syncMechanical Design

Pulley & Belt Calculator

Calculate pulley ratios, belt lengths, and output speeds for belt drive systems.

check_circleSpeed Ratio: Ratio between pulley diameters.
check_circleBelt Length: Required belt length for the system.
check_circleOutput Speed: Speed at the driven pulley.
check_circleV-Belt Design: Essential for belt drive selection.

Pulley & Belt Calculator

Units:

mminch

Driver Pulley Diameter

Driven Pulley Diameter

Center Distance

Input Speed

RPM

school Theory & Formulas

Belt Length Formula:

L = 2C + π(D+d)/2 + (D-d)²/4C

Where:
- C = Center distance
- D = Large pulley diameter
- d = Small pulley diameter

Speed Ratio: N2/N1 = D1/D2