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

Latest topics

» Beware of Alchem
by Geezer Yesterday at 3:38 pm

» Crossbow with built in lever?
by John Edgerton Thu Aug 17, 2017 12:38 pm

» Of Bows and Torsion Engines
by JacobL Mon Aug 14, 2017 12:03 pm

» Early Lever and pin Crossbow
by topfmine Mon Aug 14, 2017 8:56 am

» Crusader crossbow
by topfmine Mon Aug 14, 2017 8:53 am

» First Efforts
by rickraedeke Tue Aug 08, 2017 5:25 am

» aluminum prod
by Phil Abrahams Fri Aug 04, 2017 8:38 am

» First whitetail buck taken with medieval crossbow
by Phil Abrahams Fri Aug 04, 2017 3:38 am

» Airsoft Crossbow
by JacobL Wed Aug 02, 2017 9:11 pm

» Questions about steel prod specs
by JacobL Mon Jul 31, 2017 8:25 pm

» Faking a medieval composite crossbow prod.
by JacobL Mon Jul 31, 2017 8:13 pm

» Airsoft Bow
by JacobL Sun Jul 30, 2017 1:56 pm

» Hello All!
by JacobL Sun Jul 30, 2017 12:54 pm

» Padre Island Bow
by Geezer Wed Jul 26, 2017 12:14 pm

» Blocked pictures by Photobucket
by Crossbowmen Mon Jul 24, 2017 1:33 pm

» Geezer website?
by Geezer Fri Jul 21, 2017 3:01 pm

» Could I get advise on order of operations?
by Bs1110101 Wed Jul 19, 2017 4:02 am

» Renaissance Sporting crossbow
by chaz Mon Jul 10, 2017 12:22 am

» Welcome! Welcome! Welcome!
by Agniznag Sat Jul 08, 2017 12:26 pm

» The Arbalist Guild - Around the World
by Agniznag Sat Jul 08, 2017 11:56 am

» opinions please
by Geezer Thu Jul 06, 2017 10:19 pm

» Hello all!
by Tarzan65 Thu Jul 06, 2017 10:54 am

» Yet another one
by Daniel Levesque Sun Jul 02, 2017 9:37 am

» Renaissance peep sight
by kenh Fri Jun 30, 2017 4:48 am

» Chinese crossbow with auxiliary string?
by stm2010 Mon Jun 26, 2017 9:48 am


    Aluminum sear plate for an under-100lb crossbow?

    Share
    avatar
    Xamllew
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 72
    Join date : 2015-06-13
    Age : 25
    Location : Florida

    Aluminum sear plate for an under-100lb crossbow?

    Post by Xamllew on Wed Feb 17, 2016 5:40 am

    Hey guys, I wanted to see if anyone had tried something like this, I know sear plates and the contact surface on the tickler bear an immense load and the pressure on heavier crossbows can eat away at the steel of the sear/tickler, but do you think that I could get away with aluminum sear plate/tickler parts in a crossbow drawing only something like 90lbs?

    If you're wondering why I would use aluminum, I haven't got the tools necessary to cut thick gauge mild steel, but aluminum can be cut with a reasonable amount of elbow grease.
    avatar
    Onager Lovac
    Workshop Savvy

    Did you see my tool collection?


    Workshop SavvyDid you see my tool collection?

    Posts : 120
    Join date : 2015-06-18
    Age : 26

    Re: Aluminum sear plate for an under-100lb crossbow?

    Post by Onager Lovac on Wed Feb 17, 2016 4:25 pm

    I think you could get away with it, aluminum is not very different from bronze and the nut and tickler setup can withstand a lot, 100 pounds should be no problem provided your sear is more than 1/8" thick, but steel is a lot better and you could build one with very simple tools like a steel vice, a hacksaw and a metal file, you could get all the tools for around 30 dollars, and 4 dollars for a 10 foot piece of 3/16" thick steel.

    c sitas
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 427
    Join date : 2012-11-24

    Re: Aluminum sear plate for an under-100lb crossbow?

    Post by c sitas on Thu Feb 18, 2016 7:02 pm

    x, have you ever studied triggers? Ivo, on this site has a fantastic run down on them . One thing I learned is  how much the actual holding weight changes on parts just by the way you set them up . That alone can be huge.Look em over , man you can really get some ideas.
    avatar
    kenh
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 727
    Join date : 2012-08-03
    Age : 69
    Location : Living Aboard a Sailboat in Fort Myers, FL

    Re: Aluminum sear plate for an under-100lb crossbow?

    Post by kenh on Thu Feb 18, 2016 8:26 pm

    No reason you can't use aluminum on a low-weight bow.  There are aluminum alloys almost as soft as gold, and almost as hard as steels.  I should think a look around your local hardware store might turn up a bit of aluminum or steel that would need minimal re-working to be a sear plate.

    As c.sitas says, check out some of the action designs that Ivo and others have posted here.  Search on "trigger" for starters...

    c sitas
    Crossbow Junkie

    I live here!


    Crossbow JunkieI live here!

    Posts : 427
    Join date : 2012-11-24

    Re: Aluminum sear plate for an under-100lb crossbow?

    Post by c sitas on Fri Feb 19, 2016 8:12 am

    X ,there was one style in particular that I seen  was way cool, be really simple to make. It used the regular rolling claw but the way they caught it was way cool . The holding weight was next to nothing. I don't remember what it was called, all I know is it's on here and Ivo explained it. He goes to length tell explain how to get the holding weight down.There are also several methods for that .

    Random_shotz
    Fresh Blood

    Doesn't mean
    I'm new to crossbows


    Fresh Blood Doesn't meanI'm new to crossbows

    Posts : 2
    Join date : 2015-10-30

    Tickler and contact issues?

    Post by Random_shotz on Sat Feb 20, 2016 11:53 am

    Ho do you plan to make the tickler? Aluminum won't bend cold, so you'll need a torch, vise, etc. The sliding friction of aluminum-aluminum contact is going to be somewhat greater than that of steel and the surfaces are likely to smear over time even with little pressure. The problem with aluminum is not just the hardness, but that it is also prone to galling. I don't know if all that will hurt accuracy, but it sure won't help. 

    I like Onager Lovac's idea of getting a piece of 3/16" or even 1/8" steel better; it will only take minutes to hacksaw through, a few more to file the edges smooth and you'll have a durable and consistent sear action. IMHO, of course.
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 945
    Join date : 2010-01-12
    Age : 69
    Location : Austin, Texas, USA

    Re: Aluminum sear plate for an under-100lb crossbow?

    Post by Geezer on Thu Feb 25, 2016 9:33 pm

    I used to make hardwood roller-nuts for medieval type crossbows by inserting a piece of brass sheet for a sear (sear fitted in a keyway, typical medieval European style) It worked against a trigger of 3/8 in. brass bar stock. This was for bows under 80 lb.  Surprisingly the brass sears held up quite well.  I wouldn't recommend doing this with a 100 lb. bow, but in fact you should be able to reinforce a plastic or even hardwood (oak or maple, f'rinstance) roller with a piece of steel hacksaw blade or piece of brass sheet (brass say, 1/16 in. thick) and get years of good service.  As for aluminum, as others have said, it galls and also work-hardens. It's not really a good material for moving, highly stressed parts. You should be able to make lockplates, frames, bow-clamps, etc. of aluminum with good success.  Geezer.
    avatar
    Xamllew
    Tinkerer

    If there is a will, there is a way.


    TinkererIf there is a will, there  is a way.

    Posts : 72
    Join date : 2015-06-13
    Age : 25
    Location : Florida

    Re: Aluminum sear plate for an under-100lb crossbow?

    Post by Xamllew on Sat Feb 27, 2016 2:38 pm

    Thanks for all the great feedback guys. I've decided to just go with mild steel cut from a plate, I guess that shouldn't be too Much for a coping saw to handle. I didn't realize aluminum would be so problematic.
    avatar
    Geezer
    Master Crossbowyer
    Master Crossbowyer

    Posts : 945
    Join date : 2010-01-12
    Age : 69
    Location : Austin, Texas, USA

    Re: Aluminum sear plate for an under-100lb crossbow?

    Post by Geezer on Sun Feb 28, 2016 7:04 am

    Aluminum IS reasonably easy to work and fine for lightweight structural stuff, just not so great for highly stressed and wearing parts. You can build frame, rails, even prod mountings of aluminum.  In fact, you should be able to cut brass or mild steel sheet with a decent set of metal shears for $15-20.  Geezer.

    Sponsored content

    Re: Aluminum sear plate for an under-100lb crossbow?

    Post by Sponsored content


      Current date/time is Sat Aug 19, 2017 5:20 am