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Quiet Bearing Project on New Tool grinder

Jeff Toycen


Hello Everyone , 


I am working on a new version of the Cuttermaster   Have a very quiet 130v DC motor attaching to a lovejoy style coupling (which is a tight fit) 

coupling is pretty accurate bearing bores are within a few tenths for alignment and fit 

Should be quiet,     but not as quiet as id like  looking for ideas

I know deep groove balls make noise ,   

 Current theory is , bearings are running static ,no real load Class 3 fit very little grease tight butterfly in the coupling, bearings are being tossed around in the races

Proposed fix : move to class 2 earings  add grease 

Noisy Bearings.JPG

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