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  1. #1
    Bronze Member IvanS's Avatar
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    Mar 2004
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    Lebanon, TN
    Tractor
    B3300SU TLB

    Default Another DIY Grapple

    Tittle pretty well says it all. This is a brush grapple that I've been working on the last couple of weekends. Ready for paint and hydraulics. Made from primarily 3/8" bar stock and sized to fit my kubota B3300SU - 48" wide and weighs around #300 by my calculations. My LA504 loader has the Kubota quick attach system and this is designed to work with that. Sorry for the terrible picture quality, will get some better photos later this week.

    I couldn't resist the temptation to have the logo water jet cut into the front plate. It wasn't very expensive - hope Kubota doesn't mind
    Attached Thumbnails Attached Thumbnails Another DIY Grapple-2013-03-11_06-34-40_541-a   Another DIY Grapple-2013-03-11_06-34-57_656-a  
    Kubota B3300SU TLB, F2260 Mower, RTV-X1120D, Home Made Grapple, 60" Tiller, BoxBlade, Landscape Rake, Pallet Forks,etc.

  2. #2
    Member
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    Aug 2010
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    31
    Location
    Michigan
    Tractor
    Kioti LK2554

    Default Re: Another DIY Grapple

    Looks sweet

  3. #3
    Platinum Member adirondackmtnman's Avatar
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    Jul 2012
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    873
    Location
    Black Brook, NY
    Tractor
    JD 5045D

    Default Re: Another DIY Grapple

    NICE!!!
    "Speak softly and carry a big stick; you will go far." ~Theodore Roosevelt

  4. #4
    Super Star Member ovrszd's Avatar
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    May 2006
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    10,551
    Location
    Missouri
    Tractor
    Kubota M9540, Ford 3910FWD, JD2210

    Default Re: Another DIY Grapple

    Great workmanship. Love the logo.

    Is that a 2" cylinder, hard to tell in photos?? You may want to consider some trussing on the claw. My 2" cylinder bent 1/2x4" flat bar that is trussed. When it'll bend is when one side of the claw is gripping a larger item than the other side. All that twist is concentrated in the claw design and adds stress in wierd places. Easier to fix now than have to straighten and reinforce after it's bent. Keep in mind the grapple's power to clamp is determined by the tractor's hydraulic capacity, not by the tractor's size or lift capacity. So in practical use your tractor can clamp just as tight as my M9540, just maybe not as quickly.

    Another issue is that you need something to protect the cylinder. For example, if you clamped onto a stump that would fit in the "V" shaped hole under the cylinder you have a high chance of bending the cylinder.

    Again, great job, looks great!!!
    Richard

    "Happiness isn't having everything you want, it's wanting everything you have."

  5. #5
    Veteran Member
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    Sep 2009
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    2,179
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    Up State S.C.
    Tractor
    AC WD 34 hp/3500 lbs MF 261 60 hp/5380 lbs

    Default Re: Another DIY Grapple

    Beautiful workmanship. Reminds me of how much I miss BattleBots.

  6. #6
    Bronze Member IvanS's Avatar
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    Mar 2004
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    Location
    Lebanon, TN
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    B3300SU TLB

    Default Re: Another DIY Grapple

    Quote Originally Posted by ovrszd View Post
    Great workmanship. Love the logo.

    Is that a 2" cylinder, hard to tell in photos?? You may want to consider some trussing on the claw. My 2" cylinder bent 1/2x4" flat bar that is trussed. When it'll bend is when one side of the claw is gripping a larger item than the other side. All that twist is concentrated in the claw design and adds stress in wierd places. Easier to fix now than have to straighten and reinforce after it's bent. Keep in mind the grapple's power to clamp is determined by the tractor's hydraulic capacity, not by the tractor's size or lift capacity. So in practical use your tractor can clamp just as tight as my M9540, just maybe not as quickly.

    Another issue is that you need something to protect the cylinder. For example, if you clamped onto a stump that would fit in the "V" shaped hole under the cylinder you have a high chance of bending the cylinder.

    Again, great job, looks great!!!

    You are correct, 2" cylinder and I am going to add some gussets to the side arms of the claw as you suggested. Had not thought about the cylinders expose from underneath; I will consider that before painting. Thanks for the compliment.
    Kubota B3300SU TLB, F2260 Mower, RTV-X1120D, Home Made Grapple, 60" Tiller, BoxBlade, Landscape Rake, Pallet Forks,etc.

  7. #7
    Bronze Member IvanS's Avatar
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    Mar 2004
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    87
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    Lebanon, TN
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    B3300SU TLB

    Default Re: Another DIY Grapple

    Quote Originally Posted by stuckmotor View Post
    Beautiful workmanship. Reminds me of how much I miss BattleBots.
    That's exactly what my son mentioned while I was building it.
    Kubota B3300SU TLB, F2260 Mower, RTV-X1120D, Home Made Grapple, 60" Tiller, BoxBlade, Landscape Rake, Pallet Forks,etc.

  8. #8
    Super Star Member ovrszd's Avatar
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    May 2006
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    10,551
    Location
    Missouri
    Tractor
    Kubota M9540, Ford 3910FWD, JD2210

    Default Re: Another DIY Grapple

    Quote Originally Posted by IvanS View Post
    You are correct, 2" cylinder and I am going to add some gussets to the side arms of the claw as you suggested. Had not thought about the cylinders expose from underneath; I will consider that before painting. Thanks for the compliment.
    Not trying to hijack your thread, just demonstrating a point with pictures. See how my right set of claws is only gripping with one tooth. The outer, far right tooth isn't doing anything. When loaded like that the force of the hydraulics has to be distributed across the claw structure or it will twist it. Also in these photos you can see how I protected my cylinders with a shield.

    Again, great project. Good for the Soul isn't it??



    Richard

    "Happiness isn't having everything you want, it's wanting everything you have."

  9. #9
    Bronze Member IvanS's Avatar
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    Mar 2004
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    87
    Location
    Lebanon, TN
    Tractor
    B3300SU TLB

    Default Re: Another DIY Grapple

    Got some better pictures this morning:







    Looking for a local source for sandblasting before I paint, hope that will lead to longer paint life.
    Kubota B3300SU TLB, F2260 Mower, RTV-X1120D, Home Made Grapple, 60" Tiller, BoxBlade, Landscape Rake, Pallet Forks,etc.

  10. #10
    Super Star Member ovrszd's Avatar
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    Missouri
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    Kubota M9540, Ford 3910FWD, JD2210

    Default Re: Another DIY Grapple

    Lookin Good!!! Don't spend too much time and money on paint. You're gonna scrape it all off anyway!!!
    Richard

    "Happiness isn't having everything you want, it's wanting everything you have."

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