RE: Art-Tech Shark 450
ginnz: seeing as it sheared the jesus bolt, turn the machine over and very carefully inspect the motor bell as I've seen some with cracks emmanating out from the set screw hole and going across the arms of the end of the bell. They show as faint silver lines and I have changed one motor that has only 2 arms still attached to the center where the shaft comes thru the end the others are cracked thru.