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ISO 5290:2001
Belt drives - Grooved pulleys for joined narrow V-belts - Groove sections 9N/J, 15N/J and 25N/J (effective system)
This International Standard specifies the principal characteristics of grooved pulleys (for groove sections 9N/J, 15N/J and 25N/J) intended to take both single and joined narrow V-belts for industrial power transmission drives.
Some background information on the series of effective diameters is given in annex A.
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International Organization for Standardization [iso]