2. General rolling characteristics
2.1 Functional tolerances
In addition to dimensional tolerances, ISO 492 also defines functional tolerances which guarantee rotational precision (table 1). Runout is measured by placing the dial gauge radially. It reflects a lack of circularity in the raceway of the ring being measured. Wobble is measured by positioning the dial gauge axially. On a pair of preloaded bearings, the combination of runout defects on the 4 rings results in a conical motion defect during rotation.
Inner ring out-of-roundness and out-of-roundness are measured by rotating the inner ring only.
The out-of-round and out-of-round of the outer ring are measured by rotating the outer ring only.
Finally, ISO 5753 defines the radial internal clearance of bearings...
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General rolling characteristics
Designing a tree line
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