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Ideas for making a ~20" dia flat ring of flat aluminum?

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  • jkilroy
    replied
    Cutting them from flat plate sounds like the fast and easy, therefore cheap in the long run, solution.

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  • gellfex
    replied
    Originally posted by winchman
    At only two pounds each, it seems like the lazy susan bearing would be lighter than the V-groove bearings and the structure needed to support them rigidly enough to work well.

    Product Specifications

    Product Name: Aluminum Lazy Susan Platform - 20
    Manufacturer Name: Johnson-Rose Corp.
    Product ID: JR9660
    Dimension (L x W x H): 20 x N/A xN/A
    Shipping Weight: 5 lbs.
    Product Weight: 2 lbs.


    Roger
    Those V bearings can be small as 3/4", so added to 2 1/8 rings it'd be roughly 2lbs. you could be right anyway since buying off the shelf is MUCH easier!

    The weight for the similar item from McMaster was 4.5 lb. Could they have quoted the shipping weight?

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  • winchman
    replied
    At only two pounds each, it seems like the lazy susan bearing would be lighter than the V-groove bearings and the structure needed to support them rigidly enough to work well.

    Product Specifications

    Product Name: Aluminum Lazy Susan Platform - 20
    Manufacturer Name: Johnson-Rose Corp.
    Product ID: JR9660
    Dimension (L x W x H): 20 x N/A xN/A
    Shipping Weight: 5 lbs.
    Product Weight: 2 lbs.


    Roger

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  • gellfex
    replied
    Thanks for all the great ideas!!!

    Yeah, laser or water cutting flat sheet seems the way to go. Winchman, those ring bearings are relatively heavy, between 4.5 and 7.5 lb depending on dia. This is for a theatrical novelty costume skirt like a tutu, even 4lb is a bit much. The rings held together with 4 "V-groove" bearings would be pretty light. A V-groove bearing has a groove around the outside so you can trap a track between a pair of them.

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  • Rich Carlstedt
    replied
    I think you are way over pricing your raw material
    70 bucks for 1/8 thick 2 x 2 6061 sheet is outrageous.

    Go here


    For one piece, its little more than half your price ( 43).


    If you are paranoid over cost, ( as I am sometimes, depending on use)
    just go to your local junk/recycle yard.
    I have bought Aluminum plate in great shape ( New sometimes) for a little (2x) over scrap price as they deserve a profit

    I bought a 3/4 6061 plate two years ago for 1/4 price new

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  • Circlip
    replied
    Sorry to differ Sir John, for flat Alumin rings go for waterjet cut, NO heat stress at all.

    Regards Ian.

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  • lenord
    replied
    Google up Inca Corp. and get an call/e-mail to George Roberts.

    24,17 and 10" bearings

    You can get 1" thik Mic6 drops up to 18.750 or 18.625" (?) OD from sandsmachine.com too. They have other round drops too. They make a large OD bearing.

    Lenord

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  • winchman
    replied
    What exactly is a "V-groove bearing truck"?

    What does the structure look like below and above the bearing?

    Why not something like these? http://store.workshopsupply.com/cata...oducts_id=2604

    This one's actually the right size: http://www.instawares.com/aluminum-l...jr9660.0.7.htm



    You get three for $75 with free shipping.

    Roger
    Last edited by winchman; 10-30-2009, 10:14 AM.

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  • Black_Moons
    replied
    Left handed drill bit says anti-wut?

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  • Evan
    replied
    A lower cost option: I think STOP signs are about 1/8" thick and made of aluminum.
    Yeah, but they are fastened with those pesky anti tamper screws...

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  • gda
    replied
    Another vote for starting with flat plate and keeping it flat.

    If you need it REALLY flat you can use Jig Plate. I priced some out this week: $931 for a 1/4" THK 4' X 8' sheet!

    A lower cost option: I think STOP signs are about 1/8" thick and made of aluminum.

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  • Evan
    replied
    Perhaps a 20" aluminum bicycle rim would be of some use? Many have walls that range from 1/2 to 3/4" wide and are perpendicular to the axle. You can probably pick some up for nothing or close to it at a local bicycle repair shop or a yard sale.

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  • Black_Moons
    replied
    I wonder what the wall thickness 20" steel pipe comes in.
    Of course, getting a straight cutoff would be quite the challange.. likey needing a few passes on a surface grinder or somesuch.

    Alternatly what you do is buy the 2x2' bits of plate, very carefuly cut the biggest ID hole you can and save the nice round chunk of plate for the next time you need 19" lazy susans... or err, something else. you know a 19" round will be usable for something along the way, even if its only 1/2 usable due to the weird shape.. but maybe you'll find you NEED it round and use 90%+ of it.
    Last edited by Black_Moons; 10-29-2009, 08:24 PM.

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  • John Stevenson
    replied
    Get it laser cut.
    Welding will distort and cause problems as will rolling.

    If you want it flat, start with flat.

    .

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  • Black_Moons
    replied
    How about taking a commerical lazy suzan and choping/grinding/cutting the center and everything else out? (assumeing you don't need it to stay togethor on its own)

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