The size must be entered as a metric millimeter value and be between 0mm and 500mm. In general, the larger the size of the feature the greater the allowance (Grade) size will relatively be. The size will affect the allowance/tolerance that will be applied. The basic size or nominal size is the dimension to which the selected deviation and grade combination will be applied. Precision: 3" setting is the lowest precision required that is sufficient to accurately display all the tolerances in metric millimeters. Precision setting combined with an inch display may result in loss of accuracy and dimensions that do not represent accurate tolerances. Warning!: The "in" (Inches) display setting is there for convenience only. NOTE: Not all combination of Size/Deviation/Grade return valid results. All dimensions displayed as inches are converted from the metric values. The calculations are based on the British standard Metric ISO Limits and Fits.Īll internal calculations are done in metric millimeters to a precision of up to half a micron (0.0005mm).
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