Free Machine Train Forcing Frequency Calculator (CPM, Hz & Orders)

This free forcing frequency calculator helps vibration analysts and reliability engineers identify the exact frequencies generated by motors, belts, gearboxes, pumps, fans, and compressors. Enter your machine train parameters and instantly calculate CPM, Hz, orders, gear mesh frequencies, belt rates, and vane/blade pass frequencies. This tool is designed to support ISO 18436‑2 vibration analysis training and real‑world troubleshooting. More Simulators

What This Forcing Frequency Calculator Does

This free forcing frequency calculator tool allows the user to enter machine information such as the running speed of the motor, the type of transmission (coupling, gearbox, belt) and type of driven units (pump, fan, compressor). The tool then calculates the forcing frequencies and displays them on a spectrum plot. This helps vibration analysts know what to look for in their vibration data.

Supported Machine Train Configurations

This free tool supports motors, couplings, two stage gearboxes, belts, 2 stage pumps, fans and compressors. There is nothing to download or install. Use it right here on the webpage.

How to Use the Calculator

Use the drop down menus to select the machine components. Enter the relevant details in the entry fields then press the orange “Calculate Forcing Frequencies” button to see the results. If you want to make any changes, just go ahead and make them. Press the orange button again to update the results.

Why Forcing Frequency Identification Matters

Vibration data is somewhat meaningless if you don’t know the physical details about the machine. Sure, you can say the vibration is “too high” or if you are trending you can say it has “gone up” but if you want to know what specific problem your machine has, you need to calculate the forcing frequencies, These help us differentiate between a gear problem and a pump vane problem or between a best issue and unbalance. This simple free tool will help you get started.