| TG level | Typical use | Relative cost | Mold precision needed | |----------|-------------|---------------|------------------------| | TG1–TG2 | Medical, optical, micro parts | Very high | Precision tooling, hard steel | | TG3–TG4 | Precision fits, moving parts | High | Good toolmaking | | | General mechanical parts | Standard | Standard CNC mold | | TG6–TG7 | Non-critical covers, spacers | Low | Less precise mold |
: Dimensions formed within a single mold half; these typically allow for tighter tolerances. Non-tool-specific (NW) din 16742 - tg5