Stump grinder questions

[dickfoster]

$250's to get me to leave the property. You'd be better off buying the grinder for $6K. I have a CA environmental surcharge of $20k.

Yeah that sounds about right. :laughing::laughing::laughing:

 

[Jim Timber]

After materials, machining, paint, skidding/crating, the prices charged for these aren't so out of line. Getting in and lowering the price is just going to start a race to the bottom. Keep in mind; they're also giving the Feds 30% off the profits. Hard as it may seem to believe, I don't think anyone's getting rich selling 3pt stump grinders.

 

[dickfoster]

After materials, machining, paint, skidding/crating, the prices charged for these aren't so out of line. Getting in and lowering the price is just going to start a race to the bottom. Keep in mind; they're also giving the Feds 30% off the profits. Hard as it may seem to believe, I don't think anyone's getting rich selling 3pt stump grinders.

I think it's the comparison to the prices of other stuff that has me stumped. Pardon the pun.
Speaking of the Feds they have these things priced as if they were all made in the People's Republic of California.

 

[Jim Timber]

Where as I have zero labor, zero facilities expenses, zero consumables, and zero tax, and my cost was still $2k. Mind you, I have all of those for my manufacturing business, but I built this myself so I can rent it to my stump grinding business.

Gear box, teeth, pockets, steel, cylinders, fittings, valves, hoses, fasteners = $2k

You don't stay in business selling that at cost. You seem to have an unrealistic expectation of what these pieces cost; or you expect the people making them to work for P.R.C. wages. When you have a 120# wheel turning 700rpm in front of you, do you really want a $11/hr weldor doing the beads?

 

[woodlandfarms]

I built my own hydraulic. 18GPM machine. Teeth and wheel design from Greenteeth. Happy to answer any questions. Oh at the moment I have probably a hundred or so stumps removed, plus a thousand feet of trenching.

http://www.tractorbynet.com/forums/...mp-grinder-build.html?highlight=stump+grinder

 

[Mysfyt]

I built my own hydraulic. 18GPM machine. Teeth and wheel design from Greenteeth. Happy to answer any questions. Oh at the moment I have probably a hundred or so stumps removed, plus a thousand feet of trenching.

http://www.tractorbynet.com/forums/...mp-grinder-build.html?highlight=stump+grinder

Did a quick run through of your build. Very nice! I noticed you have some 'center cutting' teeth on your wheel. What is the advantage of these?

 

[woodlandfarms]

Sorry Mysfr Don't understand your question.....

 

[Mysfyt]

On one of your pictures, a set of teeth are straight instead of angled.

 

[Mysfyt]

This is my concept for a boom. A double acting cylinder inside the tubes will extend and retract it 12". There a four single acting cylinders to lock the inner tube when cutting. Opinions?

 

[Jim Timber]

This is my concept for a boom. A double acting cylinder inside the tubes will extend and retract it 12". There a four single acting cylinders to lock the inner tube when cutting. Opinions?

I wouldn't worry about the locking cylinders, and I'd go longer if you're going to bother telescoping. Use 5/16" wall mechanical tubing and size it so you can bush it with UHMW.

 

[Mysfyt]

I wouldn't worry about the locking cylinders, and I'd go longer if you're going to bother telescoping. Use 5/16" wall mechanical tubing and size it so you can bush it with UHMW.

You really don't think the locking cylinders aren't necessary?

 

[Jim Timber]

3.5" cylinder generates 24klbs force at 3kpsi. It's not going to bleed down on you.

 

[Mysfyt]

I was thinking in terms of any slop in the boom would translate into the cutting wheel doing the 'hop'.

 

[Jim Timber]

Only if it was loose - thus the shims.

 

[woodlandfarms]

Yes, there are angled and straight teeth. I have no clue as to how they came up with the design, I just followed the directions they provided. Gives a wider cut in the end.

 

[Jim Timber]

Changes the tooth orientation to the stump and allows more even chip loads.

I wish I'd gone with 900 series teeth so I could get reverse bend pockets. Mine doesn't plunge well with the gap left with straight pockets on the OD course.

 

[Mysfyt]

Yes, there are angled and straight teeth. I have no clue as to how they came up with the design, I just followed the directions they provided. Gives a wider cut in the end.

Good stuff! Thanks!