Post Hole Digger Plans: Tractor Implements  -- Tractor Attachments Implements 3ph Discussion Forum and Review Post Hole Digger Plans: Tractor Implements -- Tractor Attachments Implements 3ph Discussion Forum

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 08-27-2000, 03:27 Post: 19166
Dave Eid



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 Post Hole Digger Plans

Does anyone know of any plans or kits simular to CadPlans for building post hole diggers?Dave






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 08-27-2000, 08:35 Post: 19168
lsheaffer



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 Post Hole Digger Plans

I know of no plans . For what phd's cost(I sell them for $420), I question if they can be built any cheaper. Most people don't have the tools to fabricate the auger, pto shaft, & gear box. There isn't much left to build.






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 08-27-2000, 09:31 Post: 19170
Roger L.



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 Post Hole Digger Plans

Everyonce in awhile I used to see a homebuilt posthole digger made from an automotive rear end. It can be done, but what a lot of work! Most people would still need to buy the PTO fitting, auger, digger point, and teeth....which are a lot of the expense.






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 08-28-2000, 12:31 Post: 19198
greg lenz



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 Post Hole Digger Plans

I am considering building a post hole digger, but rather than use a PTO shaft and gear box, I am thinking of using a hydraulic motor. This would be very simple and inexpensive. Anyone know why that would not work.






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 08-28-2000, 13:08 Post: 19200
Jerri Neese



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 Post Hole Digger Plans

Greg,

No, this should work fine and perhaps be a bit more flexible. However, I do not think it will be any cheaper. Hydraulic motors are not inexpensive, not to mention power beyond valve and additional hoses.

Jerri






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 08-28-2000, 19:10 Post: 19212
Roger L.



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 Post Hole Digger Plans

Greg, you may know all of this, but others might not. Basic hydraulic motors come in gear, vane, and piston types. There are also some rotary piston types and hybrids. All of them have a lot in common with a hydraulic pump running backwards. The gear and vane types are most affordable, but have high run speeds and low starting torque. They are usually used with gearboxes to overcome this difficulty. A posthole digger needs a lot of torque. But if you could pick up one of the fancier hydraulic motors...maybe surplus....it would sure be a nifty installation. A key phrase is "percent of full torque available at start-up". Then compare with a PTO which is 90% of tractor engine torque - sometimes more, it depends on how the manufacturer rated the engine.






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Discussion Boards > Active Subjects > Messages as Posted > Tractor Implements Forum

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