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Help with grizzly bar size/spacing.

Discussion in 'Screen/Wash Plants' started by nedly05, Nov 1, 2014.

  1. nedly05

    nedly05 Senior Member

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    I'm building a small grizzly to use with my compact equipment, mainly to seperate materials on site. I am wondering what to use for grizzly bars. I was thinking 2x2 square tube 3" on center. Then to keep cost down I was considering 1/2" rebar, but Im afraid it will wear out much sooner and be more expensive in the long run. I have a screen thats 4x8 (can be seen in the pic) that I was going to use for part of it but I think I would rather have it all one piece. I have looked online and see that screen is very expensive. Any insight as to what would work best? Thanks!!

    There will be 2 additional uprights and crossbars equally spaced to the front and rear of the center one. The shop is definitely due for a cleaning too!
     

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  2. grandpa

    grandpa Senior Member

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  3. nedly05

    nedly05 Senior Member

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    Holy crap grandpa, those are some huge bars! This one is underbuilt to use with anything other than the 5 ton mini and track skiddy. I have a full size one in the pit, but I wanted something to be able to use on site and move easily.
     
  4. JDOFMEMI

    JDOFMEMI Senior Member

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    Even for your small machines, it looks like you will be limited to very light duty.

    I would recommend against the square tube for bars. They will bend very easily. For the size you have, maybe think about 1/2" X 3" bars.

    If you have any contacts at a gravel pit? Maybe you could get some of their old scalping screens. It does not have to be one piece, just connect it with a good flat plate in the middle.
     
  5. overworked

    overworked Senior Member

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    I agree with Jerry, tube will dent and bend, than stuff will start to stick,
     
  6. clintm

    clintm Senior Member

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    rebar would last longer than tubing
     
  7. nedly05

    nedly05 Senior Member

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    What size do you think? 3/4"?
     
  8. clintm

    clintm Senior Member

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    it would probley work but if you can get some 1" I would rather use it if you have to buy it I would look at priceing some flat bar something like 1/2x3" or 3/4 x3 or 4 .but if you are using compact machines you will have to watch the weight so you can still pick it up
     
  9. clintm

    clintm Senior Member

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    another idea would be to use your 3/4" rebar and put tubing on something like every other 1 or 2nd or 3rd with rebar welded on top of it that way it would help support any impact from large pieces that falls on it
     
  10. Scrub Puller

    Scrub Puller Senior Member

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    Yair . . . we found heavy wall box section welded diamond wise worked pretty good.

    Cheers.
     
  11. JDOFMEMI

    JDOFMEMI Senior Member

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    I would look for heavy wall pipe, or better yet, used drill steel from a small rock drill. Check with any blasters in the area and see if they can sell you broken steel.

    Rebar, with its ridges, helps material to cling instead of sliding off cleanly.

    Scrubs idea works too, and it sounds like you may already have the box tube.
     
  12. nedly05

    nedly05 Senior Member

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    Thanks for all of the info and ideas guys! I only have enough box steel to finish the frame. I had thought about the ridges on the rebar catching stuff, but for some reason rebar seems to be cheaper than round stock. I dont want to cut cost and have it not work well though. I tried to make it steeper to help the material roll off. I like the really like the drill steel idea, but there arent any blasters that close by.
     
  13. Colorado Digger

    Colorado Digger Senior Member

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    Nedly, Looks like you are going to have to beef that invention up a bit. Not trying to be negative.. the one we have for the compact's is much heavier duty. I will get a few fotos and shoot them over to you.

    Good Luck, CD
     
  14. nedly05

    nedly05 Senior Member

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    Thanks CD. Its not done yet, actually I havent worked on it since the pics were taken. Theres more steel to go in, and likely some 45* gussets. I'm at a standstill as I cant decide what to use for bars. I'd love to see the pics of yours, hopefully it will give me some ideas to move forward! No negativity taken, thanks for your help!!!
     
  15. Buck123

    Buck123 Member

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    20x50mm flat works nice for most purposes, similar to grandpa's grizzly.
     
  16. ol'stonebreaker

    ol'stonebreaker Senior Member

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    Nedly, I just joined. I didn't see where you stated the max size of material going across the grizzly.
    Mike
     
  17. cdm123

    cdm123 Senior Member

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    I built a grizzly out of 5/8 rebar on a home made screener a few years ago, it looks like a bag of pretzels now you need some thing stronger.
     
  18. millercross3

    millercross3 Well-Known Member

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    Oil pipe one I made. May not be pretty, but it sure works nice! DSC00916.JPG
     
  19. cdm123

    cdm123 Senior Member

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    What size and wall pipe? how large are the rocks?
     
  20. Scrub Puller

    Scrub Puller Senior Member

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    Yair . . .

    millercross3's design is obviously purpose built for a specific job.

    The horizontal ground level bars could be a pain in some applications, I always made them so you could clean out on three sides with a bucket

    Cheers.
     
    Last edited: May 31, 2015