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Thread: O-rings

  1. #1
    Banned Groundhog66's Avatar
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    Default O-rings

    I have an assortment of lights, I would like to get a nice supply of O-riings for them. I have McLuxIII, PD-S (Ti & HA Alum), XR19-C, 27LT-S. Can anyone help me cover my bases for all sizes needed, thanks.

    Tim

  2. #2
    *Flashaholic* easilyled's Avatar
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    Default Re: O-rings

    Have you checked the sticky threads in the McGizmo forum?

    eg. "McGizmo products overview" etc.

    I think that information can be found in them, although it may take
    a little bit of tracking down.

    Bernie (Kiessling) has compiled very useful & comprehensive notes
    & great pictures to illustrate the outer and inner parts of all of
    Don's lights.
    Change is inevitable, except from a vending machine

  3. #3
    Banned Groundhog66's Avatar
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    Default Re: O-rings

    Quote Originally Posted by easilyled
    Have you checked the sticky threads in the McGizmo forum?

    eg. "McGizmo products overview" etc.

    I think that information can be found in them, although it may take
    a little bit of tracking down.

    Bernie (Kiessling) has compiled very useful & comprehensive notes
    & great pictures to illustrate the outer and inner parts of all of
    Don's lights.
    Yes, I checked that out. But I could not locate the specs for most of the lights. Thank you for the response.

    Tim

  4. #4

    Default Re: O-rings

    Speaking of O Rings...what size does he use between the lens and the head in the 27LT-S? I picked up a bezel from James and it resulted in a slightly loose lens. I couldn't find an exact fit from any at the hardware store...so I settled for one that is too fat but at least the lens doesn't rattle. It's not right though and I'd like to get it perfect. Any ideas? I'm thinking I may have to spring for the O-Ring assortment from MSC...
    --Peter

  5. #5
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    Default Re: O-rings

    Try post #27 in this thread:

    http://www.candlepowerforums.com/vb/...d.php?t=147672

    Don goes through the O-rings sizes/types for all his creations

    Hope that helps.

  6. #6
    *Flashaholic* easilyled's Avatar
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    Default Re: O-rings

    Quote Originally Posted by GRoLED
    Try post #27 in this thread:

    http://www.candlepowerforums.com/vb/...d.php?t=147672

    Don goes through the O-rings sizes/types for all his creations

    Hope that helps.
    That's a great help thanks.

    Maybe the info. should be added to the "McGizmo Product Overview" sticky
    thread?
    Change is inevitable, except from a vending machine

  7. #7
    Banned Groundhog66's Avatar
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    Default Re: O-rings

    ++1

  8. #8
    *Flashaholic* PoliceScannerMan's Avatar
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    Default Re: O-rings

    Save ya'll a link click, heres post #27 linked above....

    Quote Originally Posted by McGizmo
    Hi guys,

    I will be repeating some info here.

    On the XR19-C

    O-rings:
    XR-19 Head:
    Window seal - #019 EPDM (or the GID silicone)
    Head to pak seal - #017 Silicone (red)

    C pak:
    Boot Seal O-ring - #016 Silicone (red)
    Boot & Seal Retaining O-ring - #113 EPDM

    XR27 & S27 Head:

    Window Seal O-ring - 2 x 22 mm Buna (Nitrile)
    Window retaining O-ring - #025 EPDM
    Head to pak Seal - #017 Silicone (red)

    27LT & 27LT-S head:

    Window Seal - #023 EPDM
    2x head to Pak seal - #017 Silicone

    PD Piston:
    Piston to sleeve seal - #015 Silicone (use #016 for added protection but stiffer activation)

    PD head:

    Window Seal O-ring - #019 EPDM
    Head to sleeve seal O-ring - #017 Silicone


    *******

    Now as far as lubes go, there are incompatabilities galore.
    Silicone seems to work with most synthetics and most silicone greases. Petroleum based lubes can be a problem.
    EPDM is good with all silicone greases and most synthetics that I am aware of. YMMV

    If you get an O-ring from the hardware store, it is most likely Buna or Nitrile. I don't like to use this material but had to for size in the seal for the 27XR and 27S heads. It is OK as a seal and should it crack, you will see this. I couldn't find the metric O-ring in silicone or EPDM which I would have preferred. Buna (Nitrile) is subject to O-zone degradation, big time! If the material is kept lubed then you are OK. I have seen these in static, dry applications where they have failed. I encountered one in the guts of a SF a few years back that was in 4 pieces!
    -PSM

  9. #9
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    Default Re: O-rings

    Peter,

    I think you would need a slightly thicker than standard size for the 27LT-S. There's a microscopic difference in the light's physical spec that sometimes results in a loose fit for James' bezel rings (which were designed/created for the 27LT). Good luck in finding the answer though... I have the same combo and have asked this o-ring question before... Perhaps no one really knows?

    Chelly

  10. #10

    Default Re: O-rings

    Hi guys.Thanks for digging that info up. I recalled that I had posted it somewhere but that was as far as my memory went. If you have a situation where a "dash" size O-ring of 1/16" is a bit too thin, you may find a metric, 2 mm thick O-ring that can fix the problem. That is what I ran into with the Ti 27 heads.
    Build Prices .... some mods and builds (not 4 sale) "Nature can be cruel- but we don't have to be."~ Temple Grandin

  11. #11
    Banned Groundhog66's Avatar
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    Default Re: O-rings

    Why can't I find silicone in all the sizes, are they just not available? What is the next best option, I was shopping at the SS

  12. #12

    Default Re: O-rings

    Tim,

    I know that Wayne and Cindy have attempted to provide a service by stocking some of the common O-rings but it would be insane to try to handle all and in all flavors.

    In quantity, the source I use is Air-Oil and they have the full range of O-rings in silicone.
    Build Prices .... some mods and builds (not 4 sale) "Nature can be cruel- but we don't have to be."~ Temple Grandin

  13. #13
    Banned Groundhog66's Avatar
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    Default Re: O-rings

    HOLY SMOKE, now I am really confused....;o)

  14. #14
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    Default Re: O-rings

    Cheers PSM, that's a much better idea.

    It was late....

  15. #15
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    Default Re: O-rings

    Info added to the FAQ thread. Good call guys!!!
    There is a type of perfection that transcends the quest for lumens. Buying a $250 1-cell light for "lum factor" is like buying a $250 single malt Scotch for the alcohol content.
    - paulr


    It's always darkest just before it goes pitch black.
    My shoes are too tight. But it doesn't matter, because I have forgotten how to dance.

  16. #16
    Banned Groundhog66's Avatar
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    Default Re: O-rings

    Quote Originally Posted by Kiessling
    Info added to the FAQ thread. Good call guys!!!

    +1

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