Engineering & mechanics
Belt pulley speeds
Compare pulley RPM and belt speed with a supplied slip allowance.
A clear answer. Here’s how.
Without slip, driven RPM=driver RPM×driver diameter/driven diameter. Applies your supplied fractional reduction to that ideal driven speed. Driver rim speed is πD×RPM/60. Diameters must use the belt pitch line. Belt stretch, torque capacity, pretension and dynamic effects are not inferred.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Driver pitch diameter (mm)
- 100
- Driven pitch diameter (mm)
- 250
- Driver speed (RPM)
- 1500
- Driven-speed reduction due to slip (%)
- 0
Example result
- Ideal driven speed (RPM)
- 600
- Driven speed after supplied slip (RPM)
- 600
- Driver rim speed (m/s)
- 7.85398163397
- Diameter ratio
- 2.5