[Tight Tolerances / High Cost] [Coarse / Lower Cost] TG1 ---> TG2 ---> TG3 ---> TG4 ---> TG5 ---> TG6 ---> TG7 ---> TG8 ---> TG9 | [Precision Injection] Tool-Fixed vs. Non-Tool-Fixed Dimensions
: Features influenced by moving elements, such as mold splits, slider mechanisms, core pulls, or the dynamic clamping parting line. These require wider tolerance allowances due to microscopic physical movements under high pressure. DIN 16742 TG5 Tolerance Chart
DIN 16742 TG5 represents the standard of excellence for technical plastic parts. It provides engineers with a realistic guide to what can be achieved through disciplined manufacturing. By selecting TG5, designers ensure that their parts will function correctly in complex assemblies while avoiding the prohibitive costs of over-engineering the tolerance requirements.
For technical guidance on applying this standard, designers often use tools like the PolTolerances Software din 16742 - tg5
Injection pressure, cooling rates, and tool temperature. Geometry: The wall thickness and complexity of the part.
An engineer cannot simply apply TG5 to a drawing without evaluating the manufacturing ecosystem. DIN 16742 establishes that a tolerance group is a byproduct of three primary vectors: 1. Material Properties (Molding Compound)
of TG5 values against other tolerance groups for specific dimension ranges? Design Guide Spuitgieten - Pekago Covering Technology [Tight Tolerances / High Cost] [Coarse / Lower
Materials with very high shrinkage or strong anisotropic behaviour (e.g., unfilled PP, unfilled PA6) may still be processed to TG5, but often require more careful process optimisation or moving to Series 2 production.
Selective TG5 application is smarter than blanket tolerancing.
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Choosing means you are specifying a tight, high-accuracy tolerance grade. It is typically applied to functional components that interact closely with other parts, such as gears, snap-fits, medical housings, and automotive electrical connectors. 1. Component Dimensions vs. Tolerance Range
Standard commercial tolerances. These are easier to achieve, more cost-effective, and suitable for consumer goods where minor dimensional variations do not impact performance. 3. Factors Determining TG5 Feasibility
It is typically applied to structural housings, gears, snaps, and multi-component assemblies where interference fits must be avoided.