Re: Bob Aller Oil Pump Rebuild

Posted by humanpotatohybrid On 2024/3/28 15:56:32
Quote:

Jack Vines wrote:
There's probably a very good reason none of the dozens of engine types we've torn down over the past sixty years use a ball or roller bearing on the oil pump drive shaft.

FWIW, lubricated cast iron is an excellent bearing surface. It's stronger and handles more load than oilite material.

jack vines


Regarding ball bearings: probably because having a pair of ball bearings would not seal against oil pressure and having only one is somewhat redundant. Also cost.

I don't doubt that cast iron is a tougher surface than oilite but there are other places (the generator) that oilite is used with a long life. Where I want to place a bushing here there should be nearly no radial load on it anyway... it's mainly to align the shaft with the seal, since the shaft is worn. And to retain the seal.

Thanks for your thoughts on it.

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