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Thread: Plywood Rings

  1. #1
    Join Date
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    Plywood Rings

    I should make some plywood rings for my duct work 5" snaplock. How do you make them ?
    Hole saw ?
    Compass and saber saw ( jig saw) ?

    Thanks

  2. #2
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    Mike — Not sure exactly what the function of the rings is, but I typically use a plunge router and router jig (trammel arm) to make precise circles or rings.

  3. #3
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    I made a bunch of blast gates, and used a template with a flush trim bit to make the holes. It's easy (but messy) with MDF because you don't have to worry about grain reversal. Plywood should be similar. A spindle sander is handy, too.

  4. #4
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    Fly cutter on a Drill Press (!) (never with a hand-held drill) if you have one that can cut that large or a router on a trammel or using a pattern to cut the inner circle and free-hand cut the outside with a jig saw or band saw.

    If you're using 26 gage or heavier snap-lock, you don't need these, however. If you are using 30 gage HVAC snap lock...yea, you do need them!
    --

    The most expensive tool is the one you buy "cheaply" and often...

  5. #5
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    Cnc router now or jasper jig and plunge router before my cnc.

  6. #6
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    Quote Originally Posted by Jim Becker View Post
    Fly cutter on a Drill Press (!) (never with a hand-held drill) if you have one that can cut that large or a router on a trammel or using a pattern to cut the inner circle and free-hand cut the outside with a jig saw or band saw.

    If you're using 26 gage or heavier snap-lock, you don't need these, however. If you are using 30 gage HVAC snap lock...yea, you do need them!
    Yes, all of that.
    NOW you tell me...

  7. #7
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    Last edited by Mike Burke; 02-26-2018 at 6:40 AM.

  8. #8
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    Quote Originally Posted by Mike Burke View Post
    Thanks, a Fly Cutter ?

    like this

    https://www.amazon.com/Grizzly-H5935.../dp/B0007D2BQG

    Not one of these ? These things scare me.....

    http://www.rockler.com/heavy-duty-ci...yABEgJ81fD_BwE
    Your second link is broken but, that is just a typical circle cutter. Used in a drill press with proper work holding they are very trouble free. That being said, if I were going to make a bunch of 5" cutouts I would use a circle jig and a router. Layout and cut all your circles about 1/4" deep in your material, hrough cut these started cuts with a jigsaw, use the router 1/4" edge to guide a template bit at the router table to finish up.
    "A hen is only an egg's way of making another egg".


    – Samuel Butler

  9. #9
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    I would not use a fly cutter on a 5" hole in plywood even in a drill press.

    I would make template and do it with a router and bushing. Or you could use a circle cutting jig with a router.

  10. #10
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    5" is pretty big. I did some 4" holes in 1 1/8" particle board with a fly cutter in my mini-mill.

    https://www.youtube.com/watch?v=q5OR...ature=youtu.be
    NOW you tell me...

  11. #11
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    Just made 10 of them this afternoon...made a jig to hold my piece of plywood and used my Jasper jig and router. Worked Great !! Thanks for all your help.

  12. #12
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    There ya go! Yea, a Jasper Jig IMO is the best bang for the buck option. I had one before moving to the Micro Fence system.
    If at first you don't succeed, redefine success!

  13. #13
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    Quote Originally Posted by Ben Rivel View Post
    Jasper Jig
    I'm always learning something new here, and it usually costs me money. Mine is now on order.

  14. #14
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    Dave - The jasper jigs are worth the purchase price. I have two of them and use them frequently.

  15. #15
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    And for what its worth they have told me in the past that they were going to be coming out with a new version that works with Festool routers, but they sure are taking their sweet time about it.
    If at first you don't succeed, redefine success!

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