- Tg5 ((exclusive)): Din 16742

A very specific request!

Reflect typical standard commercial production tolerances.

To check compliance with DIN 16742 TG5:

Unlike tolerance standards originally developed for metal parts, DIN 16742 recognises that polymers behave fundamentally differently during processing and in service. Plastics exhibit anisotropic shrinkage, viscoelastic behaviour, and strong dependence on processing parameters such as injection pressure, holding pressure, mould temperature, and melt temperature. din 16742 - tg5

DIN 16742 is a German manufacturing standard published by the Deutsches Institut für Normung (DIN). It provides a structured system for determining dimensional tolerances and variations in plastic molded parts. The standard covers injection molding, compression molding, injection compression molding, and rotational molding.

Many molders hesitate to guarantee TG5 for three reasons:

by precision-focused suppliers (compared to TG7 or TG8, which are used for looser processes like Structural Foam Moulding). Achievability: A very specific request

The TG5 specification within DIN 16742 refers to a particular type of tool holder interface. The nomenclature can vary, but TG5 typically denotes a specific design or performance criterion that tool holders must meet. This could involve the geometric accuracy of the tool holder, its balancing class, or its material composition. The exact requirements of TG5 are detailed within the DIN 16742 standard and are designed to ensure compatibility, precision, and reliability in high-speed machining applications.

Even for very small dimensions, a tolerance smaller than ±0.1 mm is generally not economically feasible for most injection moulding processes.

: It is typically used for functional parts with moderate to high dimensional accuracy requirements, such as precision mechanical components or mating interfaces. Even for very small dimensions

of the different tolerance values for various nominal dimensions under TG5? Design Guide Spuitgieten - Pekago Covering Technology

These materials exhibit low and isotropic (uniform) shrinkage. They easily achieve TG5 tolerances.

Here's a brief overview: