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50+ Years of Working on Cornstalks
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Robert W Greif
Posted 10/19/2012 23:26 (#2650644 - in reply to #2650445)
Subject: My Crazy Disk



Dallas Center IA 515-720-2463
'Crazy' is what somebody called it on the old SF Ag Online many years ago.

As built by White: Center frame has front gangs of 7 blades each.
Rear center also 7 blades each.

Wings have 10 on the front. A extra blade on the front follows behind the center gangs to level.
9 blades on the rear.

So 28 on the center and 38 on the wings, for 66 blades.

It is a White model 271, 23-1/2', 9" spacing.
Suppose to weight 120# per blade or about 8000 pounds.

On the 7 blade gangs, there are now 4 blades.
On the 9 and 10 blade gangs there are now 5 blades.
That leveling blade is gone.
So 36 blades.
If each blade weighs 20# the new disk weight would be 20 blades X 20# ea or about 400 pounds less - 7600.
7600 divided by 36 blades is about 211 pounds per blade.
Really less since all the scrapers are gone.

I wanted a Deere 330 or maybe 335? [Not sure of the model numbers] Pretty decent disk with 11" spacing.
Or a Allis-Chalmers model 2600, also a 11" spacing disk.
Both the Deere and A-C models were also made with 9" spacing.
But good used disks cost money.

The cost of this deal, using 2012 prices from the Shoup catalog is about $1,925-
Note: I am not promoting Shoup. Just using their catalog for prices.
Blades: 36 each 22" notched disk blades at $38.50 each [ Higher if in lots of less than 12] or $1,386- for blades.

Bearings: I used good looking old bearings on the first bearing location in from the gang bolt nut.
Any inside bearing was new.
Also for this I have figured 100% new bearing flanges. You probably would not really need more than 50% of them new.
So 14 bearings at $28.50 ea. or $399-
And 14 flange sets at $9.90 ea or 138.60
Total of $1,923.60

To keep the spacing right, I made big flat washers out of old blades. Put them between spools that were not to get a blade.
Found out the easy way to do them was cut as you turned the gang on the disk. Much better than marking and cutting.
But it took a good deal of gas.

I am very happy with the job it does.
Have not felt it needed scrapers, even if a little damp.
I have used it in the spring, but pulling a good old spike tooth harrow right behind. And it was not wet.
I think this thing would be a Clod Maker and a half if used on wet ground in the spring, at least without the spike tooth right behind.

It is not the most fun to drive over for the next tillage pass. Ruff!

Biggest problem: Blades breaking! Always on the front gangs, and close to the ends.
My brother says it is because each blade designed to do 9" is doing 18". Don't know.
I want to try something if I get it going again. Remove some of my big flat washers. Then put a old worn blade right behide the new notched blade. Kinda of a backup. The curve probably would not match.

At present it is sitting out back with a broken gang bolt.
There are a bunch of things around here that need fixing, Corvette to Ford Ranger, to a couple tractors, etc:

One more thing: I also have a Krause disk, 25', with 9" front spacing and 8" on the rear.
Would not have done this if it was the only disk I had.

And I don't have any more pictures.





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