I’ve been following the recent posts regarding deck motor failures and feel that much of this is due to constant vibration from improperly balanced blades. 

In 43 years of ET mowing (averaging 2 acres a week for 6 months of the year) I can only recall a single magnet failure. I use (2) tall motor decks; one for my lawn and another for vineyards. 

I think the secret to my success is using a precision blade balancer. I use a MAG-1000 and it is amazing. https://www.magna-matic-direct.com/blade-balancers/  The deck was much quieter and I have to believe it extends bearing life as well. Blade straightness can also be verified. 

You may wonder how sensitive it is. In one of their videos they placed a sliver of paper on a 24” blade and the balancer moved. 

I wanted to see if my old unit was still up to the task. So I did a quick test yesterday and a placed a 1” long piece of electrical tape on an ET blade tip. The tape made the balancer move! I’ve found that even brand new OEM blades can have their balance improved with this unit.