Yes. First Article Inspection can be arranged when required by the project.

FAI is particularly useful when introducing a new component or approving a new supplier. The first manufactured part or representative production sample is inspected against the engineering drawing and specified requirements before full production proceeds.

An FAI process can help identify issues with dimensions, tolerances, materials, surface finishes and manufacturing processes at an early stage.

Customers who require a specific FAI format or industry-specific documentation should provide the relevant requirements during the quotation stage.

Yes. Material certification can be requested for applicable projects.

Material documentation can help verify the specified material grade and provide traceability between the purchased raw material and the finished components.

For materials such as 316L stainless steel, titanium alloys, aluminum alloys or engineering plastics, customers may specify the required certificate or material documentation in the RFQ.

If material traceability is important for your application, please state this requirement before production. This allows the appropriate purchasing, identification and documentation procedures to be incorporated into the project.

Yes. CMM inspection can be arranged for components where dimensional verification is required.

A coordinate measuring machine can be used to verify critical dimensions, positions, geometric relationships and other drawing requirements.

For complex CNC machined components, CMM inspection can be particularly useful because multiple features may need to be evaluated relative to datums rather than measured independently.

If a customer requires a CMM report, the drawing should identify the critical dimensions and relevant datums. This allows the inspection process to be planned efficiently and ensures that the report focuses on the requirements that are functionally important.

Our quality control process covers multiple stages of production rather than relying only on final inspection.

The process can include:

IQC — Incoming Quality Control:
Verification of incoming materials and relevant documentation.

IPQC — In-Process Quality Control:
Inspection of first articles and critical dimensions during machining.

FQC — Final Quality Control:
Final dimensional, visual and functional checks before shipment.

Depending on the project, inspection equipment can include CMM, optical measurement systems, height gauges, surface roughness measurement equipment and material analysis equipment.

For critical components, additional inspection requirements such as first article inspection, material traceability and dimensional inspection reports can be discussed before production.

Yes. RuiXing MFG operates under an ISO 9001:2015 quality management system. ISO 9001 provides a framework for controlling manufacturing processes, documentation, inspection and continuous improvement. For CNC machining projects, certification is only one part of quality assurance; actual process control and inspection are also important. Our quality processes include incoming material inspection, in-process quality control and final inspection. Inspection methods are selected according to the component's material, dimensions, tolerances and customer requirements. For projects requiring specific quality documentation, customers can communicate their requirements during the quotation stage so that the appropriate inspection and reporting process can be planned.

Yes. PVD adds a thin coating layer to the surface, so it should be considered when machining components with tight dimensional or fit requirements.

The dimensional effect depends on the coating system and coating thickness. External dimensions may increase slightly, while internal holes or threads may effectively become smaller.

For non-critical decorative surfaces, this may not be significant. However, for precision holes, threaded features, sliding surfaces or mating components, the coating thickness and masking strategy should be considered before machining.

For this reason, PVD requirements should be included in the RFQ and drawing whenever dimensional control after coating is important.

For PVD-coated CNC parts, we recommend providing as much of the following information as possible:

- Base material and grade
- PVD coating type
- Required color or appearance
- Coating thickness, if specified
- Surface roughness before coating
- Critical dimensions
- Thread and hole requirements
- Areas that must be masked
- Adhesion or hardness requirements
- Quantity
- Application environment

This information is important because PVD is not simply an appearance treatment. The coating process can affect critical dimensions, especially where tight-fitting holes, threads or mating surfaces are involved.

For precision parts, we recommend evaluating the pre-coating dimensions and final coated dimensions together.

Yes. PVD coating is available as part of our surface finishing capabilities for suitable CNC machined components.

                                                                                                                                                                                                                 

PVD, or Physical Vapor Deposition, is a vacuum-based coating process used to deposit a thin functional or decorative coating onto a component surface. Depending on the selected coating system, PVD can improve surface hardness, wear resistance, friction characteristics and appearance.

                                                                                                                                                                                                                                                  

For CNC machined components, PVD should be considered together with machining tolerances and surface preparation. Coating thickness, masking requirements and the geometry of holes, threads and mating surfaces can affect the final component.

                                                                                                                                                                                                                                

For critical applications, PVD specifications should be defined during the RFQ stage rather than simply specifying “PVD coating.”

Surface finishing can be arranged according to the material, application and appearance or functional requirements of the component.

- Available options include:

- Anodizing
- Hard anodizing
- Sandblasting
- Polishing
- Electropolishing
- PVD coating
- Electroplating
- Black oxide
- Chromate conversion coating
- Powder coating
- Painting
- PTFE coating
- Laser engraving
- Screen printing
- Paint filling
- MoS₂ coating

Not every surface treatment is suitable for every material. For example, anodizing is primarily associated with aluminum, while PVD, polishing and electropolishing can be used for certain stainless steel applications.

The required material and finish should therefore be specified together when requesting a quotation.

Ra 0.8 μm can be achievable for suitable machined surfaces, but surface roughness depends on material, tool geometry, machining parameters, tool condition and the geometry of the surface.

A narrow internal pocket, deep cavity or difficult-to-access feature may have different achievable roughness from a large flat external surface.

If a specific surface requires Ra 0.8 μm or another roughness value, the requirement should be identified on the drawing.

We can also provide additional finishing processes such as polishing, electropolishing, grinding or other treatments where appropriate for the application.