Triple-Flute Internal Cooling Carbide Drill Bit

What is Triple-Flute Internal Cooling Carbide Drill Bit?

Triple-flute internal cooling carbide drill bit is a superalloy drill bit with triple helix flutes and internal cooling channels designed for high precision hole location machining. Internal cooling reduces tool temperatures at high speeds and extends tool life while maintaining bore accuracy and surface finish.

Core Technology Advantages

Our Triple-Flute Internal Cooling Carbide Drill Bit is engineered for high precision, rigidity, and stable performance in complex machining tasks, offering significant improvements over traditional two-flute drills.

1. Three-Flute Design + Robust Body – Dual Breakthrough in Rigidity & Precision

Constructed with submicron carbide, drill core thickness reaches 20–25% of drill diameter, bending strength ≥3200 MPa, providing 30% higher rigidity than conventional two-flute drills.

Balanced three-flute design distributes cutting load evenly, reducing vibration by 60%. Centering accuracy ensures straightness deviation <0.02mm/100mm, with superior cylindricity and roundness.

Optimized 140° point angle and honed cross-edges reduce axial cutting force by 30%, allowing direct machining without pilot holes, suitable for 0°–30° inclined surfaces and intersecting holes.

2. High-Pressure Internal Coolant + Efficient Chip Evacuation – No Clogging

Through-coolant channels deliver coolant at 15–30 MPa directly to the cutting edge, improving heat dissipation by 50% and preventing chip adhesion.

The three-groove shallow chip breaker, with a helix angle of 28°–32°, breaks chips into short fragments. Compared to a double-edged drill, the Triple-Flute Internal Cooling Carbide Drill Bit improves chip removal speed by 40%.

Deep-to-diameter ratio (L/D) supports up to 8D, enabling deep-hole machining without clogging risks.

3. Multi-Coating + Material Adaptability – Longer Life & Higher Efficiency

Available coatings include TiAlN, TiCN, and Altin-based multi-layer PVD, with hardness HV2200+ and oxidation resistance up to 1150°C.

Tool body material can be customized for cast iron, steel, high-temperature alloys, etc., extending single-flute life by 30% and increasing feed rates by 20%, improving overall productivity by 30%.

4. Precision Manufacturing + Broad Compatibility – Ideal for Batch Production

Cutting edge runout ≤0.01mm, diameter tolerance ±0.03mm, surface roughness Ra1.6–3.2μm.

Compatible with machining centers, dedicated production lines, straight shank, Morse taper, BT/HSK interfaces. Supports through-holes, blind holes, and reaming operations; non-standard sizes available on request.

Core Product Parameters

Recommended Cutting Parameters

Notes

For L/D >8D, adopt “layered cutting + chip gap strategy”.

Use large rake angle for sticky materials.

Keep coolant clean to prevent internal channel blockage.

Typical Applications

Automotive Manufacturing Using a Triple-Flute Internal Cooling Carbide Drill Bit, φ10 mm 5D intersecting holes are machined at a cutting speed of 80 m/min with a feed rate of 0.15 mm/rev. Single-tool life exceeds 3,500 holes, with hole deviation controlled within <0.02 mm, fully meeting precision assembly requirements.

Energy Equipment 42CrMoV wind power slewing bearing deep holes (φ39mm, depth 280mm), high-pressure coolant system, cutting speed 135 m/min, feed 0.3 mm/rev, continuous chip evacuation, surface finish Ra1.6μm.

Mold Manufacturing SKD11 mold steel 8D deep holes, three-flute rigid design + efficient chip evacuation prevents vibration and scratches, hole tolerance ±0.03mm, no secondary polishing required.

Aerospace Titanium alloy parts inclined holes, high-pressure coolant reduces cutting temperature, three-flute centering design avoids hole deviation, machining efficiency increased 40% over conventional two-flute drills, meeting aerospace-grade precision standards.