RoyJackson
Rest in Peace
- Joined
- Nov 17, 2001
- Messages
- 23,144
- Location
- Bethel, Vermont
- Tractor
- John Deere 4052R Cab,, Deere 855D UTV, Z920A Zero Turn Mower and assorted implements
Help me convert my chipper to 3pt
- Thread starter arrabil
- Start date
- Views: 5771
beenthere
Super Star Member
- Joined
- Aug 16, 2001
- Messages
- 18,510
- Location
- Southern Wisconsin, USA
- Tractor
- JD_4x2_Gator, JD_4300, JD_425, JD_455 AWS, added JD_455, JD_110, JD_X485(sold)
I'd belt the front connection to a shaft running to the rear, rather than double the gear boxes. But don't know what side pressure the mid PTO stub will take. And pretty fast for chain and sprockets.
Like someone mentioned....go get the PTO model
Right, not as much fun as doing a remake yourself.
BHD
Veteran Member
A caution about shear bolts,
If one is going to use a shear bolt, one needs to make the mechanism such that if the bolt does shear, the PTO shaft can not come loose and fly around a few times then loose the telescoping section of the PTO shaft, and then continue to beat the frame or draw bar with the end on the tractor, as you will be on the wrong side, of the machine to even get to kill the tractor,
so some type of C ring or some thing to keep the mechanism together if the bolt shears, (as normally it is some type of pipe over a shaft arrangement with the bolt threw it),
(my opinion is if the machine was designed to operate at 3400 RPM I would try to keep it there),
If one is going to use a shear bolt, one needs to make the mechanism such that if the bolt does shear, the PTO shaft can not come loose and fly around a few times then loose the telescoping section of the PTO shaft, and then continue to beat the frame or draw bar with the end on the tractor, as you will be on the wrong side, of the machine to even get to kill the tractor,
so some type of C ring or some thing to keep the mechanism together if the bolt shears, (as normally it is some type of pipe over a shaft arrangement with the bolt threw it),
(my opinion is if the machine was designed to operate at 3400 RPM I would try to keep it there),
Beenthere, its not so much that this is fun... a PTO chipper is $2K. I'm hoping to convert this one for about $250 and then sell the 10HP engine (figuring its worth about $250).
BHD, I was planning a pipe over shaft design for the shear bolt. And not on the driveshaft connection but something past it. So that the driveshaft can't do what you're describing.
I've actually been looking at the sprockets at Surplus Center. Sprockets and chain, a slip clutch, and a shear bolt is looking really good right now. The sprockets are cheap and smaller than the equivalent belt pulleys. I'd need a 12" pulley and a 2" at the minimum and as mentioned before, I agree a 2" pulley is of questionable effectiveness. But a 72 tooth sprocket is less than 9" diameter and a 12 tooth is 1.6". And the whole getup is really cheap.
BHD, I was planning a pipe over shaft design for the shear bolt. And not on the driveshaft connection but something past it. So that the driveshaft can't do what you're describing.
I've actually been looking at the sprockets at Surplus Center. Sprockets and chain, a slip clutch, and a shear bolt is looking really good right now. The sprockets are cheap and smaller than the equivalent belt pulleys. I'd need a 12" pulley and a 2" at the minimum and as mentioned before, I agree a 2" pulley is of questionable effectiveness. But a 72 tooth sprocket is less than 9" diameter and a 12 tooth is 1.6". And the whole getup is really cheap.
deerhunterf350
Gold Member
To ensure that the Slip Clutch is not tightened after you have made your final adjustment. Simply buy a PAINT MARKER, and mark across the Bolt Threads and up the side of the Bolt.
Then when you need to loosen the Bolts to "Slip" the clutch , after it has sat and possible rusted/seized up, before using it next. You will have the previous mark to quickly go back to the proper setting, then remark with a fresh mark.
Just a thought to keep from tack welding the threads. After all you may decide to remove the slip clutch and install on another implement if the Shredder sits for awhile with no activity. It will have "Clean" threads for adjustment to a lighter setting if needed.
Dan
Then when you need to loosen the Bolts to "Slip" the clutch , after it has sat and possible rusted/seized up, before using it next. You will have the previous mark to quickly go back to the proper setting, then remark with a fresh mark.
Just a thought to keep from tack welding the threads. After all you may decide to remove the slip clutch and install on another implement if the Shredder sits for awhile with no activity. It will have "Clean" threads for adjustment to a lighter setting if needed.
Dan
BHD
Veteran Member
I was going to suggest using 60 chain, and in lower speed applications it would be much stronger, or capable of handling more horsepower, but. see below,
I just looked up some roller chain HP ratings, and you have a problem regardless, and that is the speed of the small sprocket,
60 chain,
http://hitmax.com/idc/groups/hitmaxco/documents/supportingdocumentpdf/poc_005719.pdf
35 chain, http://hitmax.com/idc/groups/hitmaxco/documents/supportingdocumentpdf/poc_005716.pdf
OK you take the 3400 rpm rotor speed, and your 12 tooth sprocket,
the chain would need either an oil bath for the 35, and spray lubricated for the 60,
and 35 would only, 2.17 hp rating at that speed and sprocket,
and the 60 is only 2.17 hp, being it is heaver and the bends are greater being a larger pitch, so 60 would not be a good idea,needing the spray lubrications,
but to make it handle the possible 20 hp one would need at least 8 to 10 strands, of the 35 chain running in an oil bath,
another site that say much the same,
http://www.americanchainassn.org/acahpr122001R1.pdf
I think the belts may be the cheaper way to go, if you want things to last some time,
I just looked up some roller chain HP ratings, and you have a problem regardless, and that is the speed of the small sprocket,
60 chain,
http://hitmax.com/idc/groups/hitmaxco/documents/supportingdocumentpdf/poc_005719.pdf
35 chain, http://hitmax.com/idc/groups/hitmaxco/documents/supportingdocumentpdf/poc_005716.pdf
OK you take the 3400 rpm rotor speed, and your 12 tooth sprocket,
the chain would need either an oil bath for the 35, and spray lubricated for the 60,
and 35 would only, 2.17 hp rating at that speed and sprocket,
and the 60 is only 2.17 hp, being it is heaver and the bends are greater being a larger pitch, so 60 would not be a good idea,needing the spray lubrications,
but to make it handle the possible 20 hp one would need at least 8 to 10 strands, of the 35 chain running in an oil bath,
another site that say much the same,
http://www.americanchainassn.org/acahpr122001R1.pdf
I think the belts may be the cheaper way to go, if you want things to last some time,
BHD
Veteran Member
my suggestion,
Surplus Center - 18.75 O.D. H-BUSHING DOUBLE GROOVE PULLEY
and
Surplus Center - 3.15 O.D. 3/4 BORE 2 GROOVE PULLEY
and the appropriate bushing for the larger pulley, either a additional spring loaded tightener, or one of the shafts adjustable for belt tightener,
still pushing some HP limits and speed limits, with B belts, A will work better for the speed but still less HP, http://www.martinsprocket.com/2001/SecD.pdf
Surplus Center - 18.75 O.D. H-BUSHING DOUBLE GROOVE PULLEY
and
Surplus Center - 3.15 O.D. 3/4 BORE 2 GROOVE PULLEY
and the appropriate bushing for the larger pulley, either a additional spring loaded tightener, or one of the shafts adjustable for belt tightener,
still pushing some HP limits and speed limits, with B belts, A will work better for the speed but still less HP, http://www.martinsprocket.com/2001/SecD.pdf
So what about this setup:
drive shaft connected to: 9.75 pulley
9.75 pulley belt connected to: 2.95 pulley
2.95 pulley on same shaft as: 6.25 pulley
6.25 pulley belt connected to: 2.95 pulley
2.95 pulley drives the chipper
BHD, you still think I need two groove pulleys with a four pulley/two belt setup?
drive shaft connected to: 9.75 pulley
9.75 pulley belt connected to: 2.95 pulley
2.95 pulley on same shaft as: 6.25 pulley
6.25 pulley belt connected to: 2.95 pulley
2.95 pulley drives the chipper
BHD, you still think I need two groove pulleys with a four pulley/two belt setup?