View single post by Mark Olson
 Posted: Wed Sep 11th, 2019 09:47 am
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Mark Olson

 

Joined: Thu Nov 22nd, 2018
Location: Baton Rouge, Louisiana USA
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That is a crack. The hub appears to be made of pot metal.
Pot metal is often of poor quality, it is not created equally, it consists of what the maker threw in the "pot", and pot metal
may degrade as time passes. A pot metal part that shows signs of degradation will only get worse.
I"d say use it like it is if the fan seems to be balanced okay. If the crack bothers you, either find a replacement blade,
or patch the crack with an epoxy such as JB Weld, for cosmetic reasons only.