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In addition, irregular run-out is the result of worn or rough bearings which can manifest itself as either axial or radial run-out. Run-out will be present in any rotating system and, depending on the system, the different forms may either combine increasing total runout, or cancel reducing total runout.
In metrology and the fields that it serves (such as manufacturing, machining, and engineering), total indicator reading (TIR), also known by the newer name full indicator movement (FIM), is the difference between the maximum and minimum measurements, that is, readings of an indicator, on the planar, cylindrical, or contoured surface of a part ...
To check for lateral run-out when affixing a new rotor to an automotive disc brake. Lateral run-out (lack of perpendicularity between the disc surface and the shaft axis, caused by deformations or more frequently by a lack of proper cleaning of the mounting surface of hub.
Analog instrumentation senses the movement of the probe, and records the run-out waveform. When used to measure radial runout, the stylus is fitted to a large-area paddle that can span the voids in the tread pattern. When used to measure lateral runout on the sidewall the stylus runs in a very narrow smooth track.
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Often significant is also the maximum runout of the race on the inner ring, as this determines how far the axle may shift dynamically from its center position when rotating. For axle diameters between 1 and 18 mm, for the various ABEC classes, they are : ABEC1 : 10 um, ABEC3 : 7 um, ABEC5 : 4 um, ABEC7 : 2.5 um, ABEC9 : 1.5 um . [2]