: By specifying performance criteria, the standard also contributes to safety in the workplace. Tool holders that are designed and manufactured according to DIN 16742 - TG5 are less likely to fail during operation, reducing the risk of accidents.
Many molders hesitate to guarantee TG5 for three reasons: din 16742 - tg5
| Feature | TG5 Requirement | | :--- | :--- | | (e.g., fits, mating surfaces) | Very tight (e.g., ±0.03 mm up to 50mm, then increasing). Requires mold design to account for shrinkage precisely. | | Non-Functional (N) (e.g., free edges, bosses) | Standard tight (e.g., ±0.10 mm up to 50mm). | : By specifying performance criteria, the standard also
DIN 16742 - TG5 serves as a pragmatic specification in plastic engineering. It acknowledges that not all plastic parts require the precision of machined metal. By utilizing TG5, engineers can design parts that are functional and manufacturable using materials like Polypropylene or Polyethylene without imposing unrealistic quality constraints, ultimately leading to more robust and cost-effective production. Requires mold design to account for shrinkage precisely
For TG5, the standard explicitly notes that are often insufficient. The feature requires statistical process control (SPC) and frequent CMM (Coordinate Measuring Machine) verification due to the elastic recovery and warpage potential of plastics.
To determine if TG5 is appropriate for a part, engineers should conduct a tolerance analysis: