International Organization for Standardization (ISO)
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ISO 2935:1974
Scope
This standard specifies the thickness of woodworking circular saw blades relative to the outer diameter and the diameter of the central hole. The thickness of woodworking circular saw blades is divided into 4 columns (1-4), and the hardness of the saw blades in each column remains basically unchanged.
ISO 2935:1974 history
1974ISO 2935:1974 Circular saw blades for woodworking; Dimensions