What term refers to the distance that a shaft runs out on a machine?

The term that refers to the distance that a shaft runs out on a machine is eccentricity. Eccentricity specifically measures how far the center of the shaft is from the centerline of its intended path of rotation. It is an important concept in ensuring that rotating equipment operates smoothly and efficiently. Excessive eccentricity can lead to vibrations, uneven wear, and potential failure of the machinery, making it a critical measurement in maintenance and alignment tasks.

In contrast, axial shift of the shaft typically refers to the movement of a shaft along its length, rather than any deviation from its rotational axis. Misalignment generally pertains to the angular or parallel misplacement of components, which can also affect operation but is not a direct measure of the running out of a shaft. Conformity often relates to the fit and tolerance of parts in assembly, rather than measuring shaft runout itself. Understanding eccentricity allows millwrights to take necessary corrective actions to enhance equipment reliability and longevity.