After using using my TS3650 for a little over 5 years I just recently noticed a metallic vibrating noise coming from the motor. Also notice a slight increase in vibration but nothing too major. Even with the motor off if I spin the pulley coming out of the motor I can still hear the metallic noise, very faint but still noticeable. Is it time to replace my bearings? Anyone else experience this with their table saw? Thanks!