Overview
ISO 21537-1:2004 defines standardized clamping flanges for superabrasive cutting-off wheels (diamond saws) used on stationary cutting-off machines for the machining of natural stone. The standard specifies flange types, dimensional requirements, material strength, designation format and marking to ensure safe, interchangeable mounting of large-diameter superabrasive wheels.
Key topics and requirements
- Scope: Dimensions for clamping flanges for mounting superabrasive cutting-off wheels on stationary machines for natural stone.
- Flange types: Two main types are covered - Type N1 (without hole circle) and Type N2 (with hole circle) - with dimension figures and a dimension table provided in the standard.
- Dimensional data: A tabulated set of flange dimensions is specified for different cutting-off wheel outside diameters (see Table 1 in the standard). Designers and manufacturers must follow these dimensions when producing flanges for diamond saws.
- Tolerances: General dimensional tolerances refer to ISO 2768-1 (tolerances for linear and angular dimensions without individual tolerance indications).
- Material requirements: Flanges shall be made of steel, cast steel or spheroidal graphite iron with a minimum strength of 500 N/mm².
- Designation example: The standard provides a designation format, e.g.
Flange ISO 21537-1 - N1 - 1400 × 100 (indicating type, wheel outside diameter D and hole diameter H).
- Marking: Flanges must be indelibly marked with the maximum diameter of the superabrasive cutting-off wheel intended for the relevant machine.
Applications and users
ISO 21537-1 is directly applicable to manufacturers, designers and users involved in the production, procurement and safe operation of diamond cutting-off wheels and their mounting hardware for natural stone machining. Typical users include:
- Machine builders of stationary cutting-off equipment (stone saw manufacturers)
- Abrasive and superabrasive wheel manufacturers
- Tooling and flange fabricators
- Maintenance and safety engineers in stone fabrication shops
- Procurement and quality managers specifying compatible flanges and wheels
Practical benefits include improved interchangeability, predictable mounting performance, reduced risk of mounting errors, and clearer marking for safe wheel selection on stationary machines.
Related standards
- ISO 21537-2 - Clamping flanges for superabrasive cutting-off wheels: Part 2 (Building and construction)
- ISO 2768-1 - General tolerances: linear and angular dimensions
Keywords: ISO 21537-1:2004, clamping flanges, superabrasive cutting-off wheels, diamond saws, natural stone, flange dimensions, ISO 2768.