The Angry Beaver

WranglerSS · Nov 21, 2013

Here is my 3 point stump grinder I just built. I bought the gearbox, hydraulic rams and PTO shaft from Woods. The rest I made using my 2x4 Torchmate Plasma table, Bridgeport Mill, Sheldon Lathe and lots of welding wire.

I'll be glad to answer any and all questions instead of trying to list every detail in the initial post.

bubbacuse77 · Nov 21, 2013

Well, get ready for the questions. First I want to say, "Awesome". More pictures please.

What did you use for a gear box? Is it one to one ratio? How about the wheel? make your own or buy it? If you made it I would be very interested in some picture and explanation as to the wheel and gear box hook up?
How much where the teeth and where did you get them?

Midniteoyl · Nov 22, 2013

Holy.. ! Nice work man!

Though, when I first saw your title, I thought of something else

mrmikey · Nov 22, 2013

That is one fine piece of work. Hows chances of a working video and some more close up pics, what size tractor....Mike

Jasonc87 · Nov 22, 2013

That's awesome man!! I am also interested in the wheel/gearbox setup.. This stuff really enthuses me. How long did this project take you?

TomSeller · Nov 22, 2013

Very nice work.

WranglerSS · Nov 22, 2013

bubbacuse77 said:
Well, get ready for the questions. First I want to say, "Awesome". More pictures please.

What did you use for a gear box? Is it one to one ratio? How about the wheel? make your own or buy it? If you made it I would be very interested in some picture and explanation as to the wheel and gear box hook up?
How much where the teeth and where did you get them?

Thanks for the replies.

The gearbox is a Woods with 1:1.92 ratio which basically doubles the RPM from the PTO. I run it at 2000 tractor RPMs which seems to run pretty smooth at the grinder.

The wheel I did myself. I bought a piece of 3/4" thick by 21" diameter plate and bored a hole in the center to accept a 12 spline hub to match the shaft on the gearbox. Here are some pictures of the wheel on the Bridgeport as I was trueing and drilling the holes for the teeth holders.

The teeth are from a company called Greenteeth. I chose them cause they are indexed so you can get three cutting sides per sharpening. I think I paid $375 for the teeth and holders. I ordered them from Lewandowski Equipment Company.

WranglerSS · Nov 22, 2013

mrmikey said:
That is one fine piece of work. Hows chances of a working video and some more close up pics, what size tractor....Mike

Here are a couple of videos from yesterday on its maiden grinding. The tractor is a Kubota L3240.

WranglerSS · Nov 22, 2013

WranglerSS · Nov 22, 2013

Jasonc87 said:
That's awesome man!! I am also interested in the wheel/gearbox setup.. This stuff really enthuses me. How long did this project take you?

I haven't calculated the hours it took me but I would guess at least 40.

TomSeller · Nov 22, 2013

WranglerSS said:
I haven't calculated the hours it took me but I would guess at least 40.

That is pretty dang good for 40 hours. I am impressed.

EMB5530 · Nov 22, 2013

I don't think that I need one but I want one.:drool:

That is a good build.:thumbsup:

jarokoro · Nov 23, 2013

you need to shorten and get stouter/larger arm to stop the bounce or it is going to break, the teeth are the best that is what I used on my vermeer they seemed to last for a long time, also dry not to dig dirt, I used to take a shovel or grub hoe and move the dirt/rock away from the stump reslly helps with the saving the teeth

WranglerSS · Nov 23, 2013

jarokoro said:
you need to shorten and get stouter/larger arm to stop the bounce or it is going to break, the teeth are the best that is what I used on my vermeer they seemed to last for a long time, also dry not to dig dirt, I used to take a shovel or grub hoe and move the dirt/rock away from the stump reslly helps with the saving the teeth

I think it was taking too big of a cut and moving too fast in the video of the maiden grind. I've now done 8 stumps and gotten better at feed and speed.

BTW hickory stumps are hard as all get out.

Agent Blue · Nov 25, 2013

Nice work. I need one also and not through with my research on build plan. The title is a bit leading but glad I read it. From the video it looks like saw stability might be looked at closer. Details on the wheel construction is what I need most. Thanks for the info.

Renze · Nov 28, 2013

This is still the fastest stump cutter ive seen.. wonder if a post hole digger could take that grinding screw..

Levaceppi Rotor S Stump cutter New Holland NH 8870 - YouTube

Brad_Blazer · Nov 28, 2013

Very nice build. I do agree with Jarokoro that your swing beam assembly looks like it needs more torsional rigidity. It's hard to tell if the flex is in the tube itself or in the u-joint where it attaches to the frame.

WranglerSS · Nov 28, 2013

It isn't flex. What is happening is if I take too deep of a cut or go to fast the cutting wheel will climb instead of cutting. I've done 8 stumps now and have figured out how to run it effectively. Works as designed.

chad22 · Nov 28, 2013

Nice build. I need to make me one of these too. I've got some stumps to grind out myself.

Chad

jawz41 · Dec 3, 2013

Nice work. Question is the rotary table on the Bridgeport a Pratt & Whitney? I have a 12" rotory table that's P & W but cannot find any manual or how to use it.