Tg5 __link__ - Din 16742 -

Establishes rigorous quality control thresholds that minimize field failures. Challenges and Cost Drivers

The Baseline (Standard) Precision level for most industrial injection molding applications.

Are the critical features located across a ? Share public link

What or resin family are you planning to use? What is the largest nominal dimension of your part? din 16742 - tg5

If your part requires semi-crystalline plastics for chemical resistance but needs TG5 tolerances, consider a glass-filled variant to reduce overall shrinkage volatility. Conclusion

Or, in a multi‑component part:

of tolerances for a 10mm and 100mm dimension. Explain the difference between DIN 16742 and ISO 20457. Share public link What or resin family are

Within this standard, represents a high-precision category suitable for parts requiring tight, but still economically viable, dimensional accuracy. What is DIN 16742?

The standard strictly defines surface roughness based on comparator blocks. TG5 requires surfaces to be free from visible sink marks, flow lines, and ejector pin marks that exceed a depth of 0.02 mm. It aligns roughly with Rz 10–20 µm (average maximum height of the profile).

Wear on the mold over time will eventually push parts out of the TG5 threshold if maintenance is neglected. 3. Process Control and Environment Conclusion Or, in a multi‑component part: of tolerances

Single-cavity molds achieve TG5 much easier than high-cavity family molds due to balanced thermal profiles and pressure distribution.

The move from DIN 16901 to DIN 16742, and from TG5 as a simple table look‑up to TG5 as the outcome of a structured, multi‑factor decision process, represents real progress in tolerance engineering for polymers. Understanding TG5 is not merely a matter of quoting numbers from a table; it is about understanding the interplay of material, process, geometry, and quality cost. For engineers working with plastic moulded parts, a solid grasp of DIN 16742 — and of TG5 in particular — is an essential tool in the practical design toolbox.

Features formed by moving components, such as across the mold parting line or by sliding cores. These receive wider tolerances to account for machine clamping variance and tool play. Material Classifications: Amorphous vs. Semi-Crystalline

Hans pointed to the vertical ribs. "You’ve got zero draft here, Elias. If we pull this from the steel, it’ll leave drag marks. But if you add the standard 1.5-degree draft, the top of the rib will be thinner than the bottom. That takes us right out of the at the tip."

The standard defines several – from TG1 (very fine/precision) to TG7 (very coarse).