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Pulley GPS


Pulley GPS is the fastest means to change fan airflow accurately in fans driven with variable pitch pulley.

SKU: 667438785635


Variable pitch pulleys are adjusted by half cycle and each half cycle represents an operating position. Our Pulley GPS is used to measure the operating position of a variable pitch pulley.  It comes with a chart. 

With that chart, you can accurately determine the airflow of a fan:

  • In all the operating positions within a pulley
  • Size of replacement pulley if necessary
  • Operating position in the replacement pulley
  • Size of the belt at all operating position.

The Pulley GPS is your resource to analyze fan performance and proffers solution in a minute so that you can get the work done flawlessly at minimum time.

Changing Airflow is a Breeze – See chart in pictures.

Design Airflow = 4000 CFM

Present Airflow = 4500 CFM

Action (reduce) = 500 CFM (reduce to 90% of 4500 CFM)

Pulley size = 6” (Diameter)

Other features

  • Used at both digital and analog modes
  • Used as a micrometer
  • Built in belt sizer

Additional information

Weight 1.8 lbs
Dimensions 11 × 6 × 1.15 in


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