Mid PTO on B series tractors. Size spec?

twomany said:

There is no need to "give it up".

I have already two complete Kubota PTO shafts, that include three female 25mm-10 spline u-joint yokes.

It's a simple enough task to cut splines on a length of shaft to end up with whatever configuration of drive line I care to produce.

If These components were not at hand, I would need to source them from Kubota or second hand etc. But with them, All that is required is some time in the shop and some specs.
It won't be hard to "cut to fit". So even specs are just something nice, not a requirement..

Thanks for your comments, I won't continue searching for some "after market" producer of the spline elements.

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twomany said:

Having done a pretty fair search on the topic, And needing to produce a male spline shaft to couple the mid PTO on a B7200 to a snow blower, I see dimensions such as 31/32 -10

Should that really be 25 mm -10?

I can purchase 25 mm or 1 inch "stress proof", but 31/32? Odd size .

I'm thinking Japan=metric= 25 mm.

Verification anyone? 31/32 = .968", while 25 mm = .984" ... .020 is "insurmountable" when it comes to sliding spline shafts together.

While I'm on the subject of PTO shaft for a front mounted blower, Is there a rule of thumb for when mid span support bearings are required, and when they are not? I have seen Kubota mounting kits with both executions.

TIA

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evan waa said:

I'm working on the same problem myself for a Kubota BX 2200 will crawl under and measure tonight would have found online comments of three sizes two of what you listed 31/32 10 25 mm 10 and 1 in 10 just wondering if you found out which one it actually is thank you

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evan waa said:

I'm working on the same problem myself for a Kubota BX 2200 will crawl under and measure tonight would have found online comments of three sizes two of what you listed 31/32 10 25 mm 10 and 1 in 10 just wondering if you found out which one it actually is thank you

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1. Number of teeth
2. Module
3. Pressure angle
4. Type of root
5. Class of fit

Donystoy said:

I would think that you are going to need the slip coupling that slides onto the mid pto. On my old B7200 I was able to obtain an old stock pto shaft from a dealer. It used the telescoping shaft that used the 1" X 1 1/8" shaft and tube style. I adapted it to the readily available Weisler components to fab up the remainder of the drive assembly required to connect to the blower.
Not sure if all mid pto's are the same but the one on my 1985 B7200 was identical to the one on my new LX2610.

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TheOldHokie said:

Those are involute splines and almost surely metric. You need more than diameter and count.

1. Number of teeth
2. Module
3. Pressure angle
4. Type of root
5. Class of fit

Dan

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