Motor Sheave Pulley Adjustment — Georgetown TX
The motor sheave (pulley) and blower sheave determine the blower's rotational speed by their relative diameters. Adjusting the motor sheave changes the blower speed, affecting both airflow volume and noise level. ProAir Georgetown adjusts sheave settings and corrects pulley misalignment for optimal cooler performance.
Many evaporative coolers are installed with default sheave settings that don't account for the specific duct system or space they're serving. A properly adjusted sheave delivers the correct airflow volume for the application — not just whatever was set at the factory.
What's Included
We measure pulley alignment using a straight-edge and correct any angular or parallel misalignment.
We calculate the current blower speed from sheave diameters and motor RPM.
For adjustable-pitch sheaves, we set the pitch to achieve the target blower speed.
We measure airflow after adjustment to verify the desired result.
We assess noise level after adjustment — a well-tensioned, aligned belt runs quieter.