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

» 12th Century Chinese Crossbow Chronographed
by stuckinthemud1 Fri Nov 24, 2023 3:50 pm

» Crossbow Stock
by kenh Tue Oct 31, 2023 6:19 am

» Colletiere a Charavines continuing experiment
by stuckinthemud1 Sat Oct 07, 2023 5:36 am

» Cocking - how
by stuckinthemud1 Thu Aug 03, 2023 4:24 am

» Questions around heavy crossbow lath buildin
by stuckinthemud1 Wed Apr 26, 2023 1:10 am

» Arab Crossbow
by stuckinthemud1 Tue Apr 25, 2023 7:57 am

» prod angle, and lever trigger for sale anyone?
by stuckinthemud1 Mon Mar 20, 2023 5:54 am

» flexible string
by jasper1978 Mon Mar 20, 2023 1:25 am

» [solved]Skane/Lillohus crossbow thread
by stuckinthemud1 Sun Mar 19, 2023 7:44 am

» jens sensfelder
by jasper1978 Wed Mar 08, 2023 11:58 pm

» 400lb Windlass crossbow bolts weight and accuracy shooting high.
by stuckinthemud1 Sun Mar 05, 2023 2:53 pm

» Codex Löffelholz crossbow
by stuckinthemud1 Tue Jan 24, 2023 4:14 pm

» Digitar prodsc
by stuckinthemud1 Sun Jan 15, 2023 2:42 pm

» Troubleshooting
by Andy. Fri Jan 06, 2023 12:29 pm

» Wood Prods
by stuckinthemud1 Fri Dec 30, 2022 12:47 pm

» Colletiere a Charavines crossbow
by stuckinthemud1 Fri Dec 30, 2022 8:54 am

» Simplified Löffelhotz speedloader
by stuckinthemud1 Fri Dec 09, 2022 4:05 pm

» Fiberglass H-bows
by c sitas Sat Nov 12, 2022 8:44 am

» Bad Antler
by drawknife Sat Nov 12, 2022 3:48 am

» Anyone make their own bolts?
by Juniper Mon Oct 17, 2022 8:20 am

» Josef alm in English
by Juniper Sat Oct 15, 2022 4:22 am

» Qin/Han lock drawings
by kenh Fri Sep 23, 2022 8:16 pm

» stirrup dimensions?
by stuckinthemud1 Thu Sep 01, 2022 1:49 pm

» Skane/Lillohus lockbow information needed
by stuckinthemud1 Sun Aug 14, 2022 6:23 am

» need help contacting le musee Dauphinois Grenoble
by stuckinthemud1 Sat Aug 13, 2022 3:22 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 : 47
    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 : 47
    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 Wed Feb 28, 2024 11:02 pm