It's not really the size of the table, but rather the required torque to turn the worm gear when under a load. At 36:1 it would require more torque than my 90:1, 6 inch RT. I'm using a NEMA 23, 280 oz/in motor, geared down 2:1. Until I put proper ball thrust bearings on the worm shaft, I could stop the RT with my hand. A RT designed for hand cranking does not have bearings to properly handle a motor drive.
Having said that, I would go with a NEMA 23.