pto slip clutch

[Bedlam]

Does anyone have any good sites that sell a PTO SLIP CLUTCH.?
I have a brush hog and cordwoodsaw, that Id like to have 'protected' .
I see the 'overrunning" ones but I seem to remember seeing ones that go on the shaft and would slip if you hit something.
I have found this one. In the slip clutch section. Has anyone seen these or have any experience with them?
http://www.ssbtractor.com/page41.html

Thanks.
Al

 

[shvl73]

Have you tried Agri-Supply.com?

 

[Bedlam]

Wow thanks. I looked there and see this one
http://www.agrisupplyco.com/cgi-bin/cgiitmls?m=ThisP&p=31951.000000&l=1
Looks like a great site to browse.
Thanks.All I need is some thoughts from people who run these clutches.
Al

 

[greg_g]

That one looks to be splined Allan, make sure the implement end of a slip clutch is compatible with the input shaft of the implement. Some input shafts are round, some are splined. If you're not sure, the bottom of that AgriSupply slip clutch is the implement end. I'm pretty sure it's splined. http://www.ptoshafts.com/newpage31.htm has a very good selection of both splined and shear pin (round) styles.

//greg//

 

[bjr]

I got a one for a #4 metric for my 60" tiller. It's great was a good price too. The suggestion about making sure of the implement end is a good one. The people at Agri-Supply are helpful too. bjr

 

[shvl73]

make sure the implement end of a slip clutch is compatible with the input shaft of the implement. Some input shafts are round, some are splined.

Good advise, check it out and avoid a mistake.

 

[Bedlam]

Thanks for the reply.
with reference to http://www.agrisupplyco.com/cgi-bin/cgiitmls?m=ThisP&p=31951.000000&l=1
I thought that the bottom part was female and slipped over the male pto shaft that is on the tractor. And the top end in the pic is female and would except the female implement coupler.(basically in-line).
Does that seem to be right?
I understand the 'smooth" shaft one is for a pin.
Thanks again
Al

 

[greg_g]

I thought that the bottom part was female and slipped over the male pto shaft that is on the tractor.

Nope. The slip clutch always goes on the implement end. Too dangerous to have those exposed springs so close to the operator. Overrunning clutches (generally) go on the tractor end, slip clutches belong on the implement end.

//greg//

 

[texbaylea]

Bedlam
The slip clutch is mounted at the implement end of the shaft. The tractor end is unchanged. I recently added a slip clutch to my Bush Hog rotary cutter.

The model I have has a smooth shaft on the gear box which was shorter than the clutch was designed for. I had to machine about 1/4" off of the female hub to allow the shaft and hub bolt holes line up plus drill out the hole in the mower shaft to accept a larger bolt. I mention this to warn that adding the slip clutch may not be a simple bolt up job as I had expected it to be.

Vernon

 

[flusher]

Does anyone have any good sites that sell a PTO SLIP CLUTCH.?
I have a brush hog and cordwoodsaw, that Id like to have 'protected' .
I see the 'overrunning" ones but I seem to remember seeing ones that go on the shaft and would slip if you hit something.
I have found this one. In the slip clutch section. Has anyone seen these or have any experience with them?
http://www.ssbtractor.com/page41.html

Thanks.
Al

Try

http://www.agpartz.com/agcat/index.php?cPath=33&osCsid=90a54b3c4aafa5a8007df4264846b615

I recently bought a Weasler slip clutch from them for about $100 including shipping.

 

[greg_g]

I had to machine about 1/4" off of the female hub to allow the shaft and hub bolt holes line up plus drill out the hole in the mower shaft to accept a larger bolt.

Unfortunately that horse is already out of the barn, but the proper way to make that fit would have been to shorten the shaft instead of grind off the end of the clutch receiver. I suspect more binding problems in your future. The difference in bolt holes could have been compensated for with sleeves. You accomplished the same end, but it would have saved overboring.

//greg//

 

[heehaw]

wow, i "thought" i had located a good price on a slip clutch, sure glad i haven't ordered it yet.
thanks
heehaw

 

[texbaylea]

greg

The problem was that the shaft out of the gear box was too short. I could have drilled a new hole through the shaft but that would have weakened it.

Vernon

 

[Bedlam]

Thanks for all the input and the links. It really helped. This is my first time in over 28 years of tractoring that I thought I had a need for this item. great to know that I was wrong with where it mounted. If it was not for the people here, I would have ordered it thinking it went in-line of the tractor end.Learn something new everyday...

 

[greg_g]

greg
The problem was that the shaft out of the gear box was too short. I could have drilled a new hole through the shaft but that would have weakened it.
Vernon

Ah, never encountered that issue before - prefering my implement transmission shafts to be splined. One more reason to stay with what works I guess. Thanks for the clarification. Which implement manufacturer, if I may ask? It may save somebody else the same grief in the future.

//greg//

 

[rcmike]

Nope. The slip clutch always goes on the implement end. Too dangerous to have those exposed springs so close to the operator. Overrunning clutches (generally) go on the tractor end, slip clutches belong on the implement end.

//greg//

Not trying to argue with you, I am just a little confused. If a bolt happens to break or the nut came off wouldn't the spring shoot away from the clutch? If that is the case I would think you would want it pointed away from you towards the implement. If it was on the implement end it would fly towards the operator. Or is there some other danger with the springs? I have one on the tractor pto basically to protect my tractor. I have a 4010 and a 4 ft KK rotory cutter. Whenever I would kick in the pto the shock would break a roll pin in the universal joint on the driveshaft from the engine to transmission, even at idle. Now it kicks in smoothly without the jolt. I can't imagine what would happen if I hit something big with it without the clutch.

 

[Soundguy]

Greg.. would you be surprised if i told you that JD 1517, 1518, and 2018 mowers had a torque limiter at the front of the pto shaft? ( I've never seen that before... My howse has a slip clutch at the gearbox at the implement. )

Luckilly my ample flip down steel pto shield on my NH tractor completely shrouds the torque limiter.. makes me feelbetter.

Soundguy

Nope. The slip clutch always goes on the implement end. Too dangerous to have those exposed springs so close to the operator. Overrunning clutches (generally) go on the tractor end, slip clutches belong on the implement end.

//greg//

 

[Bedlam]

I also have a shroud to cover the tractor shaft end. Im wondering if the only reason for it to be on the impliment end is "safety". I would think it would be safer under the metal shroud.Just a thought.Al

 

[texbaylea]

greg

I have an old Bush Hog SQ series that is now obselete. I guess that someone might buy one at auction or road side however. Would like to have a newer one but this one is still serviceable although I need to replace a bent tail wheeel fork.

Vernon

 

[neverenough]

Thanks for the reply.
with reference to http://www.agrisupplyco.com/cgi-bin/cgiitmls?m=ThisP&p=31951.000000&l=1
I thought that the bottom part was female and slipped over the male pto shaft that is on the tractor. And the top end in the pic is female and would except the female implement coupler.(basically in-line).
Does that seem to be right?
I understand the 'smooth" shaft one is for a pin.
Thanks again
Al

Generally the slip clutch is mounted on the implement side to make it easier to connect the PTO shaft to the tractor. If you had the clutch on the tractor end, each time you unhooked the implement, you would have to unbolt the clutch from the PTO shaft. If someone makes a quick disconnect clutch, or you use the same slip clutch for every attachment and just leave it on the tractors PTO shaft, then it wouldn't be a problem.

The clutch you posted the link to is a 1 3/8" diameter-6 spline male and 1 3/8" diameter-6 spline female clutch. That would be a normal 540 RPM PTO shaft clutch. If you're upgrading from a shear pin setup, I think you need the "smooth" 1 3/8" female, 6 spline 1 3/8" male. That setup would only work on the implement side.