Page 1 of 3 123 LastLast
Results 1 to 10 of 28
  1. #1
    Platinum Member PHPaul's Avatar
    Join Date
    Feb 2011
    Posts
    608
    Location
    Downeast Maine
    Tractor
    Kubota B2650 with cab, Pasquali 986

    Default Goldberg's the name...Rube Goldberg...



    I've been wanting a way to trim ditches and under trees.

    Sicklebar and disc mowers are just stupid expensive and it doesn't make any sense to spend four or five grand on something you'll use for 2 hours twice a year, if that.

    They sell a commercial version of a 3 point hitch mounted string trimmer for compact tractors, but it's $1000 plus shipping and taxes, again more than I wanted to spend.

    Being a serious packrat, I had most of what I needed to make my own. I had the gearbox, the trimmer head, the PTO shaft and most of the steel. Plus, it's a major hobby of mine, making my own equipment whenever practical.

    I've got about $200 or $250 in it with pulleys, bearings, belts, shafts and what extra steel I had to buy.

    I'm pleased with how well the Mark I works. I do have a couple of modifications in mind tho. I originally designed it to work on my Pasquali but between the articulation and slop in the hitch, it was nearly impossible to put the string head where you wanted it and keep it there. Works MUCH better on the Cabota. Not to mention power steering, air conditioning and cup holders...

    The Pasquali has a 750 RPM PTO and I sized the pulleys to provide ~3000 RPM at the string head based on that.

    The Cabota has a 540 of course. Add to that the fact that I'm running 18" of string (36" doubled over on both attachment points) and I'm running into a little issue with the string folding back in the heavy stuff. I've re-ordered pulleys to speed the string head up and I think that'll take care of it. I can always take smaller bites and just creep along in low range too.

    I also need to fashion some sort of guard over at least the final drive belt. Big stuff like goldenrod tends to get under the belt and flip it off occasionally. Plus OSHA of course...

  2. #2
    Super Member George2615's Avatar
    Join Date
    Feb 2005
    Posts
    7,686
    Location
    Central Square, NY
    Tractor
    LS XR3037HC

    Default Re: Goldberg's the name...Rube Goldberg...

    Necessity is the mother of invention. Great job PHPaul.

  3. #3
    Elite Member CobyRupert's Avatar
    Join Date
    Oct 2012
    Posts
    3,088
    Location
    Washington County, NY
    Tractor
    JD 5075E

    Default Re: Goldberg's the name...Rube Goldberg...

    18" of string.

    That thing must sing!
    JD5075E, Frontier RC2084 Rotary Cutter, Wallenstein FX65 Skidding Winch

  4. #4
    Veteran Member
    Join Date
    Jul 2010
    Posts
    2,310
    Location
    Pacific Northwest

    Default Re: Goldberg's the name...Rube Goldberg...

    Nice, Mark II should have tilt function
    2007 Kubota L3130, LA723 FEL
    Land Pride FDR1672 rear finish mower, Frontier RB1172, Koyker KB60 BH
    Pallet forks, Golf cart canopy bolted to ROPS, 9" & 12" PHD
    2016 Ferris IS700Z 52" Briggs 27hp commercial turf series

  5. #5
    Platinum Member Mendonsy's Avatar
    Join Date
    Nov 2012
    Posts
    818
    Location
    Mendon, NY
    Tractor
    Kubota B7500HST

    Default Re: Goldberg's the name...Rube Goldberg...

    I like it!!
    Doesn't your kubota have a 960 rpm rear PTO setting also?? Mine has both.
    It seems like that thing should fling weeds everywhere, but I guess as long as you are hidden in the cab it wouldn't matter.

  6. #6
    Platinum Member PHPaul's Avatar
    Join Date
    Feb 2011
    Posts
    608
    Location
    Downeast Maine
    Tractor
    Kubota B2650 with cab, Pasquali 986

    Default Re: Goldberg's the name...Rube Goldberg...

    Quote Originally Posted by CobyRupert View Post
    18" of string.

    That thing must sing!
    She does whistle a mite!

  7. #7
    Platinum Member PHPaul's Avatar
    Join Date
    Feb 2011
    Posts
    608
    Location
    Downeast Maine
    Tractor
    Kubota B2650 with cab, Pasquali 986

    Default Re: Goldberg's the name...Rube Goldberg...

    Quote Originally Posted by hawkeye08 View Post
    Nice, Mark II should have tilt function
    I spent a lot of time trying to noodle out a way to do that and couldn't come up with anything that fit my budget. If I could afford a pump and a hydraulic motor, it'd be pretty straight forward.

    I suppose top 'n tilt on the hitch would work to a certain extent before I ran out of flex on the PTO shaft.

  8. #8
    Platinum Member PHPaul's Avatar
    Join Date
    Feb 2011
    Posts
    608
    Location
    Downeast Maine
    Tractor
    Kubota B2650 with cab, Pasquali 986

    Default Re: Goldberg's the name...Rube Goldberg...

    Quote Originally Posted by Mendonsy View Post
    I like it!!
    Doesn't your kubota have a 960 rpm rear PTO setting also?? Mine has both.
    It seems like that thing should fling weeds everywhere, but I guess as long as you are hidden in the cab it wouldn't matter.
    Nope, 540 only on the rear. With the engine firewalled, close to 600, but that's it.

    It does throw crap pretty hard, I may fashion a guard around the string head at some point. For now, it's easier to just wash the winders on the cab when I'm done...

  9. #9
    Gold Member
    Join Date
    Jun 2017
    Posts
    497
    Location
    West Chester
    Tractor
    Mahindra 2540

    Default Re: Goldberg's the name...Rube Goldberg...

    Quote Originally Posted by Mendonsy View Post
    I like it!!
    Doesn't your kubota have a 960 rpm rear PTO setting also?? Mine has both.
    It seems like that thing should fling weeds everywhere, but I guess as long as you are hidden in the cab it wouldn't matter.
    Actually, it appears to be a Cabela tractor (which may be a TYM, as are some Mahindra models). Definitely not a Kubota!

  10. #10
    Super Member teg's Avatar
    Join Date
    Jul 2005
    Posts
    5,461
    Location
    Raleigh, NC Hillsville, VA
    Tractor
    L2800 - HST

    Default Re: Goldberg's the name...Rube Goldberg...

    Great job.... Can you post more photos up close?

Page 1 of 3 123 LastLast

Similar Threads

  1. Rube Goldberg is alive and well--in Russia
    By bcp in forum Build-It Yourself
    Replies: 2
    Last Post: 04-05-2013, 09:06 PM
  2. Improvised Rigs or Rube Goldbergs
    By /pine in forum Rural Living
    Replies: 11
    Last Post: 03-26-2013, 10:55 AM
  3. My Rube Gold-BORG sprayer's latest mods
    By mjncad in forum Customization
    Replies: 7
    Last Post: 01-02-2010, 02:22 AM
  4. Rube Goldberg
    By CBB in forum Kioti Owning/Operating
    Replies: 8
    Last Post: 02-07-2007, 02:51 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2017 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.