Rotary cutter hp: Size Tractor Needed  -- General Tractor Discussion Forum and Review Rotary cutter hp: Size Tractor Needed -- General Tractor Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Size Tractor Needed Forum

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 04-08-2005, 22:55 Post: 109608
jd60kid



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 Rotary cutter hp

Is a 45pto hp tractor too much for a five foot medium duty howse rotary cutter?? Just wanted to know before purchase of new tractor weather or not to finance a new rotary cutter as well..






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 04-09-2005, 07:14 Post: 109614
Art White



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 Rotary cutter hp

For that size tractor I'd be looking at a 84" twin spindle bush hog.






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 04-09-2005, 12:50 Post: 109620
plots1

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 Rotary cutter hp

My machine is 48 pto horse and it has all but done in the kk 5 footer, you need a bigger unit for that tractor. a 6 foot will barely cover the tracks, I'd at least go 7 foot Heavy Duty.






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 04-09-2005, 13:33 Post: 109621
jd60kid



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 Rotary cutter hp

do you think if I run it at a lower RPM say 2000 would that be easier on the bushog?






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 04-09-2005, 14:31 Post: 109622
Billy

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 Rotary cutter hp

You don't need a bigger cutter unless you want the cut path as wide or wider than the tractor wheels. Use it just like any other cutter. It's not the size of the cutter, it's what you cut with it.






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 04-09-2005, 16:24 Post: 109623
jd60kid



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 Rotary cutter hp

Ok but the high horsepower wont destroy the cutter??






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 04-09-2005, 17:49 Post: 109625
Billy

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 Rotary cutter hp

The higher horsepower will not destroy the cutter. What the blade hits will!






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 04-09-2005, 19:07 Post: 109627
greg_g



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 Rotary cutter hp

Ain't so Billy. He's torquing 45 PTO horspower (about 5250 ft/lbs) into a 30hp mower transmission that's only rated for up to 3500 ft/lbs. Something's gotta give, and it will eventually be the mower. 5250 ft/lbs will put a serious spin on the blades. But as soon as they hit something serious, the over-torque will take it's toll on the gears.

One solution is to reverse engineer a slip clutch. Adjust it for 30 PTO hp, which will then slip as soon as the tractor PTO tries to transfer more than 3500 ft/lbs. But if it were me, I'd just go with the bigger mower suggestions.

//greg//






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 04-09-2005, 19:34 Post: 109629
plots1

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 Rotary cutter hp

Sounds like Greg G summed it up. like I said you will need a HD cutter. running at PTO speed will take it's toll on a lighter duty cutter.I still use my 5 footer but it's going to bomb soon. And if you do fing an object that you didn't know was there the weight of that tractor will about tear a lighter built cutter into. I'm speaking from experince. do your self a favor and save for a well built HD cutter for that machine.






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 04-10-2005, 08:42 Post: 109643
Billy

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 Rotary cutter hp

According to the info I could find, the Howse light duty cutter has a 45 HP gear box and the medium duty has a 75 HP. jd60kid said it's a medium duty.


Now back to my point. If you cut what the cutter is capable of cutting, then I don't see a big problem. Now if you try cutting what the tractor is capable of cutting, then you can expect a different story.






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Discussion Boards > Active Subjects > Messages as Posted > Size Tractor Needed Forum

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