Box Blade Build

[DT86]

That's a really nice blade, better than I could have built.

I do have one concern, where the top link attaches. It seems like it could use a brace from there to the top of the blade. There can be a lot of strain where the upright square tubing is.

 

[woodchipper]

Good strong fab project! I lke it. What about the back square tubing not being the whole width? Would solidify a whole lot more I would beleive.
Is this box blade built only for loosening up materiel on your drive way? Any field trial yet? Would be nice to know how your tractor be fairing!:thumbsup:

 

[jb1390]

That's a really nice blade, better than I could have built.

I do have one concern, where the top link attaches. It seems like it could use a brace from there to the top of the blade. There can be a lot of strain where the upright square tubing is.

Your concern has merit. I also had concern in that section, but thought the 3" by 3/8" bar would be enough. I figured if it would fail, it would twist, since flat bar isn't very good in torsional loading. Well, it did.

I did test it before painting, and it stayed straight even ripping some hard ground and pulling out rocks.

This happened by hitting a rock pretty hard going backwards. I'm glad I didn't do anything to the 3 point arms.

I'll add gussets or something to keep it from happening again.

I was originally going to add a bar to the rear of the blade like you were thinking, but I found it was in the way too much if I wanted to adjust the ripper teeth. There are lots of designs with the large triangles like I used with no center connection, the reason mine bent is the horizontal section of flat bar as opposed to a formed end like the commercial unit. I'll add gussets and it won't bend again.

 

[jb1390]

Good strong fab project! I lke it. What about the back square tubing not being the whole width? Would solidify a whole lot more I would beleive.
Is this box blade built only for loosening up materiel on your drive way? Any field trial yet? Would be nice to know how your tractor be fairing!:thumbsup:

It would be stronger if the tubing went the whole width, but it's not necessary either. The "beam" to prevent bending is most important at the bottom of the blade, and it's 3/8" steel, with the front and rear cutting edges tied together to form a triangle. I just added the box in between the arms because I had a couple pieces of scrap material that fit in there nicely.

The blade is primarily for loosening rough areas before grading with the loader. I have one project I really need it for, which is cleaning up after burying this rock.

I doubt I'll use it on the small section of gravel driveway I have, a york rake is a lot gentler and all that I need to smooth things out there.

 

[Arc weld]

Another good idea is welding another 3/8" flat bar on the bottom of the sides so it wears longer. The front corners wear the fastest. Hardfacing would be good their too.

 

[yellowdogsvc]

Very nice. I wish I had skills like that! How long have you been making your own implements?

 

[jb1390]

Very nice. I wish I had skills like that! How long have you been making your own implements?

Building them from scratch is a fairly recent thing. I started doing repairs on things 7-8 years ago, fixing a bucket here or there, replacing hydraulic piston mounting points, adding ss adapter plates, etc.

Then I needed to do some work on the flatbed for my truck, and ended up basically building a new one by the time I was done. That was a couple years ago. Since then, I've done 2 other flatbed stake body dumps including the scissor design and fabrication, which I enjoy doing - and it just made sense to do implements myself. They go together a lot faster than a truck body. Getting a plasma cutter and various collections of tools really helps things go together in a more efficient manner.

 

[jb1390]

Maybe I shouldn't be using it to remove 18" diameter rocks.

 

[Shield Arc]

Ouch! Welp, maybe it's time for a little joint prep? 6010 root, 7018 cap.

 

[jb1390]

Ouch! Welp, maybe it's time for a little joint prep? 6010 root, 7018 cap.

Considering there's a hole in the side of the beam where the base metal ripped out, I'm not sure the welds were the issue.