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Thread: Piston gliding

  1. #1
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    Piston gliding

    I seen a few threads about gliding and buttoning pistons, they all relate to weihrauch, weíre any of the other guns like old bsa or we letís ever glided?

  2. #2
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    AA are glided out of the box, as are modern LGV and LGU.
    Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.

  3. #3
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    Quote Originally Posted by johnnytheboy View Post
    I seen a few threads about gliding and buttoning pistons, they all relate to weihrauch, weíre any of the other guns like old bsa or we letís ever glided?
    Most of the other makes manage quite well but HWs need all the help they can get.

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    Quote Originally Posted by WebleyWombler View Post
    Most of the other makes manage quite well but HWs need all the help they can get.
    It is more of a case of 'you can't polish a turd'
    "But we have our own dream and our own task. We are with Europe, but not of it. We are linked, but not comprised. We are interested and associated, but not absorbed."
    Winston Churchill 1930

  5. #5
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    Gliding was popularised (pioneered?) by Venom and other 80s airgun tuning houses. At the time, most of their work was on HWs, hence the association between HWs and gliding.

    You can button, glide or otherwise support both ends of most pistons, but itís a lot easier to do well on actions with a central piston rod (HW, AA TX, etc) than those that engage the sear at the bottom.

  6. #6
    ccdjg is offline Airgun Alchemist, Collector and Scribe
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    What the hell is "piston gliding"?

    If it just means making the piston fit for purpose, why not say so?.

  7. #7
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    Quote Originally Posted by Geezer View Post
    Gliding was popularised (pioneered?) by Venom and other 80s airgun tuning houses. At the time, most of their work was on HWs, hence the association between HWs and gliding.

    You can button, glide or otherwise support both ends of most pistons, but itís a lot easier to do well on actions with a central piston rod (HW, AA TX, etc) than those that engage the sear at the bottom.
    Can it be done to those that engage the sear at the bottom?

    Will Delrin/nylon buttons eventually leave wear marks on the cylinder?

  8. #8
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    Quote Originally Posted by norris View Post
    Can it be done to those that engage the sear at the bottom?

    Will Delrin/nylon buttons eventually leave wear marks on the cylinder?
    Yes, I think so.

    No. Probably.

  9. #9
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    Pistons where the sear engages the skirt need to be harder than the pistons with lathing rods, so they will often be harder to machine for synthetic buttons.
    Glue on buttons can be used, but for example BSA supersport/lightning/superstar pistons leve very little room for glue on buttons as they are a quite close fit in the cylinder.
    Too many airguns!

  10. #10
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    Quote Originally Posted by Shed tuner View Post
    AA are glided out of the box, as are modern LGV and LGU.
    And the CZ Slavia 634 also had a Air Arms style rear synthetic piston bearing.
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  11. #11
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    Quote Originally Posted by norris View Post
    Can it be done to those that engage the sear at the bottom?

    Will Delrin/nylon buttons eventually leave wear marks on the cylinder?
    Plastic wont abrade steel - it is the basic principle of synthetic bearings.
    "But we have our own dream and our own task. We are with Europe, but not of it. We are linked, but not comprised. We are interested and associated, but not absorbed."
    Winston Churchill 1930

  12. #12
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    Red face piston gliding

    Quote Originally Posted by ccdjg View Post
    What the hell is "piston gliding"?

    If it just means making the piston fit for purpose, why not say so?.


    im in the same boat bud, dont have a clue . would be interesting to find out tho.

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    Thumbs up

    Quote Originally Posted by Rob.R View Post
    im in the same boat bud, dont have a clue . would be interesting to find out tho.
    Oh another Dunstablian
    them there springer's are soooooo addictive

  14. #14
    ccdjg is offline Airgun Alchemist, Collector and Scribe
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    Quote Originally Posted by joffy View Post
    Oh another Dunstablian
    I think there may be a few more of us.
    Nothing wrong with admitting ignorance, even about marketing gimmicks.

  15. #15
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    Piston Gliding.

    Friction is a wasteful by product of metal to metal contact. Instead of large expanses of piston, sliding against the inside walls of the rifle's chamber, actions run on nylatron etc bearings - in fact there's no metal to metal contact at all. Venom and Airmasters was doing this method back in the 80's. No marketing gimmick as owners of their fine rifles will tell you and the fact AA and Walther copied it for their production rifles. Mach 1.5

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