If you remove the electronics and the stop from a servo motor it will become a geared motor, just like any other geared motor. It will spin slowly with lots of torque.
Andy
All the conversions I've seen still use the original electronics and feedback system of the servo. That way you can control the speed of the motor with the standard servo signal. I wouldn't call ripping out the electronics "a conversion".
I'm using a PLC to control all the circuits that I have for my project , basically for this part , I want the PLC to send a signal to the motor to spin for a preset amount of time , maybe 5s or so and then stop. If I'm not wrong it's a C-14 8 input 6 output PLC , but we've added expansion units to the PLC.