Reference number
ISO 17:1973
ISO 17:1973
© ISO 2025
International Standard
ISO 17:1973
Guide to the use of preferred numbers and of series of preferred numbers
Edition 1
1973-04
1973-04
ISO 17:1973
3602
Published
(Edition 1, 1973)
This publication was last reviewed and confirmed in 2020.
Therefore this version remains current.
Abstract
The best scale will be determined by taking into consideration, in particular, the two following contradictory tendencies: a scale with too wide steps involves a waste of materials and an increase in the cost of manufacture, whereas a too closely spaced scale leads to an increase in the cost of tooling and also in the value of stock inventories. In selecting a scale of numerical values, choose that series having the highest ratio consistent with the desiderata to be satisfied, in the order: R 5, R 10, etc.