PRU-160Declared input

Coating growth consumes diameter allowance

Machining · Sheet metal · Casting · Additive manufacturing · Hot-dip galvanizing

Scope and limits

Selected full bore/shaft on explicitly pre-coating geometry: bare diameter minus/plus 2x declared outward per-surface growth versus required final diameter bound. Uniform nominal allowance screen, no deposited-thickness/tolerance certification.

Standards and references

MICRON-COATING-DIMENSIONS-2026

Micron Coatings — Electroless Nickel Coating Thickness

Source scope: Declared pre-coating cylindrical dimensions and actual planned outward growth per surface.
Implementation in Prufi: Supplier example: 10µm nickel thickness reduces bore diameter 20µm. Compare user-declared growth and required finished dimension on selected complete cylindrical void/external surface. Uniform nominal allowance only; no deposit uniformity, etching or tolerance guarantee.

PROTOLABS-COATING-GROWTH-2026

Protolabs — Anodising / Network Powder Coating

Source scope: Declared anodizing or powder coating with actual outward growth, not assumed total film thickness.
Implementation in Prufi: Anodic layer grows both into/out of substrate; outward_growth_mm explicitly supplied. Powder-coating thickness affects precision fits per https://www.hubs.com/knowledge-base/what-is-powder-coating/. No default 50% growth ratio, coating-material approval, masking or spray feasibility inferred.

STEP examples for this check

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