Stump Drilli/Stump Planer--Anyone use this?

[npalen]

http://augertorqueusa.com/_images/ProductSpecifier-Mixer-Bowl.pdf
https://www.youtube.com/watch?v=S_zcuiDTUVU

Wondering if any of you guys have experience with this method of removing stumps? Looks like it would be of use where the stump needs to be removed a couple feet below grade.

 

[bcp]

I believe that would spin my tractor around.

Those are the smallest I've seen. There were some videos posted of some that looked about 2-3 feet diameter, that really rocked a large tractor.

Bruce

 

[JJZ 109]

I could use one of those to get rid of about 30 dead elms. Unfortunately I'm not aware of any of the local rental yards having such a thing. I'm sure it would be cost prohibitive to buy one to clear a lot one time and then have it sit forever.

 

[the whispering oaks farm]

that looks interesting, I wonder if it would work on a 3 pt. post hole digger? Some of my stumps I would like to just get them below grade. It wouldn't have to be all that deep. I am going to e-mail them about it.

 

[npalen]

https://www.youtube.com/watch?v=qU9_0AcgTHk
This video may show the concept a bit better. The smaller drill, which requires a much less rigid support, is used to take out a series of overlapping cuts. I'm sure they are demonstrating this on an above ground stump as it would be difficult to see below ground level.
I'm thinking in terms of replacing the PTO input on my PHD (post hole drill) with a 10:1 gearbox with a hydraulic motor attached. I'm seeing about 20 RPM output based on 5 GPM input to a 2.8 cu.in. motor. My concern is how much down pressure is needed and may require a downforce cylinder. It looks like about 1200 ft lbs of torque would be generated at 2000 PSI to the motor. I'm concerned also with whether the PHD frame can withstand that much torque.

 

[jones6780]

Would the point "wood screw thread" actually pull the cutter down into the stump? I think RPM would need to be very slow for a 3ph type.

 

[npalen]

Would the point "wood screw thread" actually pull the cutter down into the stump? I think RPM would need to be very slow for a 3ph type.

Additional down pressure is required.

 

[Guesseral]

It must take one He!! of a tractor to power that or at least one of the larger ones. Wouldn't you have to have reverse on the PTO to get it out of the tree once you were done?

 

[BukitCase]

That problem would be negated by going hydraulic (reversible hyd. motor) -

Now, Npalen - do you really think your 1600 pound tractor won't need a couple of 12000 pounders lashed to it so the auger turns instead of the Bota? ...Steve

 

[npalen]

That problem would be negated by going hydraulic (reversible hyd. motor) -

Now, Npalen - do you really think your 1600 pound tractor won't need a couple of 12000 pounders lashed to it so the auger turns instead of the Bota? ...Steve

Not really. The 1200 ft. lbs. of torque on the drill would result in only about 150 lbs sideload at the center of the tractor mass. (assuming center of tractor mass is about 8 ft. from the torque being applied. I'm concerned whether the PHD frame and it's connection with the auger gearbox will absorb the torque. May have to add some beef.