Surface Finishes and Acceptance
Define appearance, functional surfaces and final dimensions together so the finishing scope matches your component.
Quote
24 h
Certification
ISO 9001
Drawings
STEP, IGES, PDF
What This Page Covers
Start with the Requirement
Specify what the finish must achieve: an appearance, a defined surface condition, protection or a functional requirement. Include the applicable specification and acceptance method where required. A color name alone does not define the complete finishing scope.
Finish Machined Assembly Parts
Anodizing, plating, passivation, coating or other finishing processes may be discussed where suitable for the material and project. Confirm the actual available process, required condition and included scope. Identify fitting surfaces, threads or electrical contact areas that need special treatment or protection.
Define Tooling Surface Needs
For stamping die components, keep surface treatment connected to material, hardness and the working feature. For injection mold components, identify forming, shutoff, sliding and fitting surfaces separately. A general instruction to polish the part may be too broad for those different functions.
Protect the Critical Interfaces
Mark surfaces that must be masked, protected or accepted in a defined final condition. Confirm how coating, polishing or other treatment affects the agreed fit and inspection basis. The process route should address these requirements before the finishing operation starts.
Agree the Visual Standard
Where appearance matters, agree a reference sample or another suitable acceptance method. Specify the relevant surfaces and viewing conditions rather than relying only on a screen image. Keep cosmetic acceptance separate from dimensional, roughness or functional requirements.
Check the Delivered Condition
Define the checks and records required after finishing, including any dimensions, surface measurements or treatment documents. Confirm the responsible process provider and the connection between the record and the delivered parts. Only the agreed scope should be described as included.
01Can I choose a finish by color only?
Color may be one requirement, but also specify the process, relevant standard and functional or dimensional requirements where needed.
02Are all finishes performed in-house?
Do not assume that. The process owner and any external provider should be identified in the agreed manufacturing scope.
03Should I mark areas that must not be coated?
Yes. Identify masking or protection requirements on the drawing or an approved finishing instruction.
04Are tolerances checked before or after finishing?
State the required acceptance condition for each affected feature. Resolve this before the manufacturing route is approved.
05Does a polished surface prove a roughness value?
No. A specified roughness value requires an agreed measurement method. Appearance alone is not the same evidence.
06Can a photo be the only color reference?
A screen image may be useful for discussion but can be insufficient for visual acceptance. Agree a suitable reference or inspection method.
07Do stamping die parts need the same finish as CNC housings?
Not necessarily. Tooling surface requirements should follow material, working function and the specified treatment rather than a general cosmetic option.
08Can all mold surfaces be polished identically?
The forming, fitting, sliding and sealing functions may require different conditions. Identify the relevant surfaces and acceptance requirements separately.
09Can a finish be changed on a repeat order?
A change may affect fit, appearance or performance requirements. Review and document it before treating the earlier approval as applicable.
10What should I include in a finishing RFQ?
Include material and condition, process or specification, affected surfaces, masking, final dimensions and the visual or measurement acceptance method.
Discuss Your Requirements
Share your part type, current drawing revision and the question you need to resolve. Include the quantity and delivery destination when a quotation is required.