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ADASH Ltd.
ISO 10816 limit values
There is a wide range of valid standards but we would like to mention ISO 10816. It has several
sections and it also deals with procedures how to gain limit values for particular machines. It contains
3 tables of values, which are applicable for A4900 VibrioIII unit.
Classification according to machine type, nominal power or shaft height
Therefore, select the Group that best describes the general size, type, and speed of the machinery
being measured. Note that these machine group classifications are set forth in ISO 10816-3, which
rates overall velocity vibration levels for standardized machinery classifications.
Group 1 and 3:
ISO Group 1 and 3 classifications define the following type of machinery:
Large machinery and electrical machines with a shaft height greater than 315 mm. These machines
are generally equipped with sleeve bearings, but may use rolling element bearings.These machines
include pumps with multi-vane impellers and integrated drivers.
Group 2 and 4:
ISO Group 2 and 4 classifications define the following type of machinery:
Medium-sized machines and electrical machines with a shaft height between 160 and 315 mm.
These machines are normally equipped with rolling element bearings, but may use sleeve bearings,
and operate at speeds above 600 RPM. These machines include pumps with multi-vane impellers and
integrated drivers.
Classification according to foundation
An additional setting allows the specification (when defining the overall alarm levels) of measurements
taken from machinery with Rigid or Flexible foundations.
Evaluation ranges
For evaluation of the machine health from vibrations there are defined following evaluation ranges.
Range A: New machine vibrations should occasionally be in this range.
Range B: Machines in this range can be operated for unlimited period.
Range C: Machines in this range are not acceptable for a long period operation, they could be
operated till the repair time only.
Range D: Vibration values in this range are considered as very dangerous an they can cause a
damage of the machine.
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Adash 4900 – Vibrio III
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