TG5 is widely regarded as the . While groups like TG1 through TG3 are reserved for extreme precision (often requiring specialized high-stability materials and rigorous process control), TG5 is used for:
Parts where functional fit is important but doesn't require extreme sub-millimeter precision.
DIN 16742 requires that dimensions be measured under specific , usually 16 to 24 hours after molding at a standard atmosphere of 23°C and 50% humidity. din 16742 - tg5
Plastics are categorized by their . Crystalline materials (like POM or PA) tend to shrink and warp more than amorphous materials (like ABS or PC), which can move a part out of a specific TG rating if not managed. 3. Production Environment
Understanding DIN 16742 - TG5 is the central German engineering standard for determining tolerances in plastic molded parts. Within this framework, TG5 (Tolerance Group 5) represents the "baseline" or "standard" precision level for modern injection molding. TG5 is widely regarded as the
Products that need a clean aesthetic and reliable assembly.
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 Plastics are categorized by their
Cases and housings where dimensional stability is necessary for snap-fits or screw bosses.
The standard doesn't just provide a table of numbers; it calculates tolerances based on several variables: 1. Mold-Fixed vs. Non-Mold-Fixed Dimensions
Dimensions determined by a single part of the mold tool. These are typically more accurate.