Belts & Pulleys
Belt Frequency Tension Calculator
Use the vibrating-string relationship with total belt mass per unit length to estimate static span tension from a measured natural frequency.
Inputs
Formula
Transverse vibration tension estimate
Worked example
Using the default values shown in the calculator, the same formula gives the following result. This is a quick sanity check for the calculation, not a design recommendation.
Inputs
- Belt mass per unit length
- 250 g/m
- Free span length
- 500 mm
- Measured natural frequency
- 50 Hz
Result
- Estimated span tension
- 625 N
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Frequently asked questions
What mass value should I use?
Use the total mass per unit length of the belt span. Manufacturer sonic-tension methods may instead provide product-specific mass constants and width factors.
Why can a real belt differ from the string equation?
Belts have bending stiffness and construction effects, so manufacturer calibration or product-specific constants can be important for precise tensioning.