Which instrument is commonly used for checking alignment in millwright work?

The dial indicator is widely recognized as a standard tool for checking alignment in millwright work due to its precision and ease of use. This instrument measures small distances and variations in surface levels, making it particularly effective for determining alignment of shafts, couplings, and other machinery components.

When aligning machines, millwrights often need to ensure that parts are perfectly aligned to prevent excessive wear, vibration, or damage during operation. The dial indicator provides a clear and measurable reading, allowing technicians to assess discrepancies with high accuracy. Its ability to detect even minute misalignments and provide direct readings makes it particularly valuable in achieving the tight tolerances required in industrial settings.

In contrast, while calipers might measure dimensions, they are not specifically designed to measure alignment. A torque wrench is intended for applying specific amounts of torque and does not provide alignment measurements. A laser cutter is used for cutting materials, not for alignment purposes. Thus, the dial indicator stands out as the appropriate choice for checking alignment in millwright tasks.