Iso 20457 Tolerance Table Pdf Jun 2026

The standard uses a tiered system to assign tolerance groups (TG) based on the material's complexity and the required precision:

Here’s a clear, professional write-up on and its tolerance tables, suitable for inclusion in a technical document, training material, or engineering summary. iso 20457 tolerance table pdf

Unlike specific tolerance standards that apply to one type of feature (like ISO 286 for holes and shafts), ISO 20457 provides a . It helps design engineers and quality managers group parts based on their precision needs. The standard uses a tiered system to assign

| Feature | ISO 2768-1 | ISO 20457 | |-------------------------|--------------------------------|--------------------------------------| | Applicable to | Machined parts | Moulded parts (plastic, rubber, die cast) | | Has a simple table? | Yes (f, m, c, v classes) | No — calculation-based | | Considers shrinkage? | No | Yes | | Draft angles included? | No | Yes (separate section) | | Feature | ISO 2768-1 | ISO 20457

– Plastics — Tolerances for moulded parts – is an international standard that specifies a system of tolerances for the general dimensions of injection-moulded and compression-moulded plastic parts. It replaces the now-withdrawn national standards such as DIN 16901 (Germany) and provides a globally harmonized approach.

Key structure of the tolerance table (typical elements)