Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Fabrication

SFT Search:   
Reply
 
Thread Tools Display Modes
  #1  
Old 04-19-2010, 08:56 PM
digr's Avatar
digr digr is offline
The Real Deal
 
Join Date: Apr 2005
Location: Duluth MN
Posts: 7,931
Default Blade Question

Since I retired I put the word out that I would take a little work in to help pay for our yearly vacation. So now I have jobs piled outside the door. This is one of them. Its a blade off of a John Deere excavator. It had two added layers plus the factory layer, each worse than the one before. This blade had a cutting edge scabbed on it. Do you think this blade needs a cutting edge? I haven't had time to run down to John Deere to take a look at one if the have one there. When new do they come with a cutting edge? The owner says they only use it for stabilizing the machine and buck the material against when cleaning up. Thats how this one got tore up, I am going to replace it with 3/8" Tribraze plate. (hardened plate roiled with a brake at a local machine shop)Thats it for now.

1 side

2 front

3 layers

4 gone
Attached Thumbnails
Click image for larger version

Name:	1.jpg
Views:	420
Size:	99.6 KB
ID:	60038   Click image for larger version

Name:	2.jpg
Views:	422
Size:	97.6 KB
ID:	60039   Click image for larger version

Name:	3.jpg
Views:	422
Size:	97.0 KB
ID:	60040   Click image for larger version

Name:	4.jpg
Views:	402
Size:	94.3 KB
ID:	60041  
__________________
Drawing by Smartdraw
Reply With Quote
  #2  
Old 04-19-2010, 10:14 PM
greywynd's Avatar
greywynd greywynd is online now
I can dig it
 
Join Date: Dec 2005
Location: Wainwright, Alberta
Posts: 4,643
Default

My mini ex just had a mild steel bar for a cutting edge, though I have to rebuild it (broke out in the back where the cylinder attaches) in the next week or so too.
Reply With Quote
  #3  
Old 04-20-2010, 11:58 AM
Lu47Dan's Avatar
Lu47Dan Lu47Dan is offline
Connoisseur of Old Iron
 
Join Date: Mar 2006
Location: N/W Pa.
Posts: 5,969
Default

Digr, the ones I have seen have a "cutting" edge on them, I would say that they are more of a wear bar then a true cutting edge. I see them being used to grade, back fill, and crowd the material for loading the excess. I would add a strip of steel to save the frame of the blade.
I looked at buying a mini that the blade was worn down into the frame of blade. To the fix it it would have been about $300 worth of materials, with what he wanted for the mini and the general shape of it, it would not have been worth spending the money on it to fix the blade.
Dan.
__________________
Tools to Men are like Shoes to Women , you can never have too many !!
Used diesel engines are an adventure anyway you look at them !!
Miller XMT-304 Multiprocess
Miller 10-E Wire Feeder
Miller Spectrum 2050 Plasma Cutter
Hobart AC/DC stick welder
Hobart 175 Mig
Craftsman O/A set
Turbo torch and B-tank
Reply With Quote
  #4  
Old 04-20-2010, 05:27 PM
digr's Avatar
digr digr is offline
The Real Deal
 
Join Date: Apr 2005
Location: Duluth MN
Posts: 7,931
Default

I don't know what model this but I don't think its called a mini, the arms are 2 1/2" thick and the blade is over 8 feet wide.
__________________
Drawing by Smartdraw
Reply With Quote
  #5  
Old 04-20-2010, 05:59 PM
dirtdigger's Avatar
dirtdigger dirtdigger is offline
Big Shovel
 
Join Date: Nov 2004
Location: Hillsdale, Michigan
Posts: 1,289
Default

digr,
most blades that size on a JD excavator are just welded on, instead of a replaceable bolt on cutting edge. Looks like you have the right idea of putting a NEW rolled face on the blade. I would weld on a cutting edge or some hardened steel of some sort. Those blades are not made to be used as bulldozers (neither are the final drives) but they get used just as hard.

don't ask me how I know..........
__________________
I used to get in trouble for playing in the mud...........now I get paid for it!
Reply With Quote
  #6  
Old 04-15-2019, 05:40 PM
digr's Avatar
digr digr is offline
The Real Deal
 
Join Date: Apr 2005
Location: Duluth MN
Posts: 7,931
Default

Evidently I never finished this post, when the owner looked at the bill he was a little shocked, I thought that i had seen the last of him but today he brought another one from a different machine, a little bigger with the same problem. And of coarse I have forgotten what I had used on the first one. Luckily I still had the bill, and I was a little shocked. Looks like I used 3/8" Tri braze steel for the blade. He said that the first one I did looks like new yet.



1 front 8'6". long

2 back

3 arms 3" thick arms going to 8" aq. tube
Attached Thumbnails
Click image for larger version

Name:	1.JPG
Views:	106
Size:	180.3 KB
ID:	150371   Click image for larger version

Name:	2.jpg
Views:	107
Size:	91.6 KB
ID:	150372   Click image for larger version

Name:	3.JPG
Views:	105
Size:	176.4 KB
ID:	150373  
__________________
Drawing by Smartdraw
Reply With Quote
  #7  
Old 04-15-2019, 07:35 PM
milomilo's Avatar
milomilo milomilo is offline
Auction Addict
 
Join Date: May 2010
Location: Wheatland, Wyoming
Posts: 14,728
Default

Do good work and they will usually come back.
__________________
Chris

We are losing sight of civility in government and politics. Debate and dialogue is taking a back seat to the politics of destruction and anger and control. Dogma has replaced thoughtful discussion between people of differing views.
Reply With Quote
  #8  
Old 04-16-2019, 04:05 AM
LKeithR's Avatar
LKeithR LKeithR is offline
Hey...wait...is there a prize?
 
Join Date: Aug 2011
Location: Langley, B.C.
Posts: 4,961
Default

Quote:
Originally Posted by digr View Post
I don't know what model this but I don't think its called a mini, the arms are 2 1/2" thick and the blade is over 8 feet wide.
A blade that wide would probably put it in the 8-10 ton range--definitely not a mini.

We've repaired blades in similar condition to that one. In fact, looking at the date of your original post we probably had one on the go at about the same time. If the new plates were just scabbed on they're usually not too bad to remove but if they did a "good" job of welding them on it can be a bitch to remove them can't it? We always put a good cutting edge on anything like that if we fix it. The cutting edge takes the wear and protects the shell of the blade or bucket--it's basically a sacrificial element. If they're replaced at the right time in their life they work well; the problem is that most people don't replace them till the wear is into the actual bucket or blade and then you're faced with replacing parts of the shell before you even put on a new edge.

Quote:
Originally Posted by milomilo View Post
Do good work and they will usually come back.
Yup, that's been our mantra for a lot of years. Build or fix something right the first time and it will last a lot longer. We've had more than one customer go away a little pissed because they thought we ripped them off but 3-4 years later when they realize that their machine or tool is still working like it should they suddenly understand the value of doing it right the first time...
__________________
Keith

Measure twice and cut once...or...wait, was that the other way around?
Reply With Quote
  #9  
Old 04-16-2019, 01:21 PM
digr's Avatar
digr digr is offline
The Real Deal
 
Join Date: Apr 2005
Location: Duluth MN
Posts: 7,931
Default

Got most of the rapper off and rolled over and the bottom is in fine shape, very good welds on this and it is very hard to find the seem, plus the rapper was stitched from the inside
Attached Thumbnails
Click image for larger version

Name:	1.JPG
Views:	72
Size:	187.7 KB
ID:	150394   Click image for larger version

Name:	2.jpg
Views:	69
Size:	97.8 KB
ID:	150395  
__________________
Drawing by Smartdraw
Reply With Quote
  #10  
Old 04-16-2019, 01:24 PM
digr's Avatar
digr digr is offline
The Real Deal
 
Join Date: Apr 2005
Location: Duluth MN
Posts: 7,931
Default

I weighed this blade with my scale one halve at a time with one end on the floor and came up with1170 pounds, how accurate would that be do you think?
Attached Thumbnails
Click image for larger version

Name:	DSCN4460.jpg
Views:	48
Size:	87.5 KB
ID:	150396   Click image for larger version

Name:	DSCN4461.JPG
Views:	50
Size:	181.4 KB
ID:	150397  
__________________
Drawing by Smartdraw
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 12:46 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.