Product Benefits
High Hardness and Superior Wear Resistance
Fabricated from fine-grained (0.2–0.8 μm) cemented carbide, the material achieves a hardness of HRA 92–94. Its wear resistance is 5 to 10 times greater than that of high-speed steel drills, making it ideal for prolonged, continuous machining operations.
Excellent Centering and Hole Quality
The unique self-centering drill tip design (featuring geometries such as X-type or S-type cross-point grinding) eliminates the need for pre-drilling pilot holes. This ensures high positional accuracy, excellent roundness, and hole diameter tolerances within the IT8–IT9 grade range.
High-Efficiency Cutting Capability
Recommended cutting speeds are 2 to 4 times faster than those of high-speed steel drills, accompanied by higher feed rates. This significantly boosts the machining efficiency per hole, making the tool particularly well-suited for automated mass production environments.
Superior Chip Evacuation and Cooling
Dual-helix internal cooling channels extend directly to the cutting edges, utilizing high-pressure coolant to forcibly evacuate chips and prevent clogging. The optimized helical flute design ensures reliable chip breaking, making it ideal for deep-hole drilling applications (with length-to-diameter ratios ranging from 10:1 to 30:1).
Extensive Coating Options
PVD coatings-such as TiAlN, AlCrN, and TiSiN-significantly enhance hot hardness and oxidation resistance, extending tool life by 2 to 5 times when machining stainless steel and titanium alloys. The specialized DLC coating is designed specifically for aluminum alloys, effectively preventing built-up edge formation.
Regrindability
Unlike indexable insert drills, solid carbide drills can be repeatedly reground using specialized tool grinding machines once worn, thereby further reducing the cost per piece.
Application Fields
Automotive Components
Oil passages in engine blocks, injector bores, crankshaft bolt holes, and thread pilot holes in brake calipers-applications requiring high consistency and high efficiency in mass production.
Aerospace
High-precision holes in difficult-to-machine materials such as titanium alloys (e.g., Ti6Al4V) and Inconel 718-including components like landing gear and cooling holes in turbine disks-which necessitate stable and wear-resistant carbide drill bits.
Mold & Die Industry
Ejector pin holes, cooling water channels, and mold plate screw holes-applications that frequently require deep holes (with a length-to-diameter ratio of ≥10) and exceptional hole diameter precision.
Medical Devices
Micro-holes (diameters ranging from φ0.5 mm to φ3 mm) in bone plates, bone screws, and surgical instruments require solid carbide micro-drills to ensure a sharp, burr-free finish.
General Machinery & Hydraulics
Precision holes in valve bodies, hydraulic manifold blocks, and connecting rods; applicable materials include cast iron, carbon steel, and alloy steel.
Electronics
Thread starter holes and positioning holes in aluminum alloy housings and heat sinks; these applications typically utilize uncoated or DLC-coated micro-drills.
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