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Thread: HW35 With Rotating Piston

  1. #1
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    HW35 With Rotating Piston

    Now Folks, following on from my post on the "HW35, A Few Questions" thread :-

    http://www.airgunbbs.com/showthread....07#post7588907

    I've been having a dabble but stalled through lack of essential parts.

    With thanks to CraigP, Spartan and Tinbum I now have enough parts to continue.


    The old HW piston :-

    image.jpg



    The new rotary piston :-

    image.jpg



    Now unfortunately I'd taken the cylinder I'm using for the gun back to bare metal, so I've spent the last few days building a heated fume bluing cabinet so that I can reblue the action before assembly. :-

    image.jpg



    Yes, it's a wheely bin with a heater in the bottom, so I won't be assembling the gun for a couple of weeks now until it's blued.




    All the best Mick

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    Heated wheelie bins? How the other half live eh.

    I'm looking forward to seeing this one
    Better to admit you walked through the wrong door than spend your life in the wrong room

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    Melted plastic, fire, chemicals, kerboom!!!
    Plinkerer and Tinkerer

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    Quote Originally Posted by tinbum View Post
    Heated wheelie bins? How the other half live eh.

    I'm looking forward to seeing this one

    The heated wheely bin is working a little bit too well, Nick.

    After only two hours rusting in acid fumes I'd got a healthy coating of red velvet rust which I've just boiled in water to convert to blacking.

    I'm off out now to buy an immersion heater element to build an electric boiling tank as I'm already fed up of messing around with Calor gas bottles.

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    Quote Originally Posted by T 20 View Post
    The heated wheely bin is working a little bit too well, Nick.

    After only two hours rusting in acid fumes I'd got a healthy coating of red velvet rust which I've just boiled in water to convert to blacking.

    I'm off out now to buy an immersion heater element to build an electric boiling tank as I'm already fed up of messing around with Calor gas bottles.
    Please tell me you have CCTV so we can all enjoy the show when it inevitably goes tits-up!
    Better to admit you walked through the wrong door than spend your life in the wrong room

  6. #6
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    Hi Mick

    Was a TX piston with a 30mm head ever an option?

    There is probably a fundamental reason why not but...

    Cheers
    Matty
    Opportunity is missed by most people, because it is dressed in overalls and looks like work.

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    Quote Originally Posted by MattyBoy View Post
    Hi Mick

    Was a TX piston with a 30mm head ever an option?

    There is probably a fundamental reason why not but...

    Cheers
    Matty
    no

    he's just nicked a TX piston rod... And Pro Elite piston is non-rotating, in case anyone is wondering (30mm)
    Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.

  8. #8
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    Just Hammerite it and get on with the build...

    Nicely done - looking forward to the end result, mate.
    Put on heading 270, assume attack formation

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    Quote Originally Posted by tinbum View Post
    Please tell me you have CCTV so we can all enjoy the show when it inevitably goes tits-up!
    There's a couple of tricks to stop rust bluing going tits up, Nick --- don't rust too long, and if in doubt, boil.
    Last edited by T 20; 21-11-2018 at 09:58 PM.

  10. #10
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    Quote Originally Posted by MattyBoy View Post
    Hi Mick

    Was a TX piston with a 30mm head ever an option?

    There is probably a fundamental reason why not but...

    Cheers
    Matty
    Good question, Matty, but the answer is no, it was never an option?

    To use a TX piston I'd have had to machine the front off the TX piston and then rough machine a new 30mm piston head for it, then weld the two halves together, and then machine the piston head to final size.

    Machining a one piece piston body is a piece of piss when compared with the above.





    All the best Mick

  11. #11
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    Quote Originally Posted by Craig-P View Post
    Just Hammerite it and get on with the build...

    Nicely done - looking forward to the end result, mate.
    Don't worry, Craig, the new bluing setup is working that well that I've boiled twice today already and if I don't get to boil later I'll have to shut it down for the night.

    BTW Cheers for the latchrod, and I'll machine you up a piston body ASAP.




    All the best Mick

  12. #12
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    Looking good, Mick, and looking forward to the finished articles from you and CraigyBoy breathing new life into the lovely old '35.

    At this rate, even TinnyBum's going to gate crash the party!
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    Have you considered a piston without bearing by the piston seal?

  14. #14
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    Quote Originally Posted by T 20 View Post
    Don't worry, Craig, the new bluing setup is working that well that I've boiled twice today already and if I don't get to boil later I'll have to shut it down for the night.

    BTW Cheers for the latchrod, and I'll machine you up a piston body ASAP.




    All the best Mick
    No rush at all mate, get yours all sorted first and enjoy yourself.
    Put on heading 270, assume attack formation

  15. #15
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    What are the advantages to having a fully rotating piston?
    Last edited by pigeondave; 21-11-2018 at 09:55 PM. Reason: cant spell

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