Pulley Sizes

pulley_sizes

To determine proper pulley size, use the calculator below.

 

The basic formula for this calculation is:

Pump RPM                 Motor Pulley

=

Motor RPM                 Pump  Pulley

 

You can achieve a more precise calculation, if required, by using the Pitch Diameter* of the pump and motor pulley.

 

To find the pitch diameter of the motor pulley use the following formula:

Pitch Diameter (Motor Pulley) = Pump RPM X Pitch Diameter of Pump Pulley
                                                                                 Motor RPM

 

To find the pitch diameter of the pump  pulley use the following formula:

Pitch Diameter (Pump Pulley) = Motor RPM X Pitch Diameter of Motor Pulley
                                                                           Pump  RPM

*When using “A” section belts, reduce the pulley size by 0.75”; this must be added back to the answer in the pulley size calculations.  When using “B” section belts, reduce the pulley size by 0.35”; this must be added back to the answer in the pulley size calculations.

Size Calculator

Calculate Motor Pulley Pitch Diameter




Result:

Calculate Pump Pulley Pitch Diameter



Result: 0

Service & Repair

Giant provides service on each pump and accessory that we sell. Many basic repair procedures are covered in the Giant repair manual. For all other questions on service or repair needs please contact your local Giant distributor.