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

Latest topics

» Its good to be back!!
by Juan galeano Yesterday at 1:32 pm

» New member here!
by Geezer Wed Mar 22, 2017 4:31 pm

» Split limb and Draw length
by c sitas Mon Mar 20, 2017 8:25 pm

» Starting a New One
by c sitas Sun Mar 19, 2017 5:24 pm

» H L Bailey Plans
by ora8i Sat Mar 18, 2017 9:45 am

» Compact repeating compound project
by Crossbowmen Fri Mar 17, 2017 3:36 am

» Medieval Crossbow Shooting video
by Onager Lovac Thu Mar 16, 2017 3:32 pm

» First submission
by War Song Thu Mar 16, 2017 1:25 pm

» GLOSSARY OF TERMS
by FrenckBrambo Mon Mar 13, 2017 6:30 am

» PVC pipe prod: Normal or loose laminate?
by kenh Sat Mar 11, 2017 11:11 am

» Modern 3-finned bolts in medieval style crossbows?
by c sitas Fri Mar 10, 2017 3:32 pm

» failure with a fiberglass tension bar loose laminate prod
by War Song Thu Mar 09, 2017 8:52 pm

» How to make crossbow tiller
by War Song Wed Mar 08, 2017 7:04 pm

» WTB: Medeival type crossbow
by kenh Wed Mar 08, 2017 1:18 pm

» Berkhamsted Castle and Glasgow Museum wooden prod crossbow
by OrienM Sun Mar 05, 2017 8:38 am

» How to measure and cut leather for prod
by Geezer Fri Mar 03, 2017 4:26 pm

» Prod construction
by OrienM Thu Mar 02, 2017 12:34 pm

» New compound crossbow build
by FrenckBrambo Tue Feb 28, 2017 3:17 pm

» Accuracy of the Claplock versus Rollernut
by FrenckBrambo Tue Feb 28, 2017 2:51 pm

» Heavy German sporting crossbow build
by Crossbowmen Tue Feb 28, 2017 2:06 pm

» Finished Crossbow
by OrienM Sat Feb 25, 2017 9:14 am

» Fixing a bad delflex
by Daniel Levesque Thu Feb 23, 2017 9:52 am

» First Time Crossbow Building Questions
by c sitas Wed Feb 22, 2017 8:50 pm

» Restoration
by c sitas Tue Feb 21, 2017 7:58 am

» Why did George Stevens glue a layer of linen to the prod and then wrap the prod in black tape?
by Geezer Sun Feb 19, 2017 8:31 pm


    roller nut difficulties

    Share

    kruisboog
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 3
    Join date : 2016-11-03

    roller nut difficulties

    Post by kruisboog on Thu Nov 03, 2016 1:27 am

    Hello everyone,

    I want to make my first medieval crossbow. The difficulty i have is making the rolller nut.
    What can i use for suitable steel does anyone know where i can find such a large piece of steel?

    I also thought about making one of hard wood, how much pound can it hold?
    Maybe i can make one from a lamination from pieces of hard wood and steel plates and pin and epoxy them together.

    thanks in advance
    avatar
    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 692
    Join date : 2012-08-03
    Age : 68
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Re: roller nut difficulties

    Post by kenh on Thu Nov 03, 2016 5:02 am

    Steel = NO. Too heavy.  Back in the day roller nuts were made from very hard woods, often from root swirls so here was no linear grain.  They could stand a couple hundred pounds at least.  You could use ebony or African Blackwood, or Lignum Vitae.  Not European woods, but very, very dense and hard.  The other material that was used was the boss end of large antlers like moose or elk.

    kruisboog
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 3
    Join date : 2016-11-03

    Re: roller nut difficulties

    Post by kruisboog on Thu Nov 03, 2016 6:33 am

    Thanks for your reply.

    In some pet shops they sell pieces of antler maybe i can use these.
    Can i use any piece of the antler or does it has to be the end part?
    avatar
    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 692
    Join date : 2012-08-03
    Age : 68
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Re: roller nut difficulties

    Post by kenh on Thu Nov 03, 2016 6:46 am

    What they sell in pet shops is usually cow bone slices.  Much softer than antler.  Unless you live where there are MONSTER moose, you need to use the end because that' where you'll get enough antler to do the job.
    avatar
    septua
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 61
    Join date : 2012-12-02
    Age : 79
    Location : Ohio

    Re: roller nut difficulties

    Post by septua on Thu Nov 03, 2016 10:48 am

    Cream colored hmwpe is polyethylene and very strong, not heavy considering its strength.
    This material is readily available and used in hip replacements. The horn is still better in the long run.

    kruisboog
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 3
    Join date : 2016-11-03

    Re: roller nut difficulties

    Post by kruisboog on Thu Nov 03, 2016 12:31 pm

    Thanks for the polyethylene recommendation i would never have thought of that. They sell fallow deer and red deer stag at the pet sore which one do you think is the best?
    avatar
    Onager Lovac
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 103
    Join date : 2015-06-18
    Age : 25

    Re: roller nut difficulties

    Post by Onager Lovac on Thu Nov 03, 2016 4:43 pm

    Welcome Kruisboog, i made my last nut out of a bronze or brass weight, relatively easy to work with, you might be able to buy one from a hardware store.
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 902
    Join date : 2010-01-12
    Age : 69
    Location : Austin, Texas, USA

    Re: roller nut difficulties

    Post by Geezer on Fri Nov 04, 2016 3:40 pm

    Roller nut materials: There are plenty. For cost and efficiency, I normally use Delrin (polyethelyne) for the nut, 1 and 3/8 or 1 and 1/2 in diameter will work fine, if you put in a steel plug for the trigger to work against.  The best quality medieval hunting bows usually use antler (not cow-horn) I find Moose-stems work very well.  Axis stag is good too if you can get bits thick enough.  Elk horn tends to be very pithy in the middle, so doesn't make a good roller.  If you're working at less than 100 lb. a good hardwood like maple or oak will give years of good service (again, you need a hard point, brass or steel for the trigger sear) My very first crossbow used a brass nut.  Its fairly easy to work and looks snazzy, but the stuff is very heavy... the slow turning will contribute to misfires, though drilling a few lightening holes should help.  A solid brass or steel nut probably won't need a reinforced hard-point for the sear.  If you're working from Payne Gallwey's plans, I recommend you make your nut socket a bit deeper than specified.  He sez to sink it 3/5 of diameter, but 2/3 is more secure.  Have fun with your build.  Geezer.
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 902
    Join date : 2010-01-12
    Age : 69
    Location : Austin, Texas, USA

    Re: roller nut difficulties

    Post by Geezer on Fri Nov 04, 2016 3:43 pm

    PS: I generally don't use Delrin for a roller nut, even with a steel sear if the bow is much over 150 lb.  That's when I go to moose horn.  Geezer.
    avatar
    Onager Lovac
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 103
    Join date : 2015-06-18
    Age : 25

    Re: roller nut difficulties

    Post by Onager Lovac on Fri Nov 04, 2016 4:00 pm

    If you decide to use wood you can use a hole saw like this one (the one in the pictures is 1 1/2" wide, the wood is walnut root)


    you can also use an adjustable drill bit like the one in the next picture to bore the side of the wood to fit the nut snugly (mine goes from 7/8" to 4")
    avatar
    Gnome
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 399
    Join date : 2011-10-16
    Age : 53
    Location : Capitol Area Maryland

    Re: roller nut difficulties

    Post by Gnome on Fri Nov 18, 2016 9:13 am

    Just to clarify, hmwpe and Delrin, a brand name for polyoxymethylene, are two different types of high strength engineering plastic. I've used both without issue with prods up to 220 lb draw weight, with steel sear inserts. Delrin is a bit easier to work in my opinion and you can get a glossy finish, but the hmwpe is available in more natural colors, like the cream. So far I've only found Delrin in black or white.
    Gnome

    Sponsored content

    Re: roller nut difficulties

    Post by Sponsored content


      Current date/time is Fri Mar 24, 2017 4:14 am