What method is used to determine shim needs in alignment?

The method of using dial readings is effective for determining shim needs in alignment because it provides precise measurements of any misalignment between rotating machinery components, such as shafts and couplings. Dial indicators are used to measure the relative position of the components at various points, allowing the millwright to quantify the amount of misalignment. This precise data enables the technician to determine how much shim material is needed to bring the components back into alignment.

Visual inspection, while helpful as a preliminary assessment, does not provide the specific measurements required to determine the precise amount of shimming needed. Torque settings and temperature readings are also important factors in alignment but do not directly measure misalignment or shim requirements. By relying on dial readings, millwrights can ensure accurate adjustments, leading to smoother operation and reduced wear on machinery.