Choosing the right CNC machining partner determines whether your project ships on time, on tolerance and on budget. Here is a practical checklist for vetting suppliers — especially when sourcing from China.
Certifications
Look for IATF16949 (automotive), ISO 9001 (quality management) and ISO 13485 (medical). Certifications signal that processes are documented and audited, not improvised.
In-House Capability
A supplier that does turning, milling, 5-axis, sheet metal, stamping and finishing in-house avoids outsourcing delays and quality gaps. Ask about machine count and types.
Quality Control
Ask about inspection equipment — CMM, gauges and vision systems — and whether they provide full inspection reports and traceability with every shipment.
Communication
Clear, responsive communication matters as much as machines. A good supplier answers DFM questions quickly, explains options and gives honest lead times.
Delivery & Samples
Order a sample or small batch first to verify quality and communication before committing to volume. Evaluate packaging and on-time delivery.
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