Iso 20457 Tolerance Table Pdf High Quality Jun 2026

Do not default your engineering drawings to TG2 or TG3 unless absolutely necessary. Tightening tolerances exponentially increases mold manufacturing costs and cycle times.

ISO 20457 supersedes the earlier German standard DIN 16742 (originally published in 2013). The new ISO version does not introduce major changes but rather standardizes the well-established German approach at the international level. Manufacturers and engineers accustomed to DIN 16742 will find ISO 20457 familiar and directly applicable.

Injection pressure, melt temperature, hold time, and cooling channel layouts alter the rate at which the polymer chains pack and solidify inside the tool cavity. Best Practices for Using ISO 20457 in Design iso 20457 tolerance table pdf

These tolerances apply to dimensions that are influenced by factors outside of the mold cavity itself.

which includes the first few pages and Table 8 (General Tolerances). Detailed Overviews Do not default your engineering drawings to TG2

Clear reference points to ensure repeatable results. Why ISO 20457 vs. ISO 2768?

The heart of the ISO 20457 tolerance system is its classification into . The standard defines nine tolerance grades, ranging from TG1 (very precise) to TG9 (very coarse). The appropriate tolerance grade depends on the part’s functional requirements, material properties, and manufacturing process capabilities. The new ISO version does not introduce major

The (Tolerance Group 6) is a commonly used general tolerance for simple production settings. Below is the technical data for nominal dimension ranges (all values in mm) as referenced from sources like OKW Gehäusesysteme . Nominal Range (Over) W (Tool-Specific) NW (Non-Tool-Specific)