What is the function of shims in the alignment process?

In the alignment process, shims serve a crucial function by correcting uneven machine foot contact. Uneven contact can lead to misalignment, which may cause increased wear on components, vibrations, and operational inefficiencies. By inserting shims under one or more machine feet, technicians can adjust the height and level of the machinery, ensuring that the machine base sits evenly on its foundation. This leveling is essential to achieving proper alignment between coupled machinery, such as motors and pumps, allowing for optimal performance and longevity of the equipment.

While holding machines in place during alignment is important, it does not address the underlying issue of unevenness, which is what shims specifically correct. Shims are not designed to enhance the weight of the machine or to fix alignment issues permanently; they are temporary adjustments that should be monitored and maintained. Proper use of shims is an integral component of effective equipment alignment.