Straight Edge Disc Blades VS Notched Edge Disc Blades

Does anyone know how much faster notched 22" 1/4" thick blades would wear down than regular edge disc blades, also and other disadvantages of notched blades, did not know how they hold up if we have rocky soil, was consider putting them on since we have some muck soil and have some issues with front blades not wanting to turn or they slow down and slide sometimes.

Thanks Brent
 
I have notched blades on both the front and back gangs on my Taylorway disc. It is pretty heavy. We have quite a bit of rocks here and I don't have any problems. I always thought they cut sod up better. Don't know any real disadvantages to them.
 

One disadvantage to notched disc blades is I've never seen or heard of a machine that can sharpen them similar to regular disk. I think thickness of disk is more important when used in rocks than the shape of the outside of the disc.
 
Our disc-ripper has notched blades on front and straight edge on back, I thought was because the notched blade would cut stalks better in wet conditions. Other than that either should be fine, in my opinion
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Smooth edged are okay in light, tame, stubble and stuff like that. Notched are lots better all around. They might wear a little faster but they also do so much more work that you might save several passes across a field, certainly in sod.
 
I used to see those blade sharpeners in farm catalogs of the 50's but never saw one or ever heard of someone sharpening a disk blade. The notched blade is supposed to penetrate hard ground better but I never had any of them. But with the notch it does not have so much area to penetrate the ground that could be the reason why.
 
The advantage isn't the point of wear . The notched blade will all ways cut and a smooth blade does a good or better job finishing . This said if you are breaking soil use notched if you are finishing use smooth.
 
(quoted from post at 08:07:14 12/18/16) Never heard of anyone sharpening disk blades.

Back when I was employed by JD dealer a man would show up once a yr to sharpen disc's. This guy utilized a roller that rolled new sharp edge. I've heard of a machine that would grind an edge. Back in the 60's-80's there were many disc tillers utilized in my area.
 
only disadvantage I have ever had to my notched blades on the rear gangs of my small 3 pt disk.

for whatever reason from time to time, I have had the rear gang outside notch blade catch on the drag chain, hanging up that gang causing it to drag dirt up into a pile before I notice it.

was so frustrated one time by this that I fully intended to come back to the shop and torch off the notches on the outside rear disk blades. But reason prevailed.

I just learned to drop disk and I pull forward and the drag chains stretch out and do not catch.
this is the only disk I have ever had that had notched blades on the rear gang. why I bought it I do not know,

have seen large disk that have smaller disk blades on the outside ends of the rear gangs, this maybe so they will not form a large ditch on each pass, do not know.
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With rolling a new edge on a disk blade you gain a little diameter. When you grind a new edge you lose a little diameter.
 
Never used them on a disc but put a set on my planter markers and if not adjusted from no till to worked dirt those things will dig deep.
 
The notched blades will penetrate better than smooth blades when placed on a lighter disk. This is due to the weight being spread over less area. However, as disks get larger the advantage is much less. Due to more weight being on the cutting edge the notched blades also wear faster, sometimes twice as fast or more. They once were common on smaller disks but not as much anymore. Mike
 
Knotched, as stated, cut up residue better. Wish I had them on the front of mine. I don't think I ever saw a set worn out.
 

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