Free Engineering Tool
Permissible Vibration Velocity (ISO 10816)
Look up permissible vibration velocity limits per ISO 10816 / ISO 20816. Select machine class, enter measured velocity to get zone evaluation A/B/C/D.
Results
| Zone | Velocity Range | Meaning |
|---|
Vibration Velocity RMS
The vibration velocity RMS value is related to peak velocity by:
- vRMS — root mean square vibration velocity (mm/s)
- vpeak — peak vibration velocity (mm/s)
ISO 10816 evaluates machine vibration severity based on broadband vRMS (typically 10–1000 Hz). Machines are classified into four groups, and each group has four evaluation zones (A, B, C, D).
ISO 10816 Zone Boundaries — All Classes
| Zone | Class I (≤15 kW) | Class II (15–75 kW) | Class III (rigid, >75 kW) | Class IV (flexible, turbo) |
|---|---|---|---|---|
| A (New) | ≤ 0.71 | ≤ 1.12 | ≤ 1.8 | ≤ 2.8 |
| B (Acceptable) | 0.71 – 1.8 | 1.12 – 2.8 | 1.8 – 4.5 | 2.8 – 7.1 |
| C (Tolerable) | 1.8 – 4.5 | 2.8 – 7.1 | 4.5 – 11.2 | 7.1 – 18 |
| D (Damaging) | > 4.5 | > 7.1 | > 11.2 | > 18 |
All values in mm/s RMS.
Practical Example
Given: Measured vibration velocity = 3.2 mm/s RMS
Class II boundaries: A ≤ 1.12, B ≤ 2.8, C ≤ 7.1, D > 7.1
3.2 mm/s exceeds B boundary (2.8) but is below C boundary (7.1)
Result: Zone C — Tolerable for limited periods only. Plan corrective action.
Professional field balancing instruments with built-in ISO 10816 zone evaluation. Measure, analyze, and balance on-site. Used in 50+ countries.
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.
