Mechanism and new casette

I designed a Delrin cassette for use with my mechanism. I normally install the mechanism directly into the wood stock but I wanted to have a cassette option in case I wanted to mass produce a new speargun model. It’s still entirely silent since the sheer swings without hitting the top of the cassette.

14 thoughts on “Mechanism and new casette

  1. Bonjour René,
    Je vois sur cette page que tu as développé une gamme de cassettes avec mécanismes à intégrer dans les fûts en bois d’arbalètes.
    Est-il possible de t’en commander pour équiper mes arbalètes ?
    Merci de ta réponse


    • Salut Jean-Pierre,
      Je ne vend pas de mécanismes; seulement les arbalètes. Je suis d’ailleurs surpris de ne pas encore avoir été copié par les chinois.

  2. OK pour une arbalète de 90 cm de fût et flèche de 130 cm.
    Combien cela coûte et quel délai pour l’obtenir car je pars chasser aux Açores fin juillet.
    Merci de ta réponse

  3. Bonjour Mr Potvin,

    je te félicite tout d’abord pour ton magnifique travaille sur les arbalètes en bois, aussi te remercier pour ce site qui nous a permis de voir ton savoir-faire sur ces outils.

    Je souhaite avoir une idée sur les prix ainsi la possibilité de livrer au Maroc SVP.

    Merci et bonne journée.

  4. Hi Rene,

    Years ago I had asked a few questions regarding the trigger mechs you were making.
    I believe you used a blue plastic cassette material that you said didn’t work that well….can’t remember why, but I’m guessing the pin holding the sear started deforming the plastic.

    The 3-piece mech and delrin cassette look great!! No files & vise now I guess!

    Anyway, I was wondering if any special kind of delrin was needed for the cassette?… to handle the forces exerted on it by the pin holding the sear.


    • Hello Rob, the delrin is the standar high density stuff. It’s been machined on a CNC. It works great but I still prefer the no casette system. I guess the casettes will be the cheaper alternative.

  5. Rene,
    I just realized it is 2-piece mechanism with a bottom line release!
    It looks like the line release works without the need for a spring…is that correct?
    Very nice design.


    • Yes Rob, the line release does not require a spring. The two piece design you see there is much better than the traditionnal designs because of our ability to carve a large radius on a shall stretch of hard to reach metal by using new laser cutting technology. There is no need for a three part mecanism on a speargun as long as you design it well.

  6. Rene, email me because the renesub trigger release is perfect for me. I am using a longbow trigger release attached to a car central locking system for my radio control release. This activates a bungee which pulls the normal rope operated release system, but your system is neat tidy and weatherproof, I assume. I can’t believe many people use spearguns indoors exclusively.
    keep up the good work.
    ps you can see the system working here QpozEyu8Un5h

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