Adjustable drive shaft bearing

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Belliott3
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Adjustable drive shaft bearing

Post by Belliott3 » Sun Jun 23, 2024 6:19 pm

Are the parts suppliers no longer able to get the adjustable drive shaft bearing kits? Does anyone know where to get them?

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Oldav8tor
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Re: Adjustable drive shaft bearing

Post by Oldav8tor » Sun Jun 23, 2024 6:57 pm

Did you try Birdhaven?
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Re: Adjustable drive shaft bearing

Post by RajoRacer » Sun Jun 23, 2024 6:59 pm

Pretty sure Chaffin's now carries them.


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Re: Adjustable drive shaft bearing

Post by Belliott3 » Sun Jun 23, 2024 8:13 pm

Thanks for the info!

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Steve Jelf
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Re: Adjustable drive shaft bearing

Post by Steve Jelf » Sun Jun 23, 2024 11:46 pm

Fun Projects made both adjustable and non-adjustable bearings. I believe John started with the latter and added the adjustable version for folks who thought they should have to adjust something. :)
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Belliott3
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Re: Adjustable drive shaft bearing

Post by Belliott3 » Mon Jun 24, 2024 6:55 am

Interesting Steve: I guess I never considered buying the non-adjustable bearing because I thought it somehow inferior to the adjustable type. This opens another question; which bearing do most prefer or recommend and why?

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Re: Adjustable drive shaft bearing

Post by DanTreace » Mon Jun 24, 2024 7:17 am

Have purchased modern pinion set up from Birdhaven (enclosed spool) and from Chaffins (open spool) and both are well made.

Have removed an 'adjustable' version, and didn't reuse it, as the adjusting shims (shown hanging ) really just push the pinion gear off the the taper of the drive shaft to obtain some mesh. IMO the shims meet no real need.



Gear worn shaft from being loose, note shims over the modern bearing.

!cid_A01E6CADC4E2414C965062469C62C509@DanPC.jpg
!cid_A01E6CADC4E2414C965062469C62C509@DanPC.jpg (64.67 KiB) Viewed 1800 times
IMG_7981 (600x450).jpg
IMG_7981 (600x450).jpg (110.26 KiB) Viewed 1800 times

Prefer to use without shims, can assemble easy and fit ring and pinion regular way.




387661.jpg

Another option is the cartridge type, glued into the pinion housing, haven't used that type below:

http://www.texastparts.com/mm5/manuals/T2587-M.pdf
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Re: Adjustable drive shaft bearing

Post by Mark Gregush » Mon Jun 24, 2024 8:33 am

Never even considered installing the adjustable type. There is enough fussing getting the rear end setup without the additional work. I have installed two of the non adjustable type, worked fine.
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Re: Adjustable drive shaft bearing

Post by John.Zibell » Mon Jun 24, 2024 8:57 am

The shims don't push the pinion further out on the taper. That is fixed. The shims move the position of the spool in relation to the pinion for setting depth of engagement. Once engagement is set, the spool position is locked with a collar. We (Bill Robinson and I) found this system very easy to set up to get a good ring and pinion setup. We use the gear lube RTV (gray) and no gasket between the spool and differential on assembly. That keeps the adjustment exactly as established.
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Re: Adjustable drive shaft bearing

Post by jab35 » Mon Jun 24, 2024 10:57 am

After speaking with John Regan several years ago, I recently bought the adjustable kit 'just in case'. I started with a shim pack identified as "original set-up" and followed the instructions in the Rear Axle Restoration guide book. With new ring and pinion gears everything met book specs.

This was my first rebuild, but if I do another, I'll go with preset stock bearing kit. With the adjustable kit, because it is 'adjustable' there's a real temptation to adjust it, and that can misalign the bevel gears. With the pinion secured in the stock position, you bring the ring gear into correct mesh with the axle thrust washers, at least that is how it worked in my experience, YMMV, Respectfully, jb

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