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304 316L Steel Micro Drill Bits

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: Ever wondered how to achieve exceptional precision when drilling micro-holes in tough stainless steels? This video provides a detailed walkthrough of our 304 316L Stainless Steel Hard CNC Milling Fine Micro Drill Bits. You'll see how these high-precision tools are manufactured using advanced 5-axis CNC grinding technology and specialized coatings to deliver superior hole quality and extended tool life in demanding micro-machining applications.
Related Product Features:
  • Manufactured from ultra-fine grain tungsten carbide substrate for extreme hardness and high wear resistance.
  • Precision-ground using advanced 5-axis CNC grinding technology for exceptional geometry accuracy and concentricity.
  • Features specialized PVD coatings like TiAlN or AlTiN for superior heat and wear resistance during operation.
  • Optimized 135° point angle specifically designed for stainless steel to reduce walking and increase edge strength.
  • High helix angle flute geometry (30°-40°) ensures efficient chip evacuation in deep holes and gummy materials.
  • Available in diameter ranges from 0.05mm to 1.00mm with overall lengths from 3xD to 10xD of diameter.
  • Capable of drilling up to 5x diameter depth in austenitic stainless steels like 304 and 316L.
  • Undergoes 100% inspection under high-power microscopes and laser micrometer verification for quality assurance.
FAQs:
  • What materials are these micro drill bits designed to machine?
    These micro drill bits are specifically engineered for austenitic stainless steels like 304, 304L, 316, and 316L, as well as PH stainless (17-4PH), titanium, and Inconel. Their solid carbide construction and specialized coatings make them ideal for tough, work-hardening materials.
  • What is the diameter range available for these precision micro drill bits?
    The micro drill bits are available in a precise diameter range from 0.05 mm to 1.00 mm, covering common sizes like 0.10mm, 0.20mm, 0.30mm, 0.50mm, and 0.80mm to suit various micro-machining requirements.
  • How are these micro drill bits manufactured to ensure high precision?
    They are manufactured through a meticulous process starting with ultra-fine grain tungsten carbide blanks that undergo precision 5-axis CNC grinding with diamond wheels. This integrated process forms all critical features including flute geometry, point geometry, and shank in a single setup, followed by specialized PVD coating application and 100% inspection under high-power microscopes.
  • What applications are these micro drill bits commonly used for?
    These drill bits are essential for precision medical device manufacturing, electronics and semiconductor production, watchmaking, aerospace components, and mold and die making. They excel at drilling micro-holes in surgical instruments, fuel injector nozzles, watch components, and conformal cooling channels in molds.
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