J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
Would this motor work for a stump grinder
- Thread starter woodlandfarms
- Start date
- Views: 13093
sandman2234
Super Member
- Joined
- Dec 4, 2005
- Messages
- 6,008
- Location
- Jacksonville, Florida
- Tractor
- JD2555 and a few Allis Chalmers and now one Kubota
Thanks J_J, I appreciate the pictures.
David from jax
David from jax
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
woodlandfarms said:
Carl, I punched in some figures into the hydraulic calculator.
With 18 GPM, and a 4 cu in motor, rpm's = 1040 and torque 1911 in lbs
With 18 GPM, , and 15 cu in motor, rpm's = 277 and torque 7166 in lbs
sandman2234
Super Member
- Joined
- Dec 4, 2005
- Messages
- 6,008
- Location
- Jacksonville, Florida
- Tractor
- JD2555 and a few Allis Chalmers and now one Kubota
Here is some information about the Jacobsen drive motors that may allow someone to determine if they are useable in your endeavors.
First, they are direct drive to each wheel. The wheel bolts onto a hub, so a sheave could be used with that same bolt pattern to drive a v-belt.
They are supposed to be made by Parker Hannisin and Textron's part number is 390852.
The machine weighs 2430 without an operator, will mow 0-6mph, transport speeds are 0-10mph, reverse is 0-3 mph. The tires are 24x13-12nhs and stand right at 22.25 inches. I didn't check the air pressure, so they might stand a little more, not much. The diesel engine powering the pumps is rated at 26 hp.
Hopefully someone will be able to tell us if the drive motors will work or not and approximately the cubic inches/ rpm of them. Actually, rpm should be easy enough, but I am late, just thought I would put this info on the board for your consideration.
David from jax
First, they are direct drive to each wheel. The wheel bolts onto a hub, so a sheave could be used with that same bolt pattern to drive a v-belt.
They are supposed to be made by Parker Hannisin and Textron's part number is 390852.
The machine weighs 2430 without an operator, will mow 0-6mph, transport speeds are 0-10mph, reverse is 0-3 mph. The tires are 24x13-12nhs and stand right at 22.25 inches. I didn't check the air pressure, so they might stand a little more, not much. The diesel engine powering the pumps is rated at 26 hp.
Hopefully someone will be able to tell us if the drive motors will work or not and approximately the cubic inches/ rpm of them. Actually, rpm should be easy enough, but I am late, just thought I would put this info on the board for your consideration.
David from jax
OP
woodlandfarms
Super Member
- Joined
- Jul 31, 2006
- Messages
- 6,137
- Location
- Los Angeles / SW Washington
- Tractor
- PowerTrac 1850, Kubota RTV x900
OK.. I am really missing something. First, I am thinking that the RPM on a stump grinder is going to be higher than 100 RPM.. In a pulley system, I get how I can get how I can convert this up to a higher RPM, but on a direct drive, I don't get it. Are both you you (JJ And David) speaking about using a pulley system with wheel motors. Or are you saying buy a wheel motor and put more juice to it?
But all the information you are giving me is great and I am sure appreciated by others... I know I am sure learning a heck of a lot.
Carl
But all the information you are giving me is great and I am sure appreciated by others... I know I am sure learning a heck of a lot.
Carl
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,952
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
woodlandfarms said:
Carl, If you are talking about pulleys, then you want straight shaft hyd motors. I believe that in the above calculations, you are producing about 31 hp from the hyd motors. The little stump grinders will get the job done with high rpm, but they lack the guts to chew a stump up in a reasonable time.
Bigger is better is this situation. A large unit just has more guts. If you can get a wheel motor at the price you want, and the cu in are right, then you need to decide on the blade diameter, and the number of teeth, and type of teeth.
OP
woodlandfarms
Super Member
- Joined
- Jul 31, 2006
- Messages
- 6,137
- Location
- Los Angeles / SW Washington
- Tractor
- PowerTrac 1850, Kubota RTV x900
Thanks JJ. I think I am missing something here...
I am thinking of throwing between a 24 and a 30" chunk of steel with 16 to 24 teeth on it for a direct drive...
If I go with Pulley I probably will pick up that blade set that David pointed me to.... From Praxis...
Direct drive looks easier to construct for my skill level, and the PT is built that way, but there are some legit concerns about survivability (I know Ksimolo's has a leak on his allready).
So, you think 250 RPM with a 24" wheel is going to be fast enought to do some damage? It is just that the ones I have seen looked like the blade was really cranking, like at 1000 RPM...
Carl
I am thinking of throwing between a 24 and a 30" chunk of steel with 16 to 24 teeth on it for a direct drive...
If I go with Pulley I probably will pick up that blade set that David pointed me to.... From Praxis...
Direct drive looks easier to construct for my skill level, and the PT is built that way, but there are some legit concerns about survivability (I know Ksimolo's has a leak on his allready).
So, you think 250 RPM with a 24" wheel is going to be fast enought to do some damage? It is just that the ones I have seen looked like the blade was really cranking, like at 1000 RPM...
Carl
sandman2234
Super Member
- Joined
- Dec 4, 2005
- Messages
- 6,008
- Location
- Jacksonville, Florida
- Tractor
- JD2555 and a few Allis Chalmers and now one Kubota
Calculate the surface speed of a 24" disc, you will be surprised at the feet per minute it is turning at the any particular rpm. My stump grinder uses a similar sized disc and the disc is really turning, and it is only run at pto speeds thru a 1:1 gearbox (540rpm). My blade tips measured 28" diameter, so also consider that. The way I figure it, a belt driven unit wouldn't be much harder than a direct one. Pillow block bearings for a jack shaft and taperloc sheaves on the jackshaft are standard bolt together parts. Using the wheel motors I have along with the hub that is mounted on it, and you have a five bolt pattern to bolt a sheave to so don't have to worry about the tapered shaft. Plus it also gives you a set of brake shoes to stop the spinning cutter in case you ever need to. I can't think of a reason to want to put brakes on one, but I can tell you that unless I drop my cutter wheel to the ground, the flywheel effect it has will keep it spinning quite a while. Brakes would make a great safety feature.
I am going to keep following this post and end up building a stump grinder to go on the end of the Turner boom mower arm. Might be interesting, but heck, I don't use the stump grinder I have now, so maybe that isn't such a good idea.
What is the attachment point of the PT look like? A tractor has a 3pt, which is pretty standard, but for some reason I keep thinking that the place to hook up a stumpgrinder would be on a flat plate on the front end loader arms.
You do remember the post about my trencher/stump grinder, don't you?
David from jax
I am going to keep following this post and end up building a stump grinder to go on the end of the Turner boom mower arm. Might be interesting, but heck, I don't use the stump grinder I have now, so maybe that isn't such a good idea.
What is the attachment point of the PT look like? A tractor has a 3pt, which is pretty standard, but for some reason I keep thinking that the place to hook up a stumpgrinder would be on a flat plate on the front end loader arms.
You do remember the post about my trencher/stump grinder, don't you?
David from jax
OP
woodlandfarms
Super Member
- Joined
- Jul 31, 2006
- Messages
- 6,137
- Location
- Los Angeles / SW Washington
- Tractor
- PowerTrac 1850, Kubota RTV x900
the PT has a wonky quick attach. The upside it is super simple to hook up and relatively cheap to fabricate. The downside is that it is, in my mind, not the strongest platform available for quick attaches and it is proprietary. No chance of bobcat implements going on easy....
In my head, I was going to generate an adjustable version of this... A standard quick attach mount so it goes on the front of the PT fairly harmlessly, and another, where it could be attached to the arm of the backhoe and maybe turned sideways, acting as a tree cutter of sorts (I have at least 6 acres of 4" alders that need to come down.. Hard to get with the brushhog..).
I am also not unsold on the belt system. Little things i have to work out for myself, especially how to machine the necessary holes, get the plates cut to the right size... I hope that I can rationalize to the wife that instead of a 2K stump grinder, I spent $300 on a motor, $300 on a blade $400 on steel, belts and pulles, and $1000 on tools to put it together (drill press, cutting tools).... We will see if I can get away with that next month... this one is shot cause I have to arrainge our aniversary...
Carl
In my head, I was going to generate an adjustable version of this... A standard quick attach mount so it goes on the front of the PT fairly harmlessly, and another, where it could be attached to the arm of the backhoe and maybe turned sideways, acting as a tree cutter of sorts (I have at least 6 acres of 4" alders that need to come down.. Hard to get with the brushhog..).
I am also not unsold on the belt system. Little things i have to work out for myself, especially how to machine the necessary holes, get the plates cut to the right size... I hope that I can rationalize to the wife that instead of a 2K stump grinder, I spent $300 on a motor, $300 on a blade $400 on steel, belts and pulles, and $1000 on tools to put it together (drill press, cutting tools).... We will see if I can get away with that next month... this one is shot cause I have to arrainge our aniversary...
Carl
sandman2234
Super Member
- Joined
- Dec 4, 2005
- Messages
- 6,008
- Location
- Jacksonville, Florida
- Tractor
- JD2555 and a few Allis Chalmers and now one Kubota
Do you already have the stuff you mentioned? If so, then I may start one myself as I won't be able to pawn it off on you... (lol)
Keep us informed and plenty of pictures coming!
David from jax
Keep us informed and plenty of pictures coming!
David from jax
