Cnc Milling Medical Metal Parts 17-4ph Stainless Steel Infusion Needle

Product Description

CNC Milled Medical Metal Components: 17-4PH Stainless Steel Liquid Filling Needles are high-performance, precision-engineered instruments designed for critical fluid delivery applications in medical and pharmaceutical settings. Manufactured from premium 17-4PH (UNS S17400) precipitation-hardening stainless steel, these needles offer an exceptional combination of high strength, excellent corrosion resistance, and superior wear characteristics. Through advanced multi-axis CNC milling and Swiss-type machining, we produce complex needle geometries with precise internal lumens, custom tip configurations, and integrated connection features. The material's ability to achieve high hardness (40-48 HRC) through post-machining aging treatment ensures dimensional stability and long-term reliability in demanding filling and dispensing applications. Ideal for automated filling systems, drug delivery devices, and laboratory instrumentation, each component is meticulously crafted to meet stringent medical device quality standards .

Product Processing

1. Material Selection & Verification: Certified 17-4PH stainless steel bar stock is selected in the solution-annealed (Condition A) state for optimal machinability. Material certifications are verified, and the stock is cut to optimized blank sizes .

2. Engineering Analysis & DFM: Technical review of customer 3D models and 2D drawings to optimize design for manufacturability, considering material characteristics, heat treatment requirements, and functional specifications.

3. Precision CNC Machining (Core Process): Execution on advanced 3, 4, or 5-axis CNC machining centers and Swiss-type lathes:

   • Swiss Machining: For long, slender needle geometries with tight concentricity requirements, utilizing guide bushings for exceptional support close to the cutting tool .

   • Deep Hole Drilling/Gun Drilling: Creating precise, straight internal lumens with excellent surface finish and dimensional control.

   • Feature Machining: Creating complex tip geometries, side ports, threads (internal/external), luer connections, and mounting features.

   • Cutting Parameters: Optimized toolpaths with appropriate cutting speeds and feeds to manage work hardening and achieve superior surface finishes .

4. Heat Treatment (Precipitation Hardening): After machining in the soft Condition A state, components undergo a controlled aging treatment (typically H900 condition: 480°C for 1 hour) to achieve target hardness (40-48 HRC) and optimize mechanical properties .

5. Post-Heat Treatment Finishing: Critical surfaces may undergo precision grinding or honing to correct minimal distortion and achieve final ultra-tight tolerances.

6. Surface Finishing: Application of appropriate surface treatments:

   • Electropolishing: For ultra-smooth, bright, and cleanable surfaces (Ra ≤ 0.2 μm) that minimize fluid adhesion and enhance corrosion resistance .

   • Passivation: Chemical treatment per ASTM A967 to enhance the natural chromium oxide layer for maximum corrosion resistance .

7. Deburring & Cleaning: Meticulous deburring of all edges, especially internal lumens and ports, followed by intensive ultrasonic cleaning in controlled environments to meet medical device cleanliness standards .

8. Final Inspection & Documentation: 100% dimensional inspection using CMMs, optical comparators, and vision systems. Hardness verification, surface finish measurement, and functional testing as required. Comprehensive documentation including material certifications and inspection reports .

9. Packaging: Cleanroom packaging (ISO Class 7 or better) suitable for medical applications, with options for sterile or non-sterile delivery .

Product Applications

Product Technical Parameters (Detailed Table)