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420j2 17-4ph Stainless Steel CNC Milling Medical Parts

Medical Machining Parts
January 26, 2026
Category Connection: Medical Machining Parts
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Tags:
#Medical Needle #CNC Milling Parts #Cnc Medical Parts
Brief: Step into our short showcase to explore the solution’s standout capabilities. This video provides a detailed walkthrough of the precision CNC milling process for creating complex openwork medical parts from 420J2 and 17-4PH hardened stainless steel. You'll see how intricate internal lattices, thin webs, and deep cavities are machined to micron-level tolerances, making these components ideal for surgical instruments, implants, and diagnostic equipment.
Related Product Features:
  • Utilizes 420J2 and 17-4PH stainless steels for high hardness, wear resistance, and strength in medical applications.
  • Advanced 5-axis CNC milling enables creation of complex openwork structures like lattices, grids, and deep cavities.
  • Achieves micron-level dimensional tolerances of ±0.01 mm and minimum wall thicknesses down to 0.15 mm.
  • Specialized machining with end mills as small as 0.3mm diameter for intricate internal features and high aspect ratios.
  • Post-processing includes electropolishing, micro-deburring, and passivation for smooth, biocompatible finishes.
  • Comprehensive inspection using 3D optical scanning and micro-CT ensures dimensional accuracy of delicate structures.
  • Manufactured under ISO 13485:2016 quality system with full material traceability and regulatory support.
  • Ideal for minimally invasive surgical instruments, orthopedic implants, and diagnostic equipment components.
FAQs:
  • What are the key differences between 420J2 and 17-4PH stainless steel for medical parts?
    420J2 is a martensitic stainless steel supplied annealed and then hardened to 50-55 HRC, ideal for cutting edges requiring high hardness. 17-4PH is a precipitation-hardening stainless steel machined in a soft state then aged to 40-45 HRC, offering superior strength-to-weight ratio and better corrosion resistance for complex shapes.
  • How do you ensure dimensional accuracy for delicate openwork structures?
    We use advanced 5-axis CNC milling with specialized fixturing to prevent vibration, followed by comprehensive inspection using non-contact 3D optical scanning and micro-CT technology. This allows us to verify internal geometry, wall thickness consistency, and achieve tolerances as tight as ±0.005 mm without damaging delicate features.
  • What finishing options are available for these medical components?
    We offer electropolishing for smooth finishes below 0.4 µm Ra that enhance corrosion resistance, micro-blasted satin finishes, and passivation per ASTM A967. All edges are meticulously radiused and deburred to be atraumatic, with cleaning to ISO 13485 medical device standards.
  • What are the typical applications for these openwork medical parts?
    These components are used in minimally invasive surgical instruments like forceps and endoscopic tools, orthopedic and spinal implants with porous structures, dental surgical guides, drug delivery device mechanisms, and diagnostic equipment components requiring precision filter housings or weight-saving designs.
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