What is the appropriate tool to verify total indicated runout (TIR)?

The appropriate tool to verify total indicated runout (TIR) is a dial indicator. A dial indicator is designed to measure precise linear distances and small movements, making it ideal for assessing the eccentricity or misalignment of rotating components. When checking TIR, the dial indicator can be mounted to a fixed point while the part being measured is rotated, allowing the user to observe any deviations in the measurement dial.

By tracking these subtle variations, the user can determine if the component is properly aligned or if it has any runout, which could potentially lead to imbalances or operational issues in machinery. The dial indicator's ability to detect these small discrepancies is crucial for ensuring precise engine construction and installation.

Other tools, such as height gauges, protrusion gauges, and feeler blades, serve different purposes and are not suitable for measuring TIR. Height gauges are primarily used to measure vertical distances or heights. Protrusion gauges assess the projection of parts but lack the precision needed for TIR measurement. Feeler blades are used for measuring gaps or clearances, which is not applicable for evaluating runout. Therefore, the dial indicator is the preferred tool for accurately measuring total indicated runout in engine construction and installation contexts.