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ISO 255:1990 Belt drives - Pulleys for V-belts (system based on datum width) - Geometrical inspection of grooves
standard by International Organization for Standardization, 11/01/1990
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Specifies the methods of checking the regularity of the grooves and pulleys for V-belts. The grooved pulleys may be designed for use with classical or narrow V-belts. The groove details shall be specified by the dimensions shown in the figures 1 to 10.