What is the role of a dial indicator in machine alignment?

• A. To measure angular displacement
• B. To measure linear displacement and identify misalignment
• C. To balance rotating elements
• D. To monitor vibration levels

Answer: (B)

The role of a dial indicator in machine alignment is primarily to measure linear displacement and identify misalignment. When aligning machines, precision is crucial. The dial indicator provides a direct and accurate way to read small variations in alignment, which can occur due to improper installation or wear over time. By placing the dial indicator on various points of the machine components (such as the faces of shafts or bases), an operator can determine if there is any misalignment by observing the measurements displayed on the dial.

This tool is particularly effective because it can detect very slight changes in distance, helping technicians adjust the components until they are perfectly aligned. The use of dial indicators is widely recognized in the industry for its reliability and ease of use in alignment tasks.