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Mike or caliper up a lobe at its peak and at its midsection, subtract the distance across its midsection from its peak and multiply by 1.5, then see what comes close in the catalog. That'll get ya in the ballpark.



Thanks Six, I'm seeing some stampings on the shaft and what looks like a tag welded on the unit, I will have to clean it up to read the numbers.

Faster Horses, Younger Women, Older Wiskey, More Money --- Tom T