Original pinion bearings

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Model T Ford Forum: Forum 2017: Original pinion bearings
Top of pagePrevious messageNext messageBottom of page Link to this message  By Allan Bennett - Australia on Sunday, April 09, 2017 - 03:45 am:

What diameter are the rollers in original Hyatt pinion bearings?

Allan from down under.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Roger Karlsson, southern Sweden on Sunday, April 09, 2017 - 06:51 am:

Here's a citation from Trent Bogges in another thread:

1) the inside diameter of the driveshaft spool was 2.375" +/- .0005", 2)the driveshaft bearing rollers were 0.5625" +/- .0005", and 3) the drive shaft sleeve was 1.248" +/- .0005".

If the cage is loose - or if the driveshaft spool is worn oval, it's hard to find good parts to make the original setup work reliable. A modern bearing from Fun Projects or Model T Ranch is recommended.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Allan Bennett - Australia on Sunday, April 09, 2017 - 07:28 am:

Thanks, Roger. So it looks like the rollers are supposed to be 9/16". I have a nice tight, original bearing in which the rollers measure out at .559 to .560" so that makes approx .0025" wear. I didn't know if it was worth hanging on to for someone who is happy to use original parts.

Allan from down under.


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