Wholesale Carbide Micro Drill Bit for Cast Iron & Non-Ferrous

This solid carbide micro drill is engineered for ultra-precision small-hole drilling in demanding CNC applications. Manufactured from ultra-fine micro-grain tungsten carbide and finished with advanced nano-grade PVD coating, it delivers exceptional rigidity, superior wear resistance, and extended tool life — even at hole diameters below 1.0mm. Designed for high-speed spindles and tight-tolerance work, this micro drill maintains dimensional accuracy and excellent hole quality in materials ranging from aluminum and mild steel to hardened alloys and exotic metals.

Tungsten Carbide Micro Drill Bit Features

Sub-Micro Grain Carbide Substrate 

– Ultra-fine grain structure for maximum hardness (HRA 92+) and edge strength at miniature diameters

TiSiN / TiAlN / DLC / Uncoated Nano Coating

– Outstanding heat resistance and lubricity; reduces built-up edge and extends tool life

Precision Point Geometry 

– Optimized 118° / 130° / 140° point angle for accurate hole location and minimized walking

High Rigidity Design

– Reinforced core diameter prevents deflection and breakage in deep-hole drilling

Tight Diameter Tolerance

– h6 / h7 tolerance ensures consistent hole sizing and repeatability

Polished Flute Surface 

– Smooth chip evacuation, reduced cutting resistance, and superior surface finish on hole walls

Right Hand Cut / Right Hand Spiral 

– Standard geometry for downward chip removal

Tungsten Carbide Drill Bit Applications

 Tiny Holes, Tight Tolerances 

– Whether you're drilling a Ø0.3mm cooling channel in a mold core or a precision locating hole in a medical implant, our micro drills hold the line on accuracy and repeatability. 

Hard Materials, No Sweat 

– Hardened steel up to HRC65, stainless 316, titanium — materials that would chew up HSS drills are no match for our carbide substrate and heat-resistant coatings. 

High-Volume Production 

– Engineered for consistent performance across thousands of holes. Less tool wear = fewer changeovers = higher throughput. 

Delicate Parts 

– Thin-walled components, fragile assemblies, and parts where any drill wander means scrap. The rigid carbide body and optimized point geometry keep the hole exactly where you placed it. 

Deep Hole Drilling – Reinforced core and polished flutes allow aspect ratios up to 10×D (with peck cycle), making them ideal for deep, small-diameter holes.