Overview
ISO 21949:2024 - Coated abrasives - Plain sheets with holes for dust extraction defines the nominal dimensions, tolerances and designation of plain abrasive sheets with holes designed for dust extraction. Intended for use on sanders with dust extraction systems, this second edition updates the 2001 version by adding a new Type H and new/updated dimensions for several types. The document also accounts for extra length and specifies test-conditioning requirements referenced to ISO 554.
Key topics and technical requirements
- Types and dimensions: Detailed geometries for sheet Types A–H are given (figures and a tabulated set of nominal sizes and hole layouts).
- Tolerances: Limit deviations for dimensions are specified in Table 1; tolerances apply under defined test conditions.
- Test conditions: Conditioning and testing atmospheres follow ISO 554 - temperature 20 °C ± 2 °C and relative humidity 65 % ± 5 %; sheets must be stored at these conditions for at least 24 hours before testing.
- Designation rules: A plain sheet is designated by product name, reference to ISO 21949, type (A–H) and dimensions (T × L in mm).
- Marking requirements: Sheets shall be marked with grain size and the manufacturer/supplier/importer or registered trademark.
- Document changes (2024): Addition of Type H, dimensions added for B, C, F and H, and an added dimension in Table 1 for Type B.
Applications and who uses this standard
ISO 21949:2024 is practical for:
- Manufacturers of coated abrasives - to design and produce sheets that fit extractor-equipped sanders and meet international dimensional standards.
- Sander and power-tool OEMs - to ensure compatibility of abrasive sheets with dust extraction ports and clamps.
- Purchasing and specification professionals - for procurement specs and product datasheets to guarantee interchangeability.
- Quality control and testing laboratories - for dimensional verification and conditioning procedures.
- Distributors and trade organizations - to mark and label products consistently for international markets.
Related standards
- ISO 554 - Standard atmospheres for conditioning and/or testing (referenced for test conditions).
Keywords: ISO 21949:2024, coated abrasives, plain sheets, holes for dust extraction, abrasive sheets, sanders, dimensions, tolerances, designation, marking.
