Custom CNC Machined Stainless Steel Medical Instrument Components

Project Name:Custom CNC Machined Stainless Steel Medical Instrument Components

Customer Region:Germany

Industry:Medical Device

Material:17-4 PH Stainless Steel

Process:Swiss turning, CNC milling, precision deburring, passivation

Order Range:Prototype verification to medium volume production

Our German customer specializes in minimally invasive surgical instruments. They required a batch of small, high-precision stainless steel parts for their new surgical tool assembly. Medical components demand excellent corrosion resistance, burr-free surfaces and repeatable dimensional accuracy. The customer needed a supplier familiar with medical machining standards to produce prototypes first, then ramp up to serial production.

1. Tiny complex features with tight tolerances down to ±0.005 mm; micro holes and thin small lugs are easy to deform during machining.
2. Zero burr requirement. Any residual burr is unacceptable for medical applications.
3. Surface passivation treatment must be consistent to achieve stable anti-corrosion performance.
4. Full material traceability and complete batch inspection records required to meet medical industry quality standards.

Chenrong Technology Solution

1. DFM drawing review: Our engineering team optimized sharp corners into small radii without changing the assembly function, reducing burr formation risk.
2. Swiss-type CNC machining: Adopted Swiss lathe for small slender parts, guaranteeing stable precision for micro features.
3. Multi-stage manual & ultrasonic deburring process, followed by passivation treatment to protect stainless steel against rust.
4. Full dimensional inspection for every piece, CMM and optical comparator testing. We provide material certificates and batch inspection reports for each shipment.
5. Strictly separated production area for medical parts to avoid cross-contamination.

Final Outcome

• Prototypes passed customer lab testing on schedule. All dimensions fully complied with medical drawing specs.
• Burr-free surface and uniform passivation layer met the customer’s medical quality requirements.
• Stable medium volume production, consistent quality between batches.
• Long-term cooperation established; the customer continues to place orders for new instrument variants.

Customer Feedback “Chenrong understands medical machining requirements very well. Precise tiny parts, complete documentation and reliable communication. We are happy to keep this partnership.” — Senior R&D Engineer, German Medical Device Manufacturer