Our 3-Flute Carbide Step Drill Bit revolutionizes multi-diameter hole machining with its advanced tungsten carbide construction, precision AlTiN coating, and innovative through-coolant technology. Engineered for high-speed CNC applications, this step drill combines drilling, chamfering, and countersinking in a single operation, delivering unmatched efficiency when working with hardened steels, titanium alloys, and nickel-based superalloys.

• Premium Tungsten Carbide Substrate - Ultra-fine grain structure (0.5μm) ensures extreme hardness (93.5 HRA) and wear resistance for machining materials up to HRC 60.
• 3-Flute Optimized Geometry - Provides 50% faster chip evacuation than 4-flute designs while maintaining stability in deep-hole drilling.
• AlTiN Nano-Coating Technology - Aluminum Titanium Nitride coating offers:
  • 3,800 HV hardness (3x harder than uncoated carbide)
  • 900 °C oxidation resistance for dry machining capability
  • Low friction coefficient reducing built-up edge (BUE)
• Through-Coolant Holes (2-4 Channels) - Precision coolant delivery to cutting edges:
  • Reduces cutting temperature by 40% vs. standard drills
  • Extends tool life by 2-3x in titanium and Inconel
• Multi-Diameter Step Design - Single tool replaces 3-5 conventional drills with:
  • Customizable step increments (0.5mm/1.0mm)
  • Included angles: 90°, 120° (standard), or custom
• High-Speed Ready - Balanced for 8,000-12,000 RPM operations with G2.5 dynamic balance certification.

• Time Savings - Combines drilling + chamfering in one pass, reducing cycle times by 30%
• Cost Efficiency - 1 tool replaces multiple drill bits + countersinks
• Surface Finish - Achieves Ra 0.8 μm in stainless steel (vs. 1.6μm with HSS)
• Reliability - Manufactured to ISO 9001 standards with 100% preshipment inspection

• Drilling fastener holes in titanium bulkheads (Ti-6Al-4V)
• Composite/metal stacks with 0.02mm diameter consistency

• Valve body machining in Inconel 718 and 17-4PH stainless

• Precision holes in cobalt-chrome orthopedic implants

• High-volume drilling of hardened transmission gears (up to HRC 58)

• Advanced grinding machines: All of our grinding machines are WALTER and SAACKE brands.
• Advanced inspection machines: We have ZOLLER, OMEGA, PG1000, etc. For inspecting each carbide tools.
• Fast feedback: we offer 24 hours online service
• Strict quality control system: We strictly adhere to a three-stage inspection process for each tool:
  • Raw material inspection
  • Semi-finished product inspection after production
  • Final inspection after coating (pre-shipment check)