In what scenario is a dial indicator used primarily?

A dial indicator is primarily used in precision measuring applications, especially in aligning rigid couplings. When aligning couplings, it is crucial to ensure that the two shafts are perfectly aligned to prevent wear and equipment failure. The dial indicator measures the discrepancies in alignment by detecting the distance between the shafts at various points as they are rotated. This feedback allows the technician to make precise adjustments to achieve the desired alignment.

In contrast, measuring torque typically involves a torque wrench or gauge, which is designed specifically for that purpose. Checking lubrication levels is done through sight glasses, dipsticks, or other measuring devices that indicate fluid levels, while adjusting chain tension usually requires different tools, such as tension gauges or manual adjustments. Therefore, the function of a dial indicator is best matched to the alignment of rigid couplings.