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WPR4488

Posted 5/1/2023 23:12 (#10212307)
Subject: Small offset disc HP requirements

I have a Case 75A MFWD. It has about 75 drawbar HP and weighs around 9,000 pounds with the loader on it. I’m looking at offset discs. There is a Mexican company called Industrias America that makes some that cost a good bit less than more well known brands. I’ve been reading pretty good reviews on them. Here are the specs on a model that I’m looking at:

8' 9" wide cut.
Standard with 24" blades, 3/16" thickness.
Comes with notched front blades & either smooth or notched rear blades.
Approximate weight: 2,870 lbs
9" disc spacing.
Gauge 7 frame tubing.
Greasable bearings.

-Can someone tell me how well my tractor will pull this disc with the wheels all the way up?

greasegun

Posted 5/1/2023 23:25 (#10212316 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

W.C. Mo.

Do not know your location or soil type BUT I used to pull a 10 ft with a 130 hp 2wd and it was a load HERE.

WPR4488

Posted 5/1/2023 23:36 (#10212327 - in reply to #10212316)
Subject: RE: Small offset disc HP requirements

I’m in eastern Arkansas. Some is silt clay. Other is gumbo.

dt4020

Posted 5/2/2023 00:27 (#10212353 - in reply to #10212327)
Subject: RE: Small offset disc HP requirements

Fairbury, NE (Southeast)

Have a standard 25 ft. disk with a old 200 hp FWA tractor.

When going light it is a breeze.

When she is completely in its all it wants.

I would say you will be maxed out and then some.

wannabe2

Posted 5/2/2023 02:03 (#10212369 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

NW Montana

You would need 100hp min tractor if you want to go 6” deep

If you don’t need to go that deep

I run a 12’ w 28” blades in sandy soils and it will bring a 160hp tractor to around 4mph on the hills at 7 to 8” deep

barren

Posted 5/2/2023 04:02 (#10212389 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

Glasgow, Ky

I pull an offset about that size with a 4040 Deere 2wd. No way to run with the wheels up due to tractionissues. In my opinion, if you do have the traction due to it being a 4wd you won't have the hp to pull it.

DRester

Posted 5/2/2023 04:57 (#10212396 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

Franklinton, LA

This 24 blade disk weighs 2870 pounds so it has a weight of 120 pounds per blade. With 24" blades you will need at least 150 pounds of weight per blade to get good penetration. The disk will cut a lot better if it has 22" blades. You will have problems with 3/16 X 24" blades bending and breaking. A 1/4 X 24" blade will be a lot more durable. However, with 3/16 X 22" blades you should have an acceptable blade life. The 7 Ga. or 3/16" frame tubing will bend, twist and crack. Frame tubing that is at least 1/4" thick will be a lot better.

Your 9,000 pound tractor weighs 3 times as much as the disk. Wheel slippage will not be a problem. With a 75 drawbar HP tractor you will have less than 40 pounds of disk per DBHP. You can pull the disk 4 - 5 MPH but don't count on going 6 MPH. Also, 22" blades will cut deeper than 24" blades so don't count on running faster with the smaller blades.

17821x

Posted 5/2/2023 05:06 (#10212403 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

NE Iowa

Your tractor is 75 engine hp not drawbar hp. Trust me I have one. I tried pulling a 6 row planter in my hills and couldn't get over 4 mph. No way it will handle that disc.

thefarmers

Posted 5/2/2023 05:30 (#10212420 - in reply to #10212403)
Subject: RE: Small offset disc HP requirements

Ya, I just looked it up. If it’s a caseih farmall 75a, it’s 56 drawbar hp. According to Nebraska tests. Also only weighs 5900#, and I doubt the loader weighs 3000#. And 2870# is pretty light for almost a 9’ disc I think. We used to have a 10’ case offset with 26 “ blades, and I don’t remember the weight, but I’d guess it was at least twice that, and it was none to heavy if the ground was hard. We pulled it with a 100 pto hp tractor. If the disc has enough weight to penatrate, I don’t think you will pull it with the wheels in the air, at least not fast.

Edited by thefarmers 5/2/2023 05:32

paul the original

Posted 5/2/2023 06:19 (#10212469 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

southern MN

75hp engine, about 65 hp pto, less hp drawbar......

I have the blue version, nice economy tractor wish it had a better seat.

Got it for loader work a few months ago, the little bit I’ve used it for pulling I was not so impressed with its pulling traction, my 2wd ford 5200 seems to have more oomph which surprises me. Not a big deal I didn’t buy it for pulling.

I think you could accomplish something with that disk but I think it often will be too much load for a 65 pto hp tractor and might not be the best match.

Paul

pigshephard

Posted 5/2/2023 06:46 (#10212517 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

SENE

We pulled a 9.5ft JI Case offset disk once with a Case IH MX135. It pulled it but not very good and not very long because we ended up tearing up the front drive shaft from all the strain. The blades were very worn too so I'd say yours would be a no go no matter where you are located.

pigfarmer82

Posted 5/2/2023 06:52 (#10212528 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

north central Ohio

I think you’ll be fine that disk is pretty light per foot you may just have to work over things a few times to get desired results. My vertical till weighs 700+ per foot or 220#/blade so that disk is pretty light.

TWB

Posted 5/2/2023 08:08 (#10212664 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

Middle Tennessee

I think a 7 foot offset would be a better match for your Case IH 75A. I agree with another poster get a 1/4 inch thickness blades if going with a 24 inch disc blade. I believe they would hold up better if bogging up new ground.

twraska

Posted 5/2/2023 08:13 (#10212670 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

Wallis, TX

First of all a the 75 refers to engine hp, not drawbar hp. If you weight the tractor up, will move the disk but most of the time you will want more ponies. We pulled a 9’ with a 100 hp fwd tractor, it was a load on it.

DRester

Posted 5/2/2023 10:16 (#10212826 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

Franklinton, LA

Horsepower is defined as the time rate of doing work. The force required to pull a tillage tool does not change that much as you change speed from 3 - 8 MPH. However, horsepower requirements increase as travel speed increases. The horsepower required to pull a disk will increase by about 25% if you run 5 MPH rather than 4. You will need about 50% more HP to run 6 MPH rather than 4. I have seen people do a good job with a 2 bottom, 3-point lift moldboard plow in 2nd gear at about 3 MPH with 25 HP Ford and Ferguson tractors. I have even seen major tractor company advertisements listing a 40 HP tractor as a 3-plow tractor.

He can pull that disk if he has less than 50 pounds of disk per PTO HP and 2.5 pounds of tractor per pound of disk. The speed he can run will vary with cutting depth, soil type, soil moisture and numerous other factors. I would not recommend trying to pull an offset disk unless you have at least one PTO HP per 45 pounds of disk. You can run faster if you have less than 40 pounds.

Edited by DRester 5/2/2023 17:44

danofarming

Posted 5/2/2023 14:10 (#10213194 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

You can Pull it. Liquid Ballast in your rear tires will help, if you do not have it already. The Disc will not go in the ground as deep as you think it should/will on the first pass. Make subsequent passes at angles to previous pas for maximum benefit.

Bigshot

Posted 5/2/2023 16:51 (#10213340 - in reply to #10212307)
Subject: RE: Small offset disc HP requirements

You sure about the weight? It's a very light disc.

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