Straight bush hog gearbox

[J_J]

5 HP per ft, is the the general rule, and with 18 HP, you are really trying to burn up an engine.

The 44 uses a 10 HP engine, but does not sling around a heavy blade. You could perhaps modify the blades on the bush hog.

The 60 in Trail mower uses an 18 HP engine.



This hyd motor here will connect to the gear box on the bush hog, for 540 operation. but it needs 19.7 GPM's. The HP necessary to pump 19.7 GPM's, at 2500 psi, requires about 34 HP.

https://www.surpluscenter.com/item.asp?item=9-7368-100&catname=hydraulic

Swisher Products : T-44 Trailmower

Swisher Products : T-66 Trailmower

I am not saying you can't, but I would not waste a good engine.

 

[Soundguy]

get a 6' mower deck and use both engine each driving 3' of blade.. on that custom hub/spindle you are designing and even with losses.. it should cut decently in heavy stuff...


soundguy

 

[Bncrshr77]

6ft is a bit big for what I want......I figure what I will end up doing is digging around till I find a smokin deal on a 25hp or bigger engine...

Gotta figure out how I'm gonna get some kind of torque limiter/protection built into the set-up. I've been looking at an electric clutch but I don't think it will give at all..

 

[leonz]

Hello,
New to the forums and can't find what I'm looking for anywhere on the net..
I'm looking to turn a used pto driven 4 or 5ft bush hog into a motor driven pull behind cutter...

I'm sure the bush hog I buy will have a 90 degree gearbox on it......I'm looking for a gearbox or a way to build something so the shaft sticks straight up instead of forward.....This is so I can attach a pulley on it to line up with my 18hp B&S vertical shaft engine.

Anyone have any ideas?

====================================================================================================================================================================================================


After going through your postings I would strongly suggest you buy a used flailmower and a one to one gear box to operate the flailmower belt drive.

You will be much better off and you will have a bit of welding to do.

I will point out that you will need to purchase a remote throttle and kill switch kit for the specific engine you wish to use and this is a must have item.

 

[SPYDERLK]

I've been looking into the Hydraulic set-ups and it would be lots of money to go that route.....

I like the idea of taking the gearbox off and making a new spindle. I've read that using about a 10" and 4" pulley set up will give me a good blade speed..

Looking at the DR and Swisher type pull behinds and the engine size they use I'm figuring that I should be ok with an 18 horse??

Blades on bushog type 5' rotary cutters spin about 750 rpm I think. 4/10 X 3600 would be way too fast.
larry

 

[Soundguy]

if you belt it it will likely slip.. otherwise incorporate a standard slip clutch.. or soft shear bolt.

(no need to reinvent the wheel ( any mor ethan you are already doing that is.. )

soundguy