A Variable Pitch Pulley is a type of pulley that allows for the adjustment of the diameter at which the belt rides, which in turn changes the speed ratio between the driving and driven shafts. It is commonly used in mechanical and power transmission systems where adjustable speeds are necessary without changing pulleys or belts.

Key Features

• Adjustable pitch diameter: By moving the sheaves (the sides of the pulley) closer or farther apart, the belt rides at a different diameter.
• Speed control: Changing the effective diameter of the pulley alters the output speed of the driven component.
• No need to change belts: Speed changes can be made without removing or replacing belts or pulleys.
• Used in V-belt systems.