Din 16742 - Tg5

Amorphous polymers display random molecular chains that do not pack tightly upon cooling. This results in low, uniform shrinkage (typically 0.3% to 0.7%), making them ideal candidates for achieving TG5 tolerances easily.

Crucial for dynamic parts like gears or fluid seals where deviations cause failure.

DIN 16742 differentiates between two types of dimensions, which directly impacts how TG5 is applied: din 16742 - tg5

If you need the exact wording, table of TG5 chemical/microstructure limits, or test values from the standard, say whether you want a summary table or the specific numeric requirements and I’ll provide a concise breakdown.

Dimensions formed within a single solid piece of the mold cavity. These have tighter real-world accuracy because they are not affected by tool movements. Amorphous polymers display random molecular chains that do

Precise mold temperature control units (variothermal systems).

For many manufacturers, TG5 is the default starting point. If a design requires tighter tolerances (TG4 or higher), production costs usually increase due to stricter process monitoring and potential tool modifications. Key Factors in DIN 16742 DIN 16742 differentiates between two types of dimensions,

—such as stiffness and shrinkage—rather than just listing specific materials, allowing for more accurate predictions across various resins. Deep Mould Breaking Down TG5 (Tolerance Group 5) Within DIN 16742, "TG" stands for Tolerance Group