Exact rotating-frequency arithmetic
Frequency Order Calculator
Convert a measured spectral frequency to shaft order, or convert a target order to frequency. The result is a frequency relationship—not a fault diagnosis or probability.
Frequency relationship
These are dimensional identities: rpm divided by 60 gives cycles per second, and order is the ratio of a component frequency to shaft rotational frequency.
ISO 13379-1:2025 is the current general guideline for data interpretation and diagnostic techniques; it replaced withdrawn ISO 13379-1:2012. Its public scope describes common concepts, technical characteristics and selection/development of an appropriate diagnostic approach. It does not publish this page’s former symptom weights or probability calibration.
ISO 13373-2:2016 covers vibration-data processing, analysis and presentation. ISO 13373-3:2015, confirmed current in 2026, describes a structured approach to vibration diagnosis. This calculator does not implement or certify conformity to either standard.
Removed claims: the former 17-fault matrix assigned undocumented integer weights and displayed score/max as “confidence”. No calibration dataset, likelihood model, false-positive rate or ISO clause supported those percentages, so the diagnostic ranking and fault table were removed rather than presented as probabilities.
Nikolai Shelkovenko
Nikolai Shelkovenko is a vibration analysis engineer and the founder and CEO of Vibromera. For more than 15 years he has balanced rotating equipment in the field rather than on a test bench: mulchers, industrial fans, crushers, centrifuges, shafts and spindles. That work is what the Balanset instruments grew out of — they were designed as a tool a specialist can carry to the machine and use alone, on site, not as laboratory equipment. Vibromera was founded in 2017 and has been based in Porto, Portugal, since 2023. Development, assembly and support of the Balanset line all happen here. The flagship instrument is the Balanset-1A, a portable analyser for single- and two-plane balancing and for vibration diagnostics. Nikolai is personally involved in customer support, in working through difficult balancing cases and in the development of the software. He works with customers worldwide, in any language.
