The Arbalist Guild

Would you like to react to this message? Create an account in a few clicks or log in to continue.

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

Latest topics

» Look what the smith sent
by stuckinthemud1 Fri Jul 31, 2020 1:35 pm

» Covid 19 and crossbow builders
by kenh Thu Jul 30, 2020 10:22 am

» Crossbow accuracy
by Geezer Thu Jul 30, 2020 7:51 am

» How do you feel about miniature crossbows?
by El Zurdo Wed Jul 29, 2020 7:21 am

» Claw crossbow prototype
by Dennis Greenaway Tue Jul 28, 2020 10:34 pm

» how to Build a non Chinese repeating crossbow?
by Dennis Greenaway Tue Jul 28, 2020 4:05 pm

» Just finished my windlass crossbow!
by Dennis Greenaway Tue Jul 28, 2020 4:01 pm

» Sinew backed crossbow prod tillering. Update and questions.
by stuckinthemud1 Tue Jul 28, 2020 2:43 am

» snakeskin not birch bark on composite bows in medieval period
by Cornerstone Mon Jul 27, 2020 3:50 pm

» two axle mechanism makers/accurate plans?
by stuckinthemud1 Wed Jul 22, 2020 10:34 am

» Anyone make their own bolts?
by MPDVM Tue Jul 07, 2020 11:14 pm

» ash lath and pin-lock crossbow
by stuckinthemud1 Sat Jul 04, 2020 2:42 am

» Stonebow Buildalong
by banuvatt Thu Jun 25, 2020 9:00 pm

» How to Attach a PVC Prod to a Stock?
by banuvatt Tue Jun 02, 2020 8:22 am

» finally started my first composite bow
by stuckinthemud1 Fri May 29, 2020 12:40 am

» AMAZING MINI CROSSBOW code name KillCovid-19
by El Zurdo Thu May 21, 2020 3:14 am

» Draw length ash lath
by banuvatt Thu Apr 23, 2020 9:47 am

» Would like to buy or rent a Han Chinese Trigger
by PierreC Thu Apr 23, 2020 2:37 am

» High Draw Weight PVC Crossbow Build
by banuvatt Fri Apr 17, 2020 3:07 pm

» Universal standard Crossbow nut
by Fangbows Tue Apr 14, 2020 11:57 pm

» Making Chinese 240lb Han Crossbow
by banuvatt Tue Apr 07, 2020 8:40 am

» Goat’s foot lever drawings
by Geezer Mon Mar 23, 2020 9:18 am

» First Build
by banuvatt Thu Mar 05, 2020 7:14 pm

» How to Test the Breaking Strength of a Matieral for a Bow String?
by banuvatt Thu Mar 05, 2020 4:06 am

» Can anyone help me ID this?
by Geezer Sat Jan 25, 2020 4:30 pm


    Nut Diagram

    avatar
    banuvatt
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 268
    Join date : 2018-09-12

    Nut Diagram Empty Nut Diagram

    Post by banuvatt on Fri Nov 08, 2019 11:15 am

    Nut Diagram Armbrus_artikel-nuss
    I found this diagram of a roller nut on this website http://www.xn--templerbhl-lcb.de/articles.php?article_id=1. I believe I have also seen it before in a Youtube video.
    Geezer
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 1178
    Join date : 2010-01-12
    Age : 72
    Location : Austin, Texas, USA

    Nut Diagram Empty Re: Nut Diagram

    Post by Geezer on Wed Nov 13, 2019 12:20 pm

    The nut diagram is reasonable, but will work better if the step cut in the bottom for the trigger to engage, is cut as a discrete pocket, leaving the roller essentially round on the bottom. A full step across the bottom will encourage the nut to oscillate as it rolls over in the socket.  A fully rounded bottom makes the nut run smoother.  You'll have fewer problems and a smoother release.  Geezer.
    Geezer
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 1178
    Join date : 2010-01-12
    Age : 72
    Location : Austin, Texas, USA

    Nut Diagram Empty Re: Nut Diagram

    Post by Geezer on Wed Nov 13, 2019 12:25 pm

    Second thought concerning the above nut diagram.  Try moving the sear-notch back, @ 5 mm behind dead center. Having the sear at dead center encourages the roller to rise in its socket under load, stressing the roller-socket's edges. Moving the sear-step back 5 mm will let the end of the trigger to take more of the rising load, which reduces stresses on the nut-socket.  Note late 15th century locks with two or more axles moved the sear to the back of the roller, rather than the bottom. That helps reduce the socket load even more, but pretty much requires a double-axle and seperate toggle to engage the sear.  I hope this make sense.  Geezer.
    avatar
    banuvatt
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 268
    Join date : 2018-09-12

    Nut Diagram Empty Re: Nut Diagram

    Post by banuvatt on Wed Nov 13, 2019 1:53 pm

    Okay thank you very much for your advice, it made sense.

    Sponsored content

    Nut Diagram Empty Re: Nut Diagram

    Post by Sponsored content


      Current date/time is Mon Aug 03, 2020 3:29 pm