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Making an Assisted Opening Knife?

Discussion in 'Shop Talk - BladeSmith Questions and Answers' started by jaymeister99, Jun 21, 2011.

  1. jaymeister99

    jaymeister99

    812
    Sep 14, 2010
    Are there any suppliers that sell parts (particularly springs) to make AO knives? Also any tutorials on making these?
     
  2. SteelSlaver

    SteelSlaver

    Feb 17, 2007
    Knifekits.com sells a button lock kit and springs Look under under folders for DDR-3BL and parts for same. Could that system be used?
     
    Last edited: Jun 22, 2011
  3. jaymeister99

    jaymeister99

    812
    Sep 14, 2010
    Don't think so, I looked there. I think those are only to make switchblades.
     
  4. Stacy E. Apelt - Bladesmith

    Stacy E. Apelt - Bladesmith ilmarinen - MODERATOR Moderator Knifemaker / Craftsman / Service Provider

    Aug 20, 2004
    All the parts will be made in the construction of the knife...just like in a lock back. It isn't really a stock parts type of thing, as far as I know.

    You can order round and sometimes square spring rod and piano wire from most knife supply catalogs and places like McMasters.
     
  5. Fellhoelter

    Fellhoelter

    Dec 29, 2005
    I don't think there are any assisted opening mechanisms in the public domain.

    Does anybody know of one?
     
  6. Railrider1920

    Railrider1920

    403
    Dec 14, 2010
    When I first started looking into knife making, an AO knife is what I really wanted to make. I picked up a couple cheap
    ($5) ones at a knife show just to take apart. One of them has a long flat spring that was cut out of flat stock. I have read threads that suggest using that type of spring and not the wire type. What I'd like to do one day is to just trace the parts and cut them out and see if they will work when I put them together. Maybe do that several times, making changes along the way.

    Not what you were looking for, but maybe it'll help.
    Maybe something from this site

    http://www.assistedknife.com/index.cfm/fa/categories.main/parentcat/26098
     
  7. mattguitarman13

    mattguitarman13

    13
    Jun 12, 2011
    ive taken apart many AO knives with various different firing mechanisms, the better ones use a 15/16"x3/32" extension spring mounted in the back spine of the knife and the cheaper flea market ones use a wireform spring mounted under the scales. ive tried using hardware store extension springs for repair and found them to be underpowered however these where going into a stock setup, im sure you can modify your custom build to better accomidate a hardware store spring...perhaps with a shorter pull bar (so as to pull the spring further) or upgrade to slightly larger heavier gauge wire extension spring. for example 1 3/16" X 1/8" spring. I found these at my local hardware store (TM Hardware.) hope this was helpful. matt
     
  8. mattguitarman13

    mattguitarman13

    13
    Jun 12, 2011
    also if u decide to make your own wireform spring i recommend using square wire as its stronger, perhaps .04" wire diameter would give it a healthy snap, if youd like i can email you a cad drawing of a wireform i copied from a flea market knife. its diameter is .01 which was weak so experiment with different size wire. best of luck matt
     
  9. jaymeister99

    jaymeister99

    812
    Sep 14, 2010
    Thanks, actually thats pretty close to what I was looking for. I was considering buying a cheap AO to pull apart, but I didn't think there were too many cheap ones out there. I'll buy one of these cheapies and figure it out.
     
  10. jaymeister99

    jaymeister99

    812
    Sep 14, 2010
    Are there any good AOs you can recommend to take apart? Say under $30?
     
  11. Nebulae

    Nebulae

    Aug 24, 2009
    Kershaw oso sweet, its got speed safe and I got mine for $20 on amazon.
     
  12. mattguitarman13

    mattguitarman13

    13
    Jun 12, 2011
    the cheap one i pulled apart was a platinum collection from wildbillswholesale.com it was $6.99 i bought it more to practice my filework on (which actually turned out pretty good, vine design) its a low quality knife but after a little dolling up it grabs peoples attention. i actually use it as my EDC at the moment because it was cheap enough im not scared to ruin it. Yeah usually thats where i look for tear apart knives is on wholesale sites or flea markets. the have crkt lift offs on there for 35 bucks. as stated by nebulae amazons also good if your looking for something a little better quality.
     

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