Disc harrow HP requirements.

   / Disc harrow HP requirements. #1  

mjncad

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Is there a rule of thumb for disc harrow HP requirements? For example, 5hp per 1-foot of harrow width?
 
   / Disc harrow HP requirements. #2  
I would think that it would depend on how heavy the disc is. We had a heavy one when I was farming that was only 6ft. Many I see today the same size, would take a lot less hp because they are so lite.
 
   / Disc harrow HP requirements. #3  
Depends on several variables: weight of the disc, depth of blade penetration, soil type, soil moisture. I use a heavy 6.5 ft wide offset disc and pull it with my 2008 Mahindra 5525 (55 hp engine, loaded rear tires, about 6500 lb tractor weight). YOu need to pull a disc at 5-6 mph to get it to work effectively. I have plenty of hp in dry soil. If the soil is wet, then the disc digs deeper and loss of traction is a problem. So my guess is you'll need 5-10 engine hp to operate a disc like this.
 
   / Disc harrow HP requirements. #4  
Depends on several variables: weight of the disc, depth of blade penetration, soil type, soil moisture. I use a heavy 6.5 ft wide offset disc and pull it with my 2008 Mahindra 5525 (55 hp engine, loaded rear tires, about 6500 lb tractor weight). YOu need to pull a disc at 5-6 mph to get it to work effectively. I have plenty of hp in dry soil. If the soil is wet, then the disc digs deeper and loss of traction is a problem. So my guess is you'll need 5-10 engine hp to operate a disc like this.

Clarification: 5-10 engine hp PER FOOT of disc
 
   / Disc harrow HP requirements. #5  
Too many variables to really give you a good accurate answer. From my own personal experience I would say 1/3 of the pulling tractors weight would be maximum weight that you could pull. Width will not matter.
A disk that is 6' wide and weighs 2000lbs will pull about the same a a disk that is 8' wide and weighs the same 2000lbs. Everything on the wider disk is smaller and lighter weight per foot of width.
 
 
 
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