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420j2 Steel Medical Parts Precision CNC Milling

stainless steel needle tube
January 25, 2026
Category Connection: Stainless Steel Needle Tube
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#Stainless Steel Tube #Stainless Steel Needle Tube #Stainless Steel Shaft
Brief: Get an inside view of features that deliver consistent results in daily use. This video provides a detailed walkthrough of the micro-precision CNC milling process for 420J2 stainless steel medical spare parts. You'll see how advanced multi-axis machining achieves micron-level tolerances, complex geometries, and superior surface finishes critical for surgical instruments and medical devices.
Related Product Features:
  • Manufactured from 420J2 stainless steel, a martensitic grade known for excellent hardness and wear resistance after heat treatment.
  • Produced using advanced 5-axis micro-milling and CNC Swiss machining for exceptional dimensional accuracy and complex geometries.
  • Achieves high precision tolerances of ±0.005 mm standard and ±0.002 mm on critical features for reliable performance.
  • Undergoes precise vacuum hardening and tempering to achieve target hardness of 50-55 HRC while maintaining necessary toughness.
  • Features superior surface finishes including electropolished options with Ra < 0.2 µm for enhanced corrosion resistance and cleanability.
  • Capable of producing miniature components with features as small as 0.05 mm, including micro-holes, thin walls, and fine pitch threads.
  • Ideal for minimally invasive surgical instruments, orthopedic tools, disposable blades, and medical device mechanisms.
  • Manufactured under ISO 13485:2016 compliant quality system with full material certification and 100% inspection.
FAQs:
  • What makes 420J2 stainless steel suitable for medical spare parts?
    420J2 stainless steel is a martensitic grade that offers excellent hardness, wear resistance, and the ability to hold a keen edge after heat treatment. It provides good corrosion resistance for medical applications and can achieve high hardness levels of 50-55 HRC, making it ideal for surgical instruments and medical device components.
  • What level of precision can be achieved with your micro-CNC milling process?
    Our micro-precision CNC milling process achieves standard dimensional tolerances of ±0.005 mm (±0.0002") and can reach high-precision tolerances of ±0.002 mm (±0.00008") on critical features. We can produce minimum feature sizes of 0.05 mm, including micro-holes, thin walls, and fine pitch threads with exceptional accuracy.
  • How do you ensure the quality and cleanliness of medical components?
    We implement comprehensive quality control including 100% inspection using high-magnification vision systems, optical CMMs, and surface profilometers. All parts undergo intensive ultrasonic cleaning in an ISO Class 7 cleanroom environment and are manufactured under an ISO 13485:2016 compliant quality management system with full material certification and device history records.
  • What types of medical applications are these precision parts used for?
    These micro-precision components are designed for critical medical applications including minimally invasive surgical instruments (laparoscopic tools, endoscopic cutters), orthopedic and dental surgical tools, disposable surgical blades, medical device mechanisms (drug delivery pumps, auto-injectors), and veterinary surgical instruments where reliability and precision are essential.
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