Part 3: Industrial machines with normal power above 15kW and nominal speeds between 120 and 15,000 RPM when measured in situ.
Second Edition 2009-02-01
Classification according to machine type, rated power or shaft height
Group 1: Large machines with rated power above 300 kW; electrical machines with shaft height H ≥ 315 mm. These machines normally have sleeve bearings. The range of operating or nominal speeds is relatively broad and ranges from 120 r/min to 15 000 r/min.
Group 2: Medium-sized machines with a rated power above 15 kW up to and including 300 kW; electrical machines with shaft height 160 mm ≤ H < 315 mm. These machines normally have rolling element bearings and operating speeds above 600 r/min.
Classification according to support flexibility
Two conditions are used to classify the support assembly flexibility in specified directions:
- rigid supports and
- flexible supports.
ISO Velocity Severity Chart (Guideline)
See also: ISO 10816 Vibration Severity Chart.