: The part was deep, requiring a significant draft angle to ensure it didn't scratch or get stuck when ejected from the mold. The Friction Point
: Engineers are advised by firms like Pekago Covering Technology to design parts at the "middle" of the tolerance field to allow for material fluctuations.
To successfully implement DIN 16742 TG5 on your engineering drawings, apply these design principles:
Dimensions affected by moving tool parts, such as sliders, cores, or the parting line. These usually have wider tolerances because they are subject to tool opening/closing variances. 2. Material Behavior din 16742 - tg5
By specifying DIN 16742 TG5 appropriately, engineers can ensure high-performance plastic components without unnecessary costs. If you'd like to dive deeper, I can:
: Shrinkage properties of different polymers (e.g., PP vs. ABS) will affect how easily TG5 is achieved.
DIN 16742 splits plastics into three groups for tolerance calculation: : The part was deep, requiring a significant
The tolerance value depends on the part’s nominal dimension (longest overall length or specific feature size). Common ranges include:
For precision requirements (e.g., bearing bosses, mating surfaces), individual GD&T notes must override the default.
It classifies materials into different accuracy groups, which then determine the applicable Tolerance Group. Deep Dive into Tolerance Group 5 (TG5) These usually have wider tolerances because they are
Materials like Polyamide (Nylon) absorb ambient moisture, which causes them to swell over time. For TG5 components made of hygroscopic materials, dimensional checks must be performed only after the parts have reached structural equilibrium (conditioned state). 6. Conclusion
: He referenced the DIN 16742 Table 8 , ensuring every functional dimension was explicitly toleranced against the TG5 series.