Which measurement method uses a straight edge and feeler gauges?

The straight edge method is a traditional technique used to measure alignment by employing a straight edge and feeler gauges. This method is highly effective in determining whether machine components are aligned properly. The straight edge provides a reference surface to compare the height or position of different parts, while feeler gauges are used to measure gaps between the straight edge and the surfaces of the components being aligned.

By placing the straight edge across the points of interest and inserting feeler gauges into any gaps, a technician can accurately assess misalignment. This method is particularly useful for checking the alignment of horizontal and vertical shafts when high precision is not as critical compared to modern methods. Although other methods like the four-point, vertical alignment, and laser alignment methods exist, they utilize different tools and techniques that are distinct from the simplicity and accessibility of the straight edge and feeler gauges.