16742 - Tg5 Better — Din

For critical applications in medical devices or automotive under-hood components, TG5 remains the gold standard—just be prepared to pay for the metrology to prove it.

Are you looking to apply these tolerances to a or a particular manufacturing process like injection moulding? Vacuum Casting | FACTUREE – The Online Manufacturer

The allowable deviations scale dynamically based on the size of the nominal dimension. Below is an overview of the dimensional limits for across standard nominal size ranges, mapped against international ISO standard tolerance grades (IT): Nominal Dimension Range (mm) Tool-Fixed Dimensions (ISO IT12) Non-Tool-Fixed Dimensions (ISO IT13) 1 to 6 ± 0.060 mm ± 0.090 mm > 6 to 120 ± 0.110 mm ± 0.170 mm > 120 to 500 ± 0.230 mm ± 0.350 mm > 500 to 1000 ± 0.450 mm ± 0.700 mm

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). din 16742 - tg5

Crucial for dynamic parts like gears or fluid seals where deviations cause failure.

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For comparison, TG7 is typically used for less precise methods like Structure Foam Moulding 3. Key Factors for Success For critical applications in medical devices or automotive

This will allow us to check if TG5 is the right operational target for your project. Share public link

The ability to maintain TG5 tolerances depends on several manufacturing variables outlined in the standard: Material Shrinkage

(affected by the movement of mold components), allowing for more realistic tolerance expectations based on tool mechanics. Supply Chain Alignment : Particularly in the European and German automotive supply chains Below is an overview of the dimensional limits

, which helps calculate specific values based on material and part geometry. www.makrolar.eu Design Note

To successfully produce parts in Series 3 or 4, the following conditions must be met:

: Dimensions affected by moving mould parts (e.g., across the parting line, sliders, or lifters). These require larger tolerances to account for mechanical play in the mould. Standard Acceptance Conditions

Selecting TG5 is a balance between functionality and cost. It is recommended for:

is a specific accuracy class within this standard. In the hierarchy of tolerance groups (TG1–TG9), TG5 is considered a "precise" or "standard precision" class for high-quality injection moulding.