Which tool is used to measure the alignment of a rotor shaft?

The tool that is used to measure the alignment of a rotor shaft is the dial indicator. This instrument is specifically designed to provide accurate and precise readings of small distances and angular displacements, making it ideal for assessing shaft alignment.

When aligning a rotor shaft, it's essential to determine how well the shaft is aligned to its connecting components, such as the motor or gearbox. The dial indicator can measure the runout, which indicates any misalignment or eccentricity in the shaft's rotation. By placing the dial indicator against a reference point and rotating the shaft, operators can observe the needle's movement on the dial face, which reveals any discrepancies in alignment.

Using a dial indicator facilitates fine adjustments to achieve optimal alignment, thereby ensuring smoother operation, reduced wear, and increased lifespan of machinery components. This tool's sensitivity and ease of use make it the preferred choice in applications where precision in shaft alignment is crucial.