What is the quickest means to determine any change in the relief position of the propulsion turbine rotor caused by bearing wear?

The depth gauge micrometer is an effective tool for determining changes in the relief position of the propulsion turbine rotor due to bearing wear because it provides precise measurements of small distances. This tool allows machinists to accurately measure the distance from a fixed reference point to the surface of the component, which is crucial in identifying any shifts in position that may occur due to wear over time.

The depth gauge micrometer is specifically designed for such applications, making it the quickest method for obtaining accurate data on the rotor's position. It can easily be used in tight spaces and on components where precision is key, which is often the case in propulsion turbines.

While other tools like caliper gauges or laser measurement tools can also provide measurements, they may not offer the same level of precision for small changes as the depth gauge micrometer does. Ultrasonic measuring devices, though useful in certain applications, are typically more suited for thickness measurements rather than precise positional assessments related to bearing wear. Thus, for the specific task of measuring changes in the rotor's position due to bearing wear, the depth gauge micrometer is the most suitable and efficient choice.