PTO shaft diameter ??

[Pooh Bear]

Ok, I know the part of the shaft sticking out of the back of the
tractor is 6 spline 1 3/8 inch diameter.
What is the diameter of the part of the shaft inside the tractor?
Is the 1 1/8 shaft the same diameter?

Early 1949 8N, converted to 1 3/8 PTO.

Thanks.

Pooh Bear

 

[Dan]

You measure PTO shafts by the INSIDE diameter, not the ends of the spline.

The inside section is the same diameter.

HTH,
Dan

 

[TheOldHokie]

(quoted from post at 07:28:46 07/14/09) You measure PTO shafts by the INSIDE diameter, not the ends of the spline.

The inside section is the same diameter.

HTH,
Dan

Not sure what's going on here or why the question even arises but the OD of the spline is 1-3/8" (or 1-1/8" in the case of the original). The section of the shaft inside the tractor has a couple of different OD's - in particular the area where the bearings are installed. Don't remember the exact size but the bearings themselves are metric as is that section of the shaft.

TOH

 

[Pooh Bear]

So if I wanted to take my old 1 1/8 PTO shaft
and mount it on pillow block bearings with a
small pulley somewhere in the middle, does that
mean I would need PBB with a 1.125 bore?

I know it is sort of an odd ball question.
I aquired a roller pump that will pump 22 gpm
at 1000 rpm; 11 gpm at 540 rpm. I figure I can
use a couple of pulleys and get it up to 1000 rpm
with the tractor sitting there at near idle.

At an idle speed of 450 rpm, the PTO should be
turning at about 200 rpm. I have an 8 inch pulley.
If I put a 2 inch pulley on the old PTO shaft I could
run the tractor a little above idle and get the speed I need.
I'll sleeve the 1 1/8 PTO shaft to bring it up to 1 3/8.
Then I can just stick the pump right on it.

Sounds like a plan to me anyway.
I just need to know what size shaft for the pillow block bearings.

I could go dig the old shaft out of the shed and measure it
but it's easier just to ask here and I don't get greasy.

Thanks.

Pooh Bear

 

[TheOldHokie]

(quoted from post at 07:58:33 07/14/09) So if I wanted to take my old 1 1/8 PTO shaft
and mount it on pillow block bearings with a
small pulley somewhere in the middle, does that
mean I would need PBB with a 1.125 bore?

I know it is sort of an odd ball question.
I aquired a roller pump that will pump 22 gpm
at 1000 rpm; 11 gpm at 540 rpm. I figure I can
use a couple of pulleys and get it up to 1000 rpm
with the tractor sitting there at near idle.

At an idle speed of 450 rpm, the PTO should be
turning at about 200 rpm. I have an 8 inch pulley.
If I put a 2 inch pulley on the old PTO shaft I could
run the tractor a little above idle and get the speed I need.
I'll sleeve the 1 1/8 PTO shaft to bring it up to 1 3/8.
Then I can just stick the pump right on it.

Sounds like a plan to me anyway.
I just need to know what size shaft for the pillow block bearings.

I could go dig the old shaft out of the shed and measure it
but it's easier just to ask here and I don't get greasy.

Thanks.

Pooh Bear

The bearing mounting points on the PTO shaft are metric. You will need the corresponding pillow block. As I said I don't remember the bearing number off hand. You do realize that you will loose a lot of torque in the process....

TOH

 

[Pooh Bear]

According to the manual the pump needs about 2.5 hp to operate @ 100psi.
How much torque can it take to make 2.5 horsepower.
I won't be anywhere near 100psi.

Pooh Bear

 

[TheOldHokie]

(quoted from post at 08:37:38 07/14/09) According to the manual the pump needs about 2.5 hp to operate @ 100psi.
How much torque can it take to make 2.5 horsepower.
I won't be anywhere near 100psi.

Pooh Bear

Don't know but if I understand you correctly ou want to put a 2" pulley on a 1-3/8" shaft. I think that's going to be tough.

TOH

 

[Kevin Singleton]

Why not just cut the splined end off the shaft and
weld it concentric to a segment of 1 inch drill rod,
and use 1 inch pillow blocks? Quick, easy, cheap,
and no guesswork.

You know, you don't get full horsepower output at
off-idle speed, so you might not have enough power
to drive the pump until you get the speed up, a
little. I know my front end loader pump will barely
operate at idle speeds, so take that into account.
My 8N

 

[JMOR]

Machined areas are splines, bearing, and near the center point where differential carrier is closest to shaft. Other areas are rough.

 

[TheOldHokie]

(quoted from post at 09:01:31 07/14/09) Why not just cut the splined end off the shaft and
weld it concentric to a segment of 1 inch drill rod,
and use 1 inch pillow blocks? Quick, easy, cheap,
and no guesswork.

I'd say welding it concentric is far from easy. Better to just fit it to a piece of round shafting using a readily available shaft adapter made for this exact purpose.

I found the bearing info - 1.181" x 2.441" x .630" (30mm x 62mm x 16mm). That's a common #6206 bearing.

TOH

 

[Pooh Bear]

I guess I could just get a shaft coupler for a 15/16 shaft.
Then get some pillow block bearings for that size shaft.
And I know I can get a 2 inch pulley with a 15/16 bore.
I have one with a 1 1/16 bushed bore. Just get a different bushing.

But how would a piece of hot rolled 15/16 round stock
behave turning at 1000 rpm. Will it wobble too much?

I could go up a few sizes for the driven pulley
and just run the engine further above idle.

Pooh Bear

 

[TheOldHokie]

(quoted from post at 09:43:16 07/14/09) I guess I could just get a shaft coupler for a 15/16 shaft.
Then get some pillow block bearings for that size shaft.
And I know I can get a 2 inch pulley with a 15/16 bore.
I have one with a 1 1/16 bushed bore. Just get a different bushing.

But how would a piece of hot rolled 15/16 round stock
behave turning at 1000 rpm. Will it wobble too much?

I could go up a few sizes for the driven pulley
and just run the engine further above idle.

Pooh Bear

The OD on hot rolled won't be accurate enough to fit a bearing bore - use cold rolled or some TGP 1045 shafting - cheap and readily available in small quantitiies. If you want something custom just send me the dimensions - I have lots of scrap that can be turned to suit your specific application.

TOH

 

[Kevin Singleton]

I'd like to know more about this readily available
shaft adapter. Got a link?

Thanks!
My 8N

 

[TheOldHokie]

(quoted from post at 15:14:29 07/14/09) I'd like to know more about this readily available
shaft adapter. Got a link?

Thanks!
My 8N

Some examples may be found in the Farm Products catalog at [u:406726e429][b:406726e429]Hub City Inc.[/b:406726e429][/u:406726e429] There are other sources and combos available. TSC likely has something suitable.

TOH

 

[Ultradog MN]

Hot rolled wont usually come in 1/16" sizes either. 1/8" is usually about all you'll find.

 

[Pooh Bear]

TOH - I might take you up on that offer.
I already know I need a shaft 1.375 inches diameter.
Don't know exactly how long I need it yet.
It gets a 5/16 hole drilled across the diameter 1.5 inches from the end.
This will be the shaft hooked up to the PTO of the tractor.
I'm just gonna use the driveshaft off my brush hog to hook it up.

I'll have to get my old PTO shaft out and look it over.
If it can't be made to work, then I'll need a shaft for that too.

Thanks.

Pooh Bear.

 

[TheOldHokie]

(quoted from post at 00:07:43 07/15/09) TOH - I might take you up on that offer.
I already know I need a shaft 1.375 inches diameter.
Don't know exactly how long I need it yet.
It gets a 5/16 hole drilled across the diameter 1.5 inches from the end.
This will be the shaft hooked up to the PTO of the tractor.
I'm just gonna use the driveshaft off my brush hog to hook it up.

I'll have to get my old PTO shaft out and look it over.
If it can't be made to work, then I'll need a shaft for that too.

Thanks.

Pooh Bear.

Perhaps it would be easier (and cheaper) to just build EXACTLY what you need rather than try to re-ross bone yard parts. A 4:1 speedup PTO drive for a 15/16 round shaft pump should be almost trivial.

TOH

 

[Pooh Bear]

(quoted from post at 07:40:42 07/15/09)
Perhaps it would be easier (and cheaper) to just build EXACTLY what you need rather than try to re-ross bone yard parts. A 4:1 speedup PTO drive for a 15/16 round shaft pump should be almost trivial.

TOH

For the 'Fluff For Brains' bears among us, could you tell us how?
I'm trying to use parts I have to do it cheap.
I have pulleys, and an old 1.125 PTO shaft.
Pillow block bearings would set me back about $15 each.
I need 4 of them, plus a pulley sheave. About $65 total.
Nuts, bolts, misc hardware to put it all together, a shaft,
round it off to about $125. That should cover everything.
(gosh, I didn't realize it would cost that much :shock: )
I sure would be open to better ideas. (and cheaper).
How would you do this project.

Thanks

Pooh Bear

 

[TheOldHokie]

(quoted from post at 14:21:54 07/15/09)

(quoted from post at 07:40:42 07/15/09)
Perhaps it would be easier (and cheaper) to just build EXACTLY what you need rather than try to re-ross bone yard parts. A 4:1 speedup PTO drive for a 15/16 round shaft pump should be almost trivial.

TOH

For the 'Fluff For Brains' bears among us, could you tell us how?
I'm trying to use parts I have to do it cheap.
I have pulleys, and an old 1.125 PTO shaft.
Pillow block bearings would set me back about $15 each.
I need 4 of them, plus a pulley sheave. About $65 total.
Nuts, bolts, misc hardware to put it all together, a shaft,
round it off to about $125. That should cover everything.
(gosh, I didn't realize it would cost that much :shock: )
I sure would be open to better ideas. (and cheaper).
How would you do this project.

Thanks

Pooh Bear

Contact me offline so I can get some specifics.

TOH
301.655.0631
[email protected]