
CNC Drilling Tools Tungsten Carbide Internal Cold Drill Bits. High Precision Machining: Processing precision reaches 0.005 for accurate metal drilling operations. Durable Tungsten Carbide: Made from high-quality tungsten steel with hardness up to 42 GPa. Multiple Coating Options: Available with AlTiN, TiAlN, TiSiN, and Naco coatings for various applications. Customized Sizes Available: Size ranges from 1-20mm with customized length options up to 200mm. Internal Cooling Design: Features internal cold drill bit structure for efficient cooling during drilling. Fast Sample Delivery: Samples dispatched within 2-7 workdays for urgent requirements. OEM/ODM Services: Full customization available from samples or designs with OEM/ODM support. Strict Quality Control: Every cutter inspected by Zoller Measuring and Inspecting Machine.