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Northern CA | We are going to be in the market for a new to us disc. We are hay farmers and typically plow or chisel before we disc. We have had both tandems and offset discs in the past and have always liked the job the offset did better. But, looking online, there are far more many tandems for sale and they are cheaper. I think I am looking for a Case IH 770 but noticed about 5 times more Case IH 496 models for sale.
We haven't liked the tandems because it leaves a furrow on both sides and usually a hump in the middle. It always has appeared to be far more level behind an offset. What am I missing here as to which disc does what type of job and why the tandems are more popular. |
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Brant Ontario, Canada | I have one of each. I use the offset for breaking up older ground and chewing up cornstalks because it is much heavier. The tandem disk is mainly used for spring tillage on bean ground. The blades are closer together and it is lighter so it won't chew up the corn stalks as much.
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Wallis, TX | A 770 and a 496 aren't even in the same league. |
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Pasco WA. | Buy the 770. One of the best all around disks ever built. I have yet to see a tandem disk leave a more level finish than a 770 will. The only reason I replaced mine was because I started growing corn and needed more weight. |
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Northern CA | Another issue is we have always fought losing disc bearings. Did they ever make a Case IH 770 with oil bath bearings? |
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Sunnyside, WA | Offset is more for primary tillage and a tandem is more for finishing. I have a 21' folding Krause 5800 that I am selling. Not discing anymore with my cropping practices. This Krause is about the same as a CIH 770. My Krause has rock flex and still is on the original blades. |
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Pasco WA. | The bearings on my 770 lasted as long as the blades. Was long enough for me. I never greased the bearings. Most people over grease them and blow the seals.
My 770 was the older style with 1 lift cylinder. The newer style with 2 cylinders and heavier hubs is a lot better. |
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central - east central Minnesota - | Fawazhay - 5/22/2014 23:07 We are going to be in the market for a new to us disc. We are hay farmers and typically plow or chisel before we disc. We have had both tandems and offset discs in the past and have always liked the job the offset did better. But, looking online, there are far more many tandems for sale and they are cheaper. I think I am looking for a Case IH 770 but noticed about 5 times more Case IH 496 models for sale. We haven't liked the tandems because it leaves a furrow on both sides and usually a hump in the middle. It always has appeared to be far more level behind an offset. What am I missing here as to which disc does what type of job and why the tandems are more popular. Could you pull a Wishek or Kello-Bilt ? Now those tandems are primary tillage disks that really leave a level finish. |
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| The furrows caused by a tandem disk can be eliminated by putting much smaller (worn out) blades on the outside back gangs. The hump at the middle is the result of too aggressive an angle on the back gangs, or not enough angle on the front. On some tandem disks this angle is adjustable. |
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NE WI | We used a 14' Kewanee offset disc for many years. It did a nice job on stalks. It was rock flex. We did keep the bearings greased on a regular basis. The book stated 1 or 2 pumps a year. After the first year we replaced 2 bearings. Once we kept it greased on a regular basis we never replaced a bearing after that. Had 26" blades.
Edited by Jason_WI 5/23/2014 06:35
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Texas | Fawazhay - 5/22/2014 23:37
Another issue is we have always fought losing disc bearings. Did they ever make a Case IH 770 with oil bath bearings?
Grease them every day until I see grease , 95 % of original bearings on our old 490 .
Seals are a " o" ring -impossible to blow out . On the old 490 anyhow . |
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West Chazy, New York | There is a difference between a tandem and a double offset. On a true tandem the front and rear gangs are directly across from each other. On a double offset, the left side will be slightly staggered from the right side, so that the front gangs overlap slightly, eliminating the middle ridge. That said, I made most of my living the last several years running offset discs; mostly Towner and Rome, and I don't think there is any question that an offset is more trouble free than a tandem or double offset. |
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Whiskey, Tango, Foxtrot | I've never ran a disk that ran as true as a 770. Lots of Hutchmasters here, they aren't bad. Everyone claims they eat bearings, but I've never put a bearing in mine. Greased the bearings just a little to make sure they had grease when I bought it, while turning it so it didn't blow the seals. Never put a bearing in it, checked them this spring and they are smooth. FWIW, I've got a 14' Hutchmaster I'm probably going to sell if that interests you.
Either stick with an offset, or get a big tandem or double offset. Something made by Kelo bilt or Wishek. I've ran both, and the newer big ones will do a good job of disking, but they are $$$. A tandem disk is only good for light finishing in mellow ground. Any sod or alfalfa crowns and they just fluff the ground a little.
I'd also agree with the others that a 496 isn't much of a disk. |
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ND | WE bought a new JD 630 disc in 1992-not the greatest disc but in all those years never went thro any bearings. Greased it every quarter of land-gave it 6 pumps with a pistol grip hand grease gun. |
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Offset vs Tandem Disc
