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

» Ball shooting Crossbows worth the bother
by topfmine Wed Sep 15, 2021 3:24 pm

» Chu Ko Nu - repeating chinese crossbow
by Dark Factor Mon Sep 06, 2021 10:36 am

» Skew of tiller
by drawknife Fri Aug 27, 2021 9:18 am

» tiller desgin
by crusader Wed Aug 18, 2021 10:37 am

» Want to build modern target crossbow
by ora8i Fri Aug 13, 2021 1:20 pm

» starting a 1400's replica
by tghsmith Wed Aug 11, 2021 10:25 am

» New Medieval just about finished
by Dark Factor Mon Aug 02, 2021 6:41 am

» How do I tune this
by stuckinthemud1 Sun Jul 25, 2021 3:14 am

» Plans and materials for my first build
by c sitas Sat Jul 03, 2021 7:39 am

» Bolt rest
by stuckinthemud1 Mon Jun 14, 2021 3:24 pm

» Collotiere a Charavines crossbow
by stuckinthemud1 Sun Jun 06, 2021 2:25 pm

» ash lath and pin-lock crossbow
by stuckinthemud1 Wed Jun 02, 2021 7:56 am

» Late medieval tournament distances?
by stuckinthemud1 Thu Apr 15, 2021 8:20 am

» Cutting delrin straight by hand?
by kenh Thu Apr 01, 2021 8:24 pm

» Other forums like this one?
by stuckinthemud1 Tue Mar 30, 2021 9:23 am

» new find in china, terra cotta warrior site
by tghsmith Thu Mar 25, 2021 4:42 am

» Crossbow Books
by Andy. Sun Mar 14, 2021 3:46 pm

» 95lb ancient crossbow shot faster than 960lb medieval
by Fangbows Fri Mar 12, 2021 11:36 pm

» best type of horn to use..
by kenh Tue Mar 09, 2021 3:16 pm

» re-introduction
by tghsmith Sun Mar 07, 2021 3:15 pm

» 4 fletch question
by 8fingers Fri Feb 05, 2021 3:14 am

» fix bolts
by MPDVM Tue Feb 02, 2021 7:40 pm

» Reverse draw compound bow build
by c sitas Tue Feb 02, 2021 7:20 pm

» New Build for 2020
by Gnome Wed Jan 27, 2021 6:19 am

» Spanning bench ideas
by stuckinthemud1 Fri Jan 08, 2021 1:07 pm


2 posters

    Limb harding\ tempering ?

    avatar
    ragumup
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 3
    Join date : 2018-06-07

    Limb harding\  tempering ? Empty Limb harding tempering ?

    Post by ragumup Tue Jul 03, 2018 3:42 am

    Hi, new here ,  just looking for someone to spelt out how you go about heating/ tempering a leaf spring prod for safety reasons... is it (after cutting it ) heat it to bend it (recurve) then reheat then quench in water\oil then grind it clean then reheat slowly until blue ?  do you have to reheat the whole prod or just the parts you've heated to bend ? also if you leave more steel around the centre hole will that be sufficient ? 
     
    thanks in advance.


    Last edited by ragumup on Thu Jul 05, 2018 11:48 am; edited 1 time in total
    OrienM
    OrienM
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 195
    Join date : 2014-08-01
    Age : 45
    Location : New Mexico, USA

    Limb harding\  tempering ? Empty Re: Limb harding\ tempering ?

    Post by OrienM Wed Jul 04, 2018 8:52 am

    I hate to be discouraging, but even as a longtime knifemaker, I found it very difficult to harden and temper a steel prod. You need to heat the entire thing evenly to critical temperature, quench it (warm canola oil works well), then temper it to remove the brittleness. 

    The easiest method might actually be to take your shaped prod to an automotive spring shop, and have them heat treat it...it can be treated just like a conventional auto spring.

    Another option is to avoid damaging the original spring temper...just keep it cool while cutting, and don't try to modify the original profile (no recurves, etc). If you see any oxide colors on the steel while cutting, stop immediately and quench in water to keep it from over-tempering.
    avatar
    ragumup
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 3
    Join date : 2018-06-07

    Limb harding\  tempering ? Empty Re: Limb harding\ tempering ?

    Post by ragumup Thu Jul 05, 2018 7:33 am

    Thanks for the reply ,what temperature is the critical temperature just for the record ?
    I've already tried to do a prod put safety cords on it just in case.  I did try to heat it up then quench in clean warm engine oil but only the ends that I recurved  pale  without the recurve it was just to slow  then I reheated the ends until blue been shooting it a while now its about 200lb plus...what the percentage of prods breaking & injuring\killing folk ...lol
    OrienM
    OrienM
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 195
    Join date : 2014-08-01
    Age : 45
    Location : New Mexico, USA

    Limb harding\  tempering ? Empty Re: Limb harding\ tempering ?

    Post by OrienM Thu Jul 05, 2018 8:48 am

    Critical temp varies depending on the steel alloy, somewhere between 1340-2500F (to my eye, it's usually a low-orange color). I don't have a way to measure such high temps in my shop, so I look for a phenomenon called "decalescence", which indicates critical, and looks like a shadow passing through the hot steel. (if you google 'decalescence', there is good youtube video showing the effect.)

    As long as you tempered your prod ends after quenching, you should be fairly safe from a prod explosion...good idea to put a strap on too, just in case.

    To be honest I found making steel prods a little scary, and after a few, I moved on to wood and sinew prods, which would be a little safer if they failed. They also seem to shoot a bit faster.
    avatar
    ragumup
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 3
    Join date : 2018-06-07

    Limb harding\  tempering ? Empty Re: Limb harding\ tempering ?

    Post by ragumup Wed Jul 18, 2018 2:03 am

    Thanks for the advice... your right it’s not that easy to harden/temper .Limb harding\  tempering ? Ab426110Limb harding\  tempering ? Ab426110

    Sponsored content

    Limb harding\  tempering ? Empty Re: Limb harding\ tempering ?

    Post by Sponsored content


      Current date/time is Sat Sep 18, 2021 8:22 am