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Thread: Tough removal of brass lens

  1. #1
    Jon Wilson's Avatar
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    Tough removal of brass lens

    The brass lens cells on my old petzval are difficult to thread and unthread on and off the brass barrel. The threads are not crossed. What is recommended to help smooth the screwing on and off these lens? Graphite?
    Thank you for your help.
    Jon

  2. #2
    Tin Can's Avatar
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    Re: Tough removal of brass lens

    I have the opposite problem

    Let's use one thread

    Mine is too loose and needs something
    2022

  3. #3
    Jon Wilson's Avatar
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    Re: Tough removal of brass lens

    makes sense. Thanks. Let's hear from all the LF gurus.

  4. #4
    Foamer
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    Re: Tough removal of brass lens

    Try cleaning them with lighter fluid and tissue, then dry. I've put a thin coating of anti seize white grease on all my threads.


    Kent in SD
    Qui sedes ad dexteram Patris,
    miserere nobis.

  5. #5

    Re: Tough removal of brass lens

    Clean the threads with Naphtha and a Q-tip, then dust lightly with graphite, brush off excess.

  6. #6

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    Re: Tough removal of brass lens

    Clean threads with mouse oil and get rid of all dirts. Put a tiny bit of silicone grease.

  7. #7

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    Re: Tough removal of brass lens

    If too loose, put some Teflon tape on the threads

  8. #8
    Tin Can's Avatar
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    Re: Tough removal of brass lens

    Good idea David!

    I am looking for my thin teflon tape, a roll I tested on Instron 52 years ago, it is the best Teflon tape I ever used

    I have many others

    Once used to tighten I hope to never loosen that rare lens again

    Super Glue is the asshole answer, I would need to attach a note to lens to carefully use heat

    or low temp solder....

    I am seeking other answers here and now

    Tomorrow the custom Zimba lensboard for it arrives



    Quote Originally Posted by diversey View Post
    If too loose, put some Teflon tape on the threads
    2022

  9. #9
    Jon Wilson's Avatar
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    Re: Tough removal of brass lens

    Thank you for your great responses. I tried the "Q-tip with lighter fluid" on the threads of my old Leclair Petzval and it worked wonderfully.
    Best to all,
    Jon

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