Iso 20457 Tolerance Table Pdf Jun 2026

Note: The format +X / 0 indicates that the pipe can be larger than nominal by X mm, but cannot be smaller than the nominal size (ensuring it can seal).

Specifying functionally required tolerances based on polymer behavior. Toolmakers Agreeing on shrinkage compensation and tool contour limits. Quality Engineers Applying acceptance criteria in production control plans. Tolerance Group (TG) table breakdown for a particular nominal dimension range? TOLERANCES

Understanding where ISO 20457 fits in the standards landscape helps justify its use to colleagues.

⚠️ These values are industry guidelines. For definitive figures, always refer to the official ISO 20457 standard. iso 20457 tolerance table pdf

The official PDF contains worked examples and the calculation formulas — but not a single lookup table like ISO 2768.

A true “tolerance table” in ISO 20457 depends on:

In practice, ISO 20457 defines based on: Note: The format +X / 0 indicates that

The standard, which replaced DIN 16742, defines the tolerances and acceptance conditions for plastic molded parts. It uses Tolerance Groups (TG) to classify accuracy based on material properties and manufacturing processes. Key Tolerance Group: TG6

Ultimate Guide to ISO 20457 Tolerance Tables for Plastic Molded Parts

Common pitfalls

To standardize expectations between designers and molders, the International Organization for Standardization introduced . This standard replaces the older DIN 16742 standard and provides a robust framework for determining geometric tolerances and deviations.

The appropriate TG depends on the specific plastic material used, its filler content, and the precision capabilities of the molding process. Tolerance Grade Process and Material Capability Cost Impact

The International Organization for Standardization established (which superseded the older DIN 16742 standard) to create a unified global framework for tolerancing molded plastic parts. What is ISO 20457? ⚠️ These values are industry guidelines