The standard uses a tiered system to assign tolerance groups (TG) based on the material's complexity and the required precision:
Engineers utilize the as a primary tool to balance part functionality with production economics. Understanding the tolerance groups (TG), material shrink behaviors, and evaluation rules outlined in the standard is critical for successful part design.
Prices typically range from approximately CHF 118 to CHF 200 depending on the format (PDF or hardcopy) and your regional standards body. iso 20457 tolerance table pdf
When to consult the PDF/standard directly
ranging from TG1 to TG10. These groups are further divided into based on production effort: Series 1 (Standard Production): The standard uses a tiered system to assign
Licensed engineering document distributors (like IHS Markit or Techstreet) Conclusion
Here’s a clear, professional write-up on and its tolerance tables, suitable for inclusion in a technical document, training material, or engineering summary. When to consult the PDF/standard directly ranging from
Make sure to verify the authenticity and accuracy of the PDF document before using it for design or manufacturing purposes.
General purpose molding; standard for high-shrinkage materials (e.g., unfilled PP, PE) or non-critical cosmetic parts.
Note: This table represents general dimensional tolerances. For exact allocations based on specific compound shrinkage rates and tool-bound vs. non-tool-bound dimensions, please reference the official ISO 20457 PDF framework. 5. Tool-Bound vs. Non-Tool-Bound Dimensions
for accurate calculations.