Carbide Drill Bit with Internal Coolant Drills

This Carbide Drill Bit with Internal Coolant is a precision-engineered tool optimized for deep hole drilling operations, solving critical pain points of heat accumulation and chip clogging in extended-depth machining. Constructed from premium sub-micrograin tungsten carbide (WC-Co, 0.8–1.2μm grain size), it boasts exceptional hardness (up to 92 HRA) and fracture toughness—delivering 30% longer tool life than standard carbide drills in high-torque, deep-cut scenarios.

Its defining feature is the integrated internal coolant channels: precision-drilled through the shank and helical flutes, these channels deliver pressurized cutting fluid directly to the cutting edge. This design reduces cutting-zone temperatures by 35–40% (vs. external coolant), prevents chip welding, and enables stable drilling at depth-to-diameter (D:D) ratios up to 30:1. Complemented by a self-centering split point (118° point angle) and optimized helical flutes (30°–35° helix angle), the drill eliminates bit wander during initiation and ensures smooth chip evacuation for both short-chipping (e.g., cast iron) and long-chipping (e.g., aluminum) materials.

Ideal for CNC machining centers and automated production lines, this drill serves industries like aerospace (titanium alloy component drilling), automotive (engine block deep holes), and mold manufacturing (cooling channel machining). It consistently delivers hole accuracy (IT8–IT9 class) and surface finish (Ra ≤ 1.6μm) in high-volume, tight-tolerance applications.