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Thread: another vacuum chuck system

  1. #1
    Join Date
    Apr 2007
    Location
    Decatur, Illinois
    Posts
    177

    another vacuum chuck system

    i finally finished rounding up parts for a simplest version of a vacuum chuck system for my nova lathe. thanks to steve schlumpf for his detailed explanation on the entire process @ http://familywoodworking.org/forums/...ead.php?t=7984 and to stu ablett for a look at the chuck itself @ http://familywoodworking.org/forums/...ead.php?t=8750. anyone should be able to build one of these by reading those threads.
    my deviations were for the sake of simplicity so they may not be inviting to others. for instance i'm just using one filter right before the pump to catch anything that enters the system. there are no wheels on the system yet even though i bought two. maybe add them later if i get tired of lifting it.
    a few pics..plywood was rough but what i had in the shop that was the right size:
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    the silencer screws right into the outlet of the vac pump eliminating lines. i didn't like the light gauge wiring that came with the pump as my 220v circuit is on 20 amp breakers so i wired 12 gage cable right into the pump. a single coat hook on the back side provides storage for the vacuum line and the power cable.

    i've only made the 2.5" chuck but will add two larger chucks soon. i worried that the threaded 8/4 birch chuck might not seal well on the spindle so i added an oring to the inboard end of the spindle and cut a counterbore in the mating side of the chuck so that the oring is compressed as the chuck is seated. the oring is hard to see in the photo and i may decide it's overkill.
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    so i tested the unit..covering the end of the adapter before attaching to the lathe registered 25.5 in. Hg. and plugged into the lathe, chuck in place with a flat board across the chuck registered a little ove 21 in. Hg.
    Last edited by Clark O'Neill; 04-03-2008 at 12:01 AM.
    99% of lawyers give the rest a bad name...Steven Wright.

  2. #2
    Join Date
    Oct 2006
    Location
    Tokyo Japan
    Posts
    15,807
    Looks good Clark, what are you using to seal the plastic pipe part of your chuck to the flat piece of wood?

    Cheers!
    The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
    William Arthur Ward

  3. #3
    Join Date
    Apr 2007
    Location
    Decatur, Illinois
    Posts
    177
    well stu, i followed your post and used 3 min. epoxy. i did prep the pvc pipe with an alcohol rub just to make sure it was squeaky clean. on this small dia tube i was able to cut a groove in the wooden chuck that fit the tubing very tightly. so when i spread epoxy along the groove and pressed the tube in place the epoxy overflowed just enough on the I.D. that i was confident it made a good vacuum seal as well as a mechanical joint. i have not added silicone sealer (yet?). the larger chucks will probably just have the O.D. of the wooden chuck turned to fit the I.D. of the tubes as you and others have posted.
    99% of lawyers give the rest a bad name...Steven Wright.

  4. #4
    Join Date
    Oct 2007
    Location
    Harvey, Michigan
    Posts
    687
    Clark - Great job! Have fun with your new system!
    Steve

  5. #5
    Join Date
    Oct 2006
    Location
    ABQ NM
    Posts
    30,020
    Looks good, Clark. You're gonna love having the vac system.
    When the going gets weird, the weird turn pro. - Hunter S. Thompson
    When the weird get going, they start their own forum. - Vaughn McMillan

    workingwoods.com

  6. #6
    Join Date
    Dec 2006
    Location
    Goodland, Kansas
    Posts
    4,834
    Great looking project Clark. Well done.
    Bernie W.

    Retirement: Thats when you return from work one day
    and say, Hi, Honey, Im home forever.

    To succeed in life, you need three things: a wishbone, a backbone and a funnybone.

  7. #7
    Join Date
    Dec 2006
    Location
    San Antonio, Texas
    Posts
    765
    I'm jealous! 'Cause I want one too.

    So little time and so much to do.
    Billy B.

    "It has been said that politics is the second oldest profession. I have learned that it bears a striking resemblance to the first." - Ronald Reagan

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