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Thread: screw or bolts?

  1. #1

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    screw or bolts?

    What the accepted practice for mounting barrel flanges? #6 Screws seem to hold pretty well (hexanon GRII 210) but should I use through bolts and nuts? Hate to watch it go skittering down a ravine...Thanks

    -oops, meant to go in regular LF forum, sorry..

  2. #2
    David H. Bebbington's Avatar
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    I very often use pop rivets - they don't loosen accidentally but can easily be removed if desired.

    Regards,

    David

  3. #3

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    Colin,
    The screws will work fine if the screwholes haven't been enlarged or stripped out. I think you're more likely to lose the entire lensboard than have the lens/flange fall off.
    Heavily sedated for your protection.

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    Thanks John, that's kind of what I was thinking...David, using the rivets, do you have to drill them out to remove them or is this a different sort of rivet? Thanks

  5. #5

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    Quote Originally Posted by Colin Graham View Post
    What the accepted practice for mounting barrel flanges? #6 Screws seem to hold pretty well (hexanon GRII 210) but should I use through bolts and nuts? Hate to watch it go skittering down a ravine...Thanks

    -oops, meant to go in regular LF forum, sorry..
    Screws are traditional and I have never heard of a flange falling off (I've been doing this 40 years and around woodies for 35 of them). I'd never even considered bolts, even with my 21 inch f/7.7 Ross, maybe 5 inches in diameter and seven inches long.

    Cheers,

    R.

  6. #6
    David H. Bebbington's Avatar
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    Quote Originally Posted by Colin Graham View Post
    Thanks John, that's kind of what I was thinking...David, using the rivets, do you have to drill them out to remove them or is this a different sort of rivet? Thanks
    I should mention that I use pop rivets with metal panels only. The size I use is 1/8" diameter - after fitting, the place where the break-off pin was provides a secure start for a 1/8" twist drill if you need to remove the rivets again. You can do this several times without enlarging the holes in the panel!

    With wooden panels, I would agree with others that wood screws are likely to be more than adequate.

    Regards,

    David

  7. #7
    noseoil's Avatar
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    Even if a #6 screw is stripped, it is easy enough to drill and tap to the next size of #8. The APO Nikkor 480mm I use with a packard shutter is a fairly hefty lens for the old B&J 8x10, but the #6 screws are still fine and will be the least of my problems. Soft metals are usually what these rings are made from, so drilling and tapping is a good alternative to discarding a perfectly good mounting flange. tim

  8. #8
    Jim Noel's Avatar
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    I use screws on wooden boards and bolts and nuts for metal ones.
    [FONT=Comic Sans MS]Films NOT Dead - Just getting fixed![/FONT]

  9. #9
    Shawn Dougherty's Avatar
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    I have the APO Nikkor 480 that tim mentioned and I have it attached with bolts. It cost about $1 and makes me feel better... Plus, I found bolts that fit perfectly so there are no allterations to make, a little lock tight and I haven't thought about it until now. Good luck. Shawn



 

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