Din 16742 - Tg5 High Quality [ 99% DIRECT ]

All tolerances in DIN 16742 are . If asymmetrical tolerances (e.g., fit dimensions) are required, they must be converted to a symmetrical tolerance field location by formally modifying the nominal dimension to the tolerance mean dimension C: 100-0.6 → 99.7 ± 0.3 .

DIN 16742 is closely linked to the international standard (or ISO 20457), which covers the same subject — tolerances for plastic moulded parts — at an ISO level. In practice, the two standards are used interchangeably; many companies and software tools support both. The primary difference is that DIN 16742 retains some German‑specific details and references, while ISO 20457 is intended for global application. For most practical engineering purposes, TG5 values in DIN 16742 align with the corresponding tolerance class in ISO 20457.

If a manufacturer were to specify TG1 for a semi-crystall

If you want to apply this standard to a specific project, let me know: What you plan to use The nominal dimensions of your most critical features If these features cross a mold parting line or slide Share public link din 16742 - tg5

The standard differentiates between two types of dimensions:

It reflects what is technically achievable via the injection molding process.

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 All tolerances in DIN 16742 are

(Note: Data derived from the baseline ISO basic tolerance grades assigned across standard DIN 16742 tables. For dimensions outside 1–1000mm or wall-thickness specifics, direct manufacturer alignment is mandatory).

[TG1 - TG2] --------> [TG3 - TG4] --------> [TG5 - TG6] --------> [TG7 - TG9] Precision Precision Commercial Coarse/Large (Toolmaking) (Industrial) (Standard MFG) (Low Accuracy)

Standard commercial tolerances. These are easier to achieve, more cost-effective, and suitable for consumer goods where minor dimensional variations do not impact performance. 3. Factors Determining TG5 Feasibility In practice, the two standards are used interchangeably;

: Dimensions formed by a single part of the mold (e.g., within one cavity half). These typically have tighter tolerances.

The mold cavity must be cut to tolerances much tighter than TG5 itself to account for inevitable tool wear over hundreds of thousands of cycles.

Disclaimer: DIN 16742 has been largely replaced by ISO 20457. However, many industries still refer to DIN 16742 in existing blueprints and procurement documentation. Always clarify the standard used with your supplier. If you want, I can:

If you are currently setting up a production run, I can help you verify your design metrics. Please let me know: