Shenzhen CNC Machining Guide | How to Choose a Precision Supplier
This Shenzhen CNC machining guide explains how to choose a precision supplier: what tolerance, equipment, certifications and prototyping steps matter, based on CHX Metal's decade of experience in Bao'an, Shenzhen.
Key Specs to Request
- Dimensional tolerance (±0.005mm achievable)
- Concentricity (±0.005mm)
- Inspection method (CMM)
- Material certificate
- Surface finish
Equipment to Look For
- 5-axis machining centers
- Branded machining centers (Taikan, etc.)
- CMM and measuring equipment
- In-house surface treatment
Certifications
- ISO 9001:2015 (minimum)
- ISO 14001
- IATF 16949 for automotive
- Material traceability
Prototype First
Always machine 3–5 sample pieces first to verify quality before committing to volume.
Shenzhen CNC Guide FAQ
- Q: What tolerance should a precision supplier achieve?
- ±0.005–±0.01mm dimensional and ±0.005mm concentricity with CMM verification.
- Q: Why prototype before volume?
- Machining 3–5 samples verifies quality, fit and process stability before mass production.
- Q: Which certifications matter?
- ISO 9001:2015 minimum; IATF 16949 for automotive; ISO 14001 for environmental management.
- Q: Why choose Shenzhen?
- Mature supply chain, fast lead times, competitive cost and integrated finishing.
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