Din 16742 - Tg5

Standard commercial tolerances for general-purpose plastic parts. Breaking Down the TG5 Tolerance Group

Crystalline materials (like PBT or PA) shrink and warp more than amorphous ones (like ABS or PC), which can push your part out of the TG5 field if not managed Pekago Covering Technology Wall Thickness:

Initially specified TG5 for all dimensions. After mold flow analysis, only the pin grid array (PGA) zones were mapped to TG5. The outer shell was relaxed to TG4. din 16742 - tg5

These resins experience high, anisotropic (un-uniform) shrinkage. Achieving TG5 with semi-crystalline resins requires precise mold temperature regulation and often glass-fiber reinforcement to stabilize dimensions. 2. Tooling and Mold Construction

production level. It is tighter than the standard TG6 but less extreme than the tool-room limits of TG3 or TG4. Application The outer shell was relaxed to TG4

DIN 16742 standardizes these fluctuations by breaking them down into ranging from TG1 (extreme precision micro-molding) to TG9 (coarse parts with highly unpredictable shrinkage). 🎯 Demystifying the TG5 Classification What is TG5?

The tolerance value depends on the part’s nominal dimension (longest overall length or specific feature size). Common ranges include: snap-fits or bearing housings). Cost vs.

: TG5 is considered the standard precision category. It is often applied as a general tolerance across various plastic materials, such as ABS or PC+ABS, to ensure a balance between manufacturing cost and part quality.

TG5 is often characterized as a . It is stricter than general commercial molding standards (like TG6 or TG7) but does not demand the extreme, costly controls required by High Precision (TG1–TG2).

: It is often specified for "hard" plastic components or multi-component parts where a more accurate fit is needed (e.g., snap-fits or bearing housings). Cost vs. Accuracy