BS ISO 3290-1:2014 pdf free

BS ISO 3290-1:2014 pdf free.Rolling bearings一Balls一Steel balls
amount, of an established series of amounts, which is the nearest to the actual deviation from the ball gauge of a ball lot
Note 1 to entry: Each ball subgauge is a whole multiple of the ball subgauge interval established for the ball grade in question.
Note 2 to entry: The ball subgauge, in combination with the nominal ball diameter and the ball gauge, is used by ball manufacturers to denote the mean diameter of a ball lot and is not generally used by customers for ordering purposes.[SOURCE: ISO 5593:1997, 05.04.11, modified一Notes 1 and 2 to entry have been added.]
element, irregularity, or group of elements and irregularities of the real surface, unintentionally or accidentally caused during manufacture, storage, handling or use of the surface
Note 1 to entry: These types of element or irregularity differ considerably from those constituting the surface roughness and are not considered during the measurement of the surface roughness.
Note 2 to entry: The limits for surface defects are not specified in this part of ISO 3290.
For purchasing and other general administrative purposes, some users optionally identify nominal metric ball diameters with only three digits following the decimal comma.This option does not identify the diameter with adequate precision for manufacturing purposes and the full long diameter values given in Table 1 with four or five digits following the decimal comma to precisely identify the size shall always be used for gauge and subgauge sorting purposes to avoid any possibility of ambiguity.
For purchasing and other general administrative purposes, some users optionally continue to identify nominal ball diameters with imperial exact fraction or decimal sizes which carry no risk of ambiguity.Metric equivalents are sometimes also shown but not used as the primary administrative identifier.If this option is applied, gauge and subgauge diameter tolerances in micrometres shall be added to the imperial nominal reference size or its exact metric equivalent with four or five digits following the decimal comma according to Table 1 of BS ISO 3290-1 for sorting purposes during manufacturing procedures.BS ISO 3290-1 pdf free download.