
CNC Carbide Deep Hole Drills Internal Cooling Feature Machine Tools Specific Drill Bits for Steel. Customizable Dimensions: Drills can be customized up to 50x diameter length with minimum diameter of 0.6mm. Internal Cooling Feature: Engineered for high-precision drilling with effective cooling at the cutting edge. Premium Raw Materials: 100% sourced from original manufacturers like Guhring, Kennametal, and Ceratizit. Advanced Coating Options: Available in ALTiN, AlCr-based, TiSiN, and AlCr-Blue with hardness up to 3700. Non-Standard Production: Custom products available based on customer drawings or samples. Wide Specification Range: Diameters from D3 to D25mm with lengths of 3D, 5D, 8D, and 12D. 15+ Years Experience: Leading manufacturer with over 15 years in solid carbide cutting tools. On-Time Delivery: Guaranteed 100% on-time delivery within 15 workdays for all seasons.