Iso 20457 Tolerance Table Pdf May 2026

ISO 20457

Here’s a clear, professional write-up on and its tolerance tables, suitable for inclusion in a technical document, training material, or engineering summary.

If you are looking at a PDF of the standard, you will locate the relevant row based on the basic size of the component. You will then cross-reference that row with the column corresponding to the specific feature (e.g., shaft diameter vs. bore diameter). The result is a plus/minus value or a bilateral tolerance that defines the acceptable window of measurement. iso 20457 tolerance table pdf

  1. ISO Store (iso.org): The official source. You can purchase the PDF for CHF 118 (approx. $130 USD). You get a watermarked, certified copy.
  2. ANSI Webstore (webstore.ansi.org): For US customers, this often provides the ISO standard in a re-branded format.
  3. BSI Group (bsigroup.com): For UK and European customers.
  4. National Libraries: In some countries, national standards are available for free reading (not downloading) at designated libraries or university engineering departments.
  5. Engineering Software Suites: Some CAD packages (Siemens NX, SolidWorks, CATIA) license ISO standards internally. If your company has a subscription, the tolerance tables may be embedded in the tolerancing tool.

: Materials are categorized (typically Categories 1–4) based on their shrinkage properties. Precision Classes Class A (High Precision) ISO 20457 Here’s a clear, professional write-up on