![]() However, this rule should not be applied to high frequencies of vibration such as those characteristic of gears and defective rolling-element bearings, as the amplitudes measured at these frequencies are lessĭependent on the method of machine mounting. A general rule is to allow twice as much vibration for a machine mounted on isolators. Vibration Severity Chart How To Use This Severity Chart 1) 3-in-1 chart plots vibration measure and levels for: Acceleration vs. Machines mounted on resilient vibration isolators such as coil springs or rubber pads will generally have higher amplitudes of The chart applies primarily to machines which are rigidly mounted or bolted to a fairly rigid foundation. The chart does not apply to measurements of shaft vibration.ģ. The chart applies only to measurements taken on the bearings or structure of the machine. Unfiltered or overall velocity readings can be applied since the lines which divide the severity regions are, in fact, constant velocity lines.Ģ. When using displacement measurements only filtered displacement readings (for a specific frequency) should be applied to the chart. 3 Air Density Factors for Altitude and Temperature Altitude (ft.) Temperature 70 100 200 300 400 500 600 700 0 1.000. When using the Machinery Vibration Severity Chart, thefollowing factors must be taken into consideration:ġ. Related Resources: vibration Vibration Severity Chart
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