48" Rotary Cutter Question

KentT · Jun 4, 2007

I'm trying to get prepped for a couple of mods for my 48" rotary cutter when I visit East TN in about 3 weeks. Yesterday, I fabbed up a deflector for the back of it, using a piece of 1.5" angle iron and bolting on two thicknesses of an antique flat PTO belt.

I also scrounged up a piece of solid rubber roller that's about 2" in diameter with about a 7/16" hole in the middle. I'm considering cutting two slices of this rubber roller for use as "soft bumpers" for the rotary cutter blades. But, I'd like to know what size bolts people are using in the two extra holes in the stump jumper to mount these "bumpers."

I know MR had posted a topic with pictures long ago about rebuilding his stump jumper, where he installed longer bolts with nuts on them to function as stops, but I can't find that post.

Can anyone tell me what size bolts I'd need, and an estimate on how thick these "bumpers" should be?

Thanks in advance!
Kent

BobRip · Jun 4, 2007

http://www.tractorbynet.com/forums/...-brush-cutter-things.html?highlight=horse+mat

KentT, look at the above link for pictures of my implementation. I can't remember the bolt size. The rubber was 3/4 inch thick with washer to space the rubber up and center in on where the blade is.

BobRip · Jun 8, 2007

KentT, the bolts are 5/8 inch diameter, 11 threads per inch, and two inches of thread on the bolt.

KentT · Jun 8, 2007

BobRip said:
KentT, the bolts are 5/8 inch diameter, 11 threads per inch, and two inches of thread on the bolt.

Thanks, Bob. The reason I was asking was that everything I'm finding over 2" has a shoulder on it, and that might've caused problems...

KentT · Jul 3, 2007

Bob,

Thanks for the help in preparing for this. I added two 3/4" rubber bumpers to stop the clanging and possible binding of the brush cutter blades. They seems to work quite well -- there's only a slight bump and thump when you engage the PTO now.

I also quickly added my "home-made deflector" on the rear. It worked well, but will rub the tires when you lift the brush cutter without tilting the front up, so I need to do some more tweaking to angle it forward on the ends...

http://flickr.com/photos/kentthomas/694554796/in/set-72157600595386655/

I was quite pleased with how well the brush cutter worked...