roller-lock, there are big siege bows that probably draw 1500 lb. with a 10 inch power stroke... there's a nice one in the Kunsthistorisches Museum in Vienna.  It has a bone roller @ 2 inches in diameter and the same in width.  The socket is undoubtedly lined with bone, and the lockplates look like cow-horn.  Remarkably, for such a strong bow, it has an old-fashioned single-axle trigger.  That suggests a lot of trigger pressure for release, but then again it IS really long, so maybe it's not too much work.  Does that help?  Geezer.

    Nick D
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 25
    Join date : 2014-08-04
    Location : Michigan

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by Nick D on Tue Aug 12, 2014 10:30 am

    Geezer wrote:Remarkably, for such a strong bow, it has an old-fashioned single-axle trigger.  That suggests a lot of trigger pressure for release, but then again it IS really long, so maybe it's not too much work. 

    That's interesting.  My brother wants to work up to a heavy bow, around 1200lbs or so, and I've been thinking of a two-axle trigger for heavier bows that doesn't require strings or such to lock.  Even with heat treated sears wouldn't a single-axle trigger on a 1500# bow wear out pretty fast?

    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 672
    Join date : 2012-08-03
    Age : 68
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by kenh on Tue Aug 12, 2014 11:21 am

    Sure it'll wear. Nobody said such a setup had the half-life of plutonium.  Back in the Olde Daye I don't believe they though in terms of weapon longevity the way we do.

    OrienM
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 64
    Join date : 2014-08-01
    Age : 40
    Location : New Mexico, USA

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by OrienM on Tue Aug 12, 2014 12:45 pm

    The old-style, riveted-in wedge sears don't appear to be replaceable, either, unlike the threaded-in, modern type. Would a crossbowman back in the day just expect to replace the entire nut every so often? It seems like an easier option than reshaping the ticker end.

    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 882
    Join date : 2010-01-12
    Age : 68
    Location : Austin, Texas, USA

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by Geezer on Tue Aug 12, 2014 12:50 pm

    Actually, given a riveted-in wedge sear and a riveted in tickler-trigger, I figure the trigger would be easier to remove and hammer square on an anvil, then fit back in the stock.  But in fact, if you can get the rivet out of the trigger, you can probably get it out of the nut as well, in which place one can rework that surface or remove it.  There's a worse wear-problem: a tickler-drag groove that forms around the circumference of the nut. That, plus sear-wear might eventually require replacement of the nut.  Of course when you consider some bows had no nussfaden or pivot-pin through the nut, (Western bows in particular) it probably wasn't uncommon to have them fall out.  So prudent archers probably carried a spare anyhow.  Geezer.

    wdh1974
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 14
    Join date : 2011-07-21

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by wdh1974 on Tue Aug 12, 2014 9:49 pm

    Oh wow sorry guys, great information but i wasnt clear lol....i mean what the trigger pull on a clap lock and roller nutt, aka is it for instance 3 pounds to break the trigger and fire the shot? my bad  Rolling Eyes  Rolling Eyes  Rolling Eyes  Rolling Eyes

    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 672
    Join date : 2012-08-03
    Age : 68
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by kenh on Wed Aug 13, 2014 6:54 am

    Almost no one thinks in terms of pounds of trigger pull around here.  The pull on a single axle roller nut lock is going to depend on the geometry of the roller nut axle and the tickler axle, plus the length of the tickler arm.

    Clap lock?  I don't know if anyone here has built one of the Slobows locks. 

    In either case, more than 2 or 3 pounds, that's for sure.  We're not talking match grade rifle/pistol trigger pulls until you start building your own multi-axle actions with set triggers and such.

    wdh1974
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 14
    Join date : 2011-07-21

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by wdh1974 on Wed Aug 13, 2014 9:53 am

    Oh ok thanks, wasnt sure Smile

    OrienM
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 64
    Join date : 2014-08-01
    Age : 40
    Location : New Mexico, USA

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by OrienM on Wed Aug 13, 2014 10:16 am

    I find I really like a nice, light trigger pull  Very Happy . I know you're asking about the Slobows locks specifically, so this is (once again tongue ) off-topic, but...my last build used a trigger like THIS (as in Ivo's post, #17...a "transfer bar" trigger, I guess? ) and the pull ended up pretty reasonable. I suspect by refining the lever arm lengths and so on, one could get a very sweet trigger pull out of this design.

    Oh and thanks, Geezer, for the info...very interesting. I like thinking about day to day maintenance as a design aspect. Makes sense, I suspect I could get a tickler rivet out without a ton of damage, whereas I might potentially break the nut in half.

    Todd the archer
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 581
    Join date : 2010-02-25
    Age : 54
    Location : sellersville,pa.

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by Todd the archer on Wed Aug 13, 2014 2:39 pm

    I have built a clap lock of my own design and incorporated a set trigger. Have to say you really can't get any better than that. Although I think the "lock time" is a little longer due to the set trigger hammer swing time as opposed to a directly activated release.

    Todd

    Sponsored content

    Re: Slowbows, Clap lock trigger, how many pounds pull are they, and whats the pounds on a roller nutt?

    Post by Sponsored content Today at 6:04 pm


      Current date/time is Fri Dec 09, 2016 6:04 pm