What is one of the main causes of misalignment in rotating equipment?

Thermal expansion is a significant factor contributing to misalignment in rotating equipment. As equipment operates, it generates heat, which causes the materials, such as metal components, to expand. This expansion can lead to a change in the geometrical relationship between shafts, bearings, and other alignment-critical components. If the expansion is not evenly distributed or accounted for during installation, it can result in misalignment when the machinery returns to ambient temperature or during normal operation.

Proper alignment is crucial for the efficiency and longevity of rotating equipment, as misalignment can lead to increased wear, vibration, and ultimately failure. Understanding how thermal forces influence equipment is essential for millwrights, as it informs best practices for installation, maintenance, and operational protocols.

While other factors, such as incorrect installation procedures or extreme environmental conditions, can also cause misalignment, they are generally considered secondary to the direct impact of thermal expansion on rotating machinery under operational conditions.