Which tools are commonly used to align a coupling between a motor and a pump?

The use of a straight edge and feeler gauge is essential for accurately aligning a coupling between a motor and a pump. A straight edge allows operators to check the alignment of the two shafts by providing a reference line. When placed across the coupling, the straight edge can show if there is any misalignment by indicating gaps or unevenness. Meanwhile, a feeler gauge is used to measure small gaps between the coupling faces. By inserting gauges of various thicknesses, operators can identify misalignments with precision, ensuring that both the motor and pump shafts are aligned properly. This alignment process is crucial because any misalignment can lead to increased wear on components, vibration, noise, and ultimately system failure.

While other tools listed might have their own uses in maintenance, they do not specifically serve the purpose of alignment as effectively as the combined use of a straight edge and feeler gauge. For example, a wrench and screwdriver are more suited for fixing or tightening screws rather than measuring alignment, while laser and compass tools might assist in broader alignment tasks but are not standard for simple pump-motor coupling alignment. Similarly, calipers and tape measures are typically used for measuring dimensions rather than for the specific context of aligning rotating machinery.