Bearing type Shaft Log Seal

[Sharp shooter]

I just realized this was the seal, not the shaft. But out of curiosity, do they balance the shafts? Not a lot of centrifugal force but mass is mass. And balanced mass is better than unbalanced mass

I could be wrong, but I don't think they are Vic.

Here's Rex's prop shaft page with description. http://rexmar.com/page133.html