Maximum rotation speed for a potentiometer?
What you need is typically called a "servo mount" potentiometer, that is - designed to be mounted to and turned by a motor (as part of a servo loop) rather than by a human (e.g. the typical bushing mount). Sometimes they are found under slightly different terms as well, Vishay refers to them as "Precision Rotative Transducers" in this datasheet. The maximum rotation speed is specified as 600 RPM on the "ES" model (ball bearing, servo mount). Specified life is 30 million cycles.