Pulley Calculator - Centres RPM, Belt Length and Speed
Large Pulley Diameter
Small Pulley Diameter
Pulley Centre Distance
Gap Small Pulleys May Touch
Enter Large and Small Pulley Diameters and Pulley Centre Distance.
Drag Centres slider to re-calculate and animate diagram.
Select RPM Large or RPM Small and enter RPM to calculate corresponding pulley RPM.
Drag sliders to animate diagram.
To fine tune Slider Controls click to select and use ◄► (cursor) keyboard keys.
Open new window containing only diagram images in current page ↓ This will better fit printed page. Printing to Scale Help
Your iPad, iPhone or Android Tablet or Phone is a valuable On-Site tool!
Lay your phone or tablet on an angled surface (roof ?) to directly measure angles and automatically calculate Roofing and Pitch Angle Apps.
If you've benefited from this free service please consider a small donation to:
Starlight Children's Foundation