Overview
ISO 2935:1974 specifies the dimensional requirements for circular saw blades used in woodworking. The standard defines the relationship between a blade’s outside diameter, its centre (arbour) hole diameter, and blade thickness. It organizes thickness values into four columns that represent approximately constant blade stiffness and gives recommended hole diameters and tolerance classes for common blade sizes (both up to 1 000 mm and for larger diameters).
Key topics and technical requirements
- Scope: Dimensions covered include outside diameters, centre hole diameters and nominal thicknesses for woodworking circular saw blades.
- Thickness classes: Blade thicknesses are arranged into four columns (Column 1–4) so that each column corresponds to an approximate stiffness grouping. This helps match blade stiffness to application and machine setup.
- Diameter ranges: The standard provides dimensional guidance for outside diameters up to 1 000 mm and for larger diameters (e.g., 1 250 mm, 1 600 mm, 2 000 mm), with associated hole diameters and thickness recommendations.
- Arbour hole tolerances: Tolerance classes (notably H9) are called out for particular uses. The standard notes that H9 tolerance is intended for special cases such as stacked blades (machines with multiple blades on one arbour) or blades operating at high speed, where more precise fit is required.
- Tabulated data: ISO 2935 contains tables that map outside diameter to recommended hole diameter and a set of thicknesses corresponding to the four stiffness columns, plus applicable tolerances.
Practical applications
- Blade manufacturers use ISO 2935 to standardize product dimensions, ensuring blades fit common machines and meet expected stiffness/performance.
- Machine designers and OEMs rely on the dimensional data to design spindles, arbors and guards that accept standardized blade sizes and tolerances.
- Purchasing and specifications teams reference the standard when specifying blade procurement to ensure interchangeability and consistent performance.
- Maintenance and quality control use the standard for inspection criteria (checking arbour fit, thickness and conformance to tolerance classes).
- Safety and operations benefit indirectly by ensuring correct blade fit and stiffness, reducing vibration and improving cutting accuracy.
Related standards
- ISO 2935 is produced by ISO Technical Committee on small tools; users should also consult applicable standards for woodworking machinery safety, blade tooth geometry and material specifications when creating complete procurement or compliance documents.
Keywords: ISO 2935, circular saw blades, woodworking, blade dimensions, blade thickness, arbour hole diameter, H9 tolerance, blade stiffness, standard.
