Quality control is integrated throughout our CNC machining process, from material verification and first-piece inspection to in-process checks and final inspection. We inspect critical dimensions, tolerances, threads, surface finish and other customer-specified requirements using appropriate measurement equipment.
Quality Control from Material to Finished Part
Our inspection process follows the production flow to help identify potential issues at the appropriate stage. Inspection methods are selected according to part geometry, dimensional requirements, material and customer specifications.
Material Verification
Raw materials are checked against the required material specification and project requirements before production.
First-Piece Inspection
Initial parts are inspected after machining setup to verify critical dimensions and confirm that the process meets the approved drawing requirements.
In-Process Inspection
Critical dimensions are checked during production, particularly for parts involving multiple machining operations or tight dimensional requirements.
Final Dimensional Inspection
Completed parts are inspected against the drawing, including critical dimensions, tolerances, threads, holes and other specified features.
Surface & Appearance Check
Parts are checked for specified surface finish and visible issues such as burrs, scratches, dents or machining marks.
Inspection results and quality documentation can be prepared according to project requirements before parts move to packaging and shipment.
Inspection Equipment
We use different measurement tools according to the geometry, tolerance and inspection requirements of each component.
CMM
For dimensional measurement and verification of complex features, profiles and critical part dimensions.
Micrometers & Calipers
For accurate measurement of diameters, thicknesses, lengths and other dimensional features during production and final inspection.
Height Gauges
For measuring heights, positions and dimensional relationships from a controlled reference surface.
Thread Gauges
For checking internal and external thread requirements and verifying thread conformity.
Surface Roughness Tester
For measuring surface roughness where a specific surface finish requirement is defined on the drawing or specification.
Material Verification
Material grade and supporting documentation can be verified according to project requirements.
What We Inspect on CNC Machined Parts
| Inspection Item | What We Check |
| Dimensions | Length, diameter, thickness and other specified dimensions |
| Tolerances | Dimensional requirements shown on customer drawings |
| Holes & Profiles | Hole diameter, position, depth, slots and machined profiles |
| Threads | Internal and external thread requirements |
| Surface Finish | Surface roughness where specified |
| Appearance | Burrs, scratches, dents and visible machining defects |
| Material | Material grade and related documentation where required |
Inspection During CNC Production
Catching Dimensional Issues Before Final Inspection
For parts with critical dimensions or multiple machining operations, inspection can be performed during production rather than waiting until all machining is complete. Operators can check key features at appropriate stages and make process adjustments when necessary.
This approach helps reduce the risk of dimensional deviations continuing through subsequent operations and provides better control over parts that require multiple machining steps.
Final Inspection Before Shipment
Verifying Finished Parts Against Your Requirements
Before shipment, finished CNC parts can undergo final inspection according to the approved drawings, specifications and agreed inspection requirements. Critical dimensions, threads, holes, surface condition, quantity and other specified characteristics are checked as applicable.
For projects requiring inspection documentation, relevant measurement results and quality records can be prepared according to the agreed requirements.
Quality Documentation
Inspection Records for Your Project
Quality documentation can be provided according to customer and project requirements. Depending on the order, documentation may include:
Dimensional Inspection Report
Inspection Records
Material Certificate
EN 10204 3.1 Material Certificate
Certificate of Conformance (COC)
Customer-Specified Quality Documents
Documentation requirements can be confirmed before production so that the required records are prepared together with the order.
Measurement Records & Traceability
Keeping Production Information Connected
Clear identification helps connect materials, production orders, parts and inspection records throughout the manufacturing process. Where required, information such as part number, material grade, quantity, production status and inspection records can be maintained according to project requirements.
This helps reduce the risk of material or order mix-ups and provides clearer production information for custom CNC machining projects.
Inspection According to Your Drawing & Specifications
Every CNC machined part is inspected according to the approved drawing, specifications and agreed quality requirements. We focus on critical dimensions, tolerances, threads, holes, surface finish and other features that affect part fit and function.
Inspection methods are selected according to the part geometry and measurement requirements. Inspection records can also be provided according to the agreed project requirements.
Your Requirements → Critical Features → Inspection → Measurement Records
Quality Inspection in Our CNC Factory
Take a closer look at our inspection activities, including dimensional measurement, thread inspection, surface testing and final part verification.
FAQ
Q: How do you inspect CNC machined parts?
A: We use dimensional measurement, thread inspection, surface inspection and other methods according to the part geometry, drawing requirements and specified tolerances.
Q: Do you inspect parts during production?
A: Yes. For critical dimensions and suitable production requirements, in-process inspection can be performed during machining to identify dimensional deviations before final inspection.
Q: What inspection equipment do you use?
A: Inspection equipment may include CMMs, micrometers, calipers, height gauges, thread gauges and surface roughness testers.
Q: Can you provide an inspection report?
A: Yes, inspection documentation can be provided when required by the customer or project specification. The required report format and inspection scope can be confirmed before production.
Q: Can you provide material certificates?
A: Material certificates can be supplied when required. EN 10204 3.1 documentation can be provided for projects where this requirement is specified.
Q: Can you inspect parts according to our drawings?
A: Yes. Inspection can be based on customer drawings, dimensional tolerances, material specifications, surface finish requirements and other agreed quality criteria.