What to do with old Bush hog gearbox?

[Iplayfarmer]

What is the gear ratio of a bush-hog gearbox? It could be 1:1, or 1;2, or maybe 1:3

It's probably about 1:2. Bush Hog pitches a blade tip speed of 14,800 fpm on the 48" mower. A 2 foot radius equals about a 12.5 foot circumfrence. This means that to hit 14,800 fpm the blade has to go about 1170 rpm. On a 540 PTO that's just about a 1:2 gear ratio.

Of course even if you only had a 6" diameter drive attached to the output of the gearbox for a trencher, that's still 1850 fpm for the trencher blade to be moving. How fast do most trenchers blades move?

 

[Brad_Blazer]

I think the rotary mower gear boxes are closer to 1:1.5. Check these out.
ROTARY MOWER PARTS - Agri Supply

 

[Taylortractornut]

My first rotary trencher I made was from a 1to1 cotton picker spindle box. with a 2inch blade. works real good needs tiller teeth though. My second had offset teeth and from chipper blades and they used a 1 to 2 gear box and mor teeth it works better the faster it goes.

 

[J_J]

I think Sandman2234 has some pictures of one he made.

 

[PSDStu]

I am fixing to trade a 6' bush hog for a finish mower, and really wish you lived closer, because I would love to have one that I could rebuild the deck on, to replace the bush hog I am fixing to get rid of. I need a bush hog, but the finish mower has a paying job coming with it, so I figure I better take it...
David from jax

David,

If you feel like driving West on I-10 about 3 hours I will give you a 6ft Howse cutter that needs work. It needs some deck repair, a new gear box, stump jumper, and blades.......it's free for the taking!

PM if interested.

Stu

 

[firemanpat2910]

David,

If you feel like driving West on I-10 about 3 hours I will give you a 6ft Howse cutter that needs work. It needs some deck repair, a new gear box, stump jumper, and blades.......it's free for the taking!

PM if interested.

Stu

needs deck repair,new gear box, stump jumper and blades
lol what else is left, the tail wheel?? sounds like a project

 

[RobJ]

needs deck repair,new gear box, stump jumper and blades
lol what else is left, the tail wheel?? sounds like a project

hehe, not much left after all that is gone!!

 

[Redbug]

Possibly a stump grinder out of the gearbox and 3 point parts...

 

[daBear]

Sure would like to see one of the home made trenchers. I could use something like that for sure.

 

[Soundguy]

For sure keep it.. even if it is only a spare.. toherwasie.. as the others have mentioned.. you could build lots of things with it.. maybee even a auger.. etc..

soundguy