Stump grinder build

MELEON · May 5, 2020

I don’t have any machinists jacks. They are on my short list to make. I’ve got I 1,2,3 block with some bar stock as shims, then the strap clamps to hold those in place. All clamped in the vice.

You have a rotary broach (also on my short list) big enough to broach an 1-1/4 hole? I’d wouldn’t mind seeing a picture of that. Are the broaches that size expensive?

TMGT · May 5, 2020

Sorry, miss typed, should have said rotabroach (annular cutter). I'll typically drill those then make bushings to weld on if I need a super tight fit.

3Ts · May 6, 2020

Why not use DOM tubing? Or does it not have the tolerances you need?

MELEON · May 6, 2020

It’s kinda of a pain getting materials with this pandemic thing.
I’d have to bore out the bracket to insert the DOM tube anyway because 1” is my biggest drill bit, and im using 1-1/4” pins for that joint.

But mostly I’m just enjoying playing with my toys.

TMGT · May 6, 2020

MELEON said:
But mostly I’m just enjoying playing with my toys.

I hear that! Of course you could always use it as an excuse to buy some more toys.....

Was there a reason you didn't cut the holes out on the laser before bending?

MELEON · May 6, 2020

That piece is an off cut of the 4x4 used for the main beam.
It was at the last minute that I found out I could piggy back on one of the work orders. So I only had 1 evening to model the parts I needed. So I stuck with the parts I hadn’t bought materials for already.

I’ve only been with this company since January so I’m trying to keep my l nuisance level to a minimum.

Here’s a hasty model of what’s going on.
It’s what I do all day, and it’s the last thing I want to do when I punch out. so don’t judge it on its crudeness.

TMGT · May 6, 2020

MELEON said:
That piece is an off cut of the 4x4 used for the main beam.
It was at the last minute that I found out I could piggy back on one of the work orders. So I only had 1 evening to model the parts I needed. So I stuck with the parts I hadn’t bought materials for already.

I’ve only been with this company since January so I’m trying to keep my l nuisance level to a minimum.

View attachment 654231
Here’s a hasty model of what’s going on.
It’s what I do all day, and it’s the last thing I want to do when I punch out. so don’t judge it on its crudeness.

Ah got ya, i would definitely invest in some standard size annular cutters, perfect for what you're doing and way less of a pain then using the boring head!

Trust me, if you saw my cad work you'd probably laugh. I'm still stuck in the 2d world for the plasma right now.

MELEON · May 6, 2020

Looking at that crappy model just made me realize I screwed that bracket up. That 1 1/4 hole needs to be centred on the height or it’ll sit weird.

MELEON · May 9, 2020

Managed to salvage the main pivot bracket that I messed up. I ended welding the off cut to the top of the Bracket which allowed me to move the pivot point down to the centre of the bracket.
Made another sketchy setup on the mill to notch a piece of heavy angle iron for the cross tube.