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  1. #41
    Murray@uptowngallery's Avatar
    Join Date
    Sep 2003
    Location
    Holland, MI
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    Pinhole
    Posts
    1,028
    I like Ole's ancient hand drill method.

    It has TWO levels of safety factor...the slow speed and the requirement to mount it because the drill requires two hands, thus you don't have it turn into your flesh if the bit grabs.

    Now I am assuming one safely mounts the board to a safe work surface and doesn't hold it between ones knees!

    If I didn't mention it previously, I measure the desired diameter with a digital caliper, visually set the flycutter bit to the caliper spacing, make a test drill partway thru a scrap piece of target lensboard material and recheck the measurement/adjust as desired.

    This also gives me a preview of any blade cutting clearance (is that called kerf like wit a table saw blade?)...in other words, it reduces the number of surprises and vocal outbursts.
    Murray

  2. #42
    barryjyoung's Avatar
    Join Date
    Jul 2005
    Location
    Near Seattle WA, USA
    Shooter
    ULarge Format
    Posts
    411
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    2
    I mount the lensboard in a four jaw chuck in the metal lathe. Next cut a hole just under what you need with a hole saw. Finally finish with a boring bar. This is the correct way to do the job.
    Barry Young
    Young Camera Company

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