Clear quality expectations prevent most problems with overseas orders. Use this CNC parts quality inspection checklist to align with your supplier before production and to evaluate parts when they arrive.
Before Production
- Drawing revision confirmed in writing
- Critical-to-function dimensions highlighted
- Material grade and certificate requirement agreed
- Finish, color standard and cosmetic surfaces defined
- Inspection method and sample size agreed
First Article Inspection (FAI)
For new parts, ask for a first article: one or a few parts measured fully against the drawing before the batch. Approve it with photos and a dimensional report, or have the sample shipped to you.
During Production
- In-process checks on critical dimensions
- Tool wear monitoring on long runs
- Separation of conforming and non-conforming parts
Final Inspection Checklist
| Check | Method |
|---|---|
| Critical dimensions | Calipers, micrometers, gauges, CMM |
| Threads | Go / no-go thread gauges |
| Surface finish | Visual + roughness tester if specified |
| Anodizing / plating | Color vs approved sample, coverage, thickness if specified |
| Burrs and sharp edges | Visual and touch |
| Quantity and labeling | Count against packing list |
| Packaging | Individual protection, no part-to-part contact |
When Parts Arrive
Inspect a sample from each batch, check critical dimensions and report issues with photos within an agreed period. Good suppliers use feedback to improve the next batch.
Learn about our quality approach on the OEM manufacturing page and home page.
Get a Quote for Your Parts
Send your drawing (PDF, STEP or DWG) with quantity, material and finish. An engineer from Zhufeng Precision will review it and reply within 24 hours.
FAQ
What is a first article inspection?
A complete measurement of the first part(s) produced, approved before the full batch is made.
Should I ask for a dimensional report?
Yes for critical parts. A report on critical dimensions is a simple way to verify conformity.
How should machined parts be packed?
Individually protected so finished surfaces do not touch, then packed in cartons or wooden cases.