16742 - Tg5 !!top!! | Din

Semi‑crystalline plastics shrink more in the flow direction than across it (anisotropy). A TG5 specification on a drawing does not magically eliminate this behaviour; the designer must still account for anisotropic shrinkage in the mould design and in any critical mating features.

Consult your molding partner during the DFM (Design for Manufacturing) stage to align your TG5 requirements with their machine capabilities and tool design.

Discuss material choice with your molder, as some materials make TG5 difficult to achieve.

While the query focuses on DIN 16742, it is essential to note that is the internationally recognized version that effectively succeeds DIN 16742. They are very similar, but for new projects, designers are often encouraged to use the ISO standard. Both standards ensure that:

Reserved for hyper-precision or highly specific laboratory-grade tooling configurations.

While the exact matrices should be cross-referenced with the official DIN 16742 text, the following values illustrate how a TG5 tolerance window scales based on feature size for standard tool-dependent dimensions: Nominal Dimension Range (mm) Approximate TG5 Tolerance Window (± mm) Up to 3 mm ± 0.05 mm 3 mm to 6 mm ± 0.07 mm 6 mm to 10 mm ± 0.09 mm 10 mm to 18 mm ± 0.11 mm 18 mm to 30 mm ± 0.14 mm 30 mm to 50 mm ± 0.18 mm 50 mm to 80 mm ± 0.23 mm 80 mm to 120 mm ± 0.29 mm