Older U. S. Motors 3 Phase 220v Motor From Scrapped Out Bridgeport M MILL Head

IT IS3 PHASE ; 220V; 1/2HP; 1200 RPM. THE SWITCH MOUNT BRACKET HAS BEEN BRAZED (SEE PICTURES). I HOOKED THE MOTOR UP TO POWER AND IT RUNS. I CAN FEEL A LITTLE VIBRATION WHEN THE MOTOR IS RUNNING.