A typical tolerance table in this standard will include:
To correctly utilize an ISO 20457 tolerance table, designers must first categorize their polymer based on its compound characteristics and structural stiffness. TOLERANCES
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The tables are arranged in rows corresponding to the size of the feature being measured. Standard step ranges typically look like this: Up to 3 mm 3 mm to 6 mm 6 mm to 10 mm 10 mm to 18 mm 18 mm to 30 mm (And so on, up to 1000 mm)
(e.g., glass fibers) reduce shrinkage but introduce anisotropy (different shrinkage rates parallel and perpendicular to the flow). 4. Post-Molding Environmental Factors A typical tolerance table in this standard will
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The standard uses a tiered system to assign tolerance groups (TG) based on the material's complexity and the required precision: Standard step ranges typically look like this: Up
Find the size row of your feature (e.g., 1–3mm, 10–18mm, 50–80mm).
General tolerances for plastic molded parts according to ISO 20457 – TG6.