Applications:
Used when components are delivered with the machining finish untouched, typically internal parts, prototypes, or lower-cost assemblies where aesthetic finish or corrosion durability is less critical.
Advantages:
No additional finishing cost or turnaround time.
Maintains tight dimensional tolerances and retains all machining detail.
Appearance:
Typically shows visible tool/milling marks, natural metallic sheen, perhaps mild surface oxidation or machining artefacts depending on the alloy.
Applicable Materials:
All machinable metals and plastics (e.g., aluminium, stainless steel, brass, etc.).
Important Notes:
This finish offers minimal protection against corrosion or wear beyond the base substrate’s properties. If the part will be exposed to corrosive environment or visible aesthetic requirement, consider an additional finish.
Surface oxidation may begin once exposed; tolerances and functionality should account for potential slight changes.
If the machining operation leaves burrs or surface roughness that could affect mating parts or appearance, further post-machining finishing (e.g., deburring, polishing) may be desirable.
