Category Overview

Precision Micro Carbide Drills for Small-Diameter Holes

Landun micro carbide drills are designed for small-diameter holes where spindle runout, drill-point consistency, chip congestion, and cutting-edge strength directly affect drilling performance. Available in 3xD and 5xD depth series, they support short and medium-depth micro holes in steel, stainless steel, cast iron, aluminum alloys, titanium alloys, and other engineering materials.

Precision-ground drill geometry, controlled edge preparation, and material-specific coating options help improve hole positioning, reduce burr formation and edge chipping, and maintain consistent hole quality during batch production.

Micro Carbide Drills

Series Navigator

Select the Right Micro Drill Series by Hole Depth

Choose between 3xD and 5xD micro carbide drills according to the required hole depth, rigidity, entry stability, and chip evacuation conditions.

3xD Micro Carbide Drills
View 3xD Micro Carbide Drills
5xD Micro Carbide Drills
View 5xD Micro Carbide Drills

Quick Comparison

3xD vs 5xD Micro Carbide Drills — Which Do You Need?

Selection Factor 3xD Micro Drills 5xD Micro Drills
Hole Depth Short micro holes Medium-depth micro holes
Rigidity Highest High
Entry Stability Excellent Very good
Deflection Risk Lower Higher than 3xD
Chip Evacuation Demand Lower Higher
Typical Hole Type Shallow blind and short through holes Medium-depth blind and through holes
Best Use Maximum stability and positioning accuracy Additional reach with controlled chip evacuation
Selection Principle Choose when 3xD can reach the full hole depth Choose when the required depth exceeds the 3xD range

Choose by Workpiece Material

Different workpiece materials require different drill geometry, coating direction, edge preparation, and coolant strategy. Select the suitable standard carbide drill series according to material behavior, hole depth, chip formation, and production conditions.
For Steel

For Steel

Challenges: Tool wear and unstable chip evacuation.

Recommended: Wear-resistant coating and stable flute geometry.

For Stainless Steel

For Stainless Steel

Challenges: Work hardening, cutting heat, and chip adhesion.

Recommended: Sharp edges, suitable coating, and effective coolant delivery.

For Aluminum Alloy

For Aluminum Alloy

Challenges: Long chips, material adhesion, and burr formation.

Recommended: Sharp geometry, polished flutes, and DLC or uncoated options.

For Cast Iron

For Cast Iron

Challenges: Abrasive wear, powdery chips, and edge chipping.

Recommended: Strong edge geometry and wear-resistant coating.

For Titanium Alloys

For Titanium Alloys

Challenges: Heat concentration, adhesion, and high cutting load.

Recommended: Heat-resistant coating, reinforced edges, and internal coolant support.

Typical Applications

Automotive Carbide Drilling Solutions

Automotive Carbide Drilling Solutions

Mold & Die Carbide Drilling Solutions

Mold & Die Carbide Drilling Solutions

Aerospace Carbide Drilling Solutions

Aerospace Carbide Drilling Solutions

Medical Component Drilling Solutions

Medical Component Drilling Solutions

Hydraulic & Valve Drilling Solutions

Hydraulic & Valve Drilling Solutions

Electronics & Precision Components Drilling Solutions

Electronics & Precision Components Drilling Solutions

Why Choose Us

Why Choose Landun CNC Tool

Landun CNC Tool is a carbide drill manufacturer focused on precision solid carbide drills and custom carbide drill solutions, supported by advanced grinding, strict inspection, and consistent edge preparation.

3,000 m²

Production Facility

3 μm

Geometry Accuracy Control

300x

Edge Inspection Magnification

±0.003 mm

Edge Passivation Control

Why Choose Us
German Walter 5-Axis Grinding Machines

German Walter 5-Axis Grinding Machines

Our carbide drills are ground on German WALTER 5-axis grinding machines for sharp cutting edges, stable accuracy, and smooth drilling performance.

Walter Helicheck Plus Contour Inspection

Walter Helicheck Plus Contour Inspection

We use WALTER HELICHECK PLUS for contour inspection, keeping profile and radius control within 3 μm for reliable geometric precision.

300x Magnification Edge Inspection

300x Magnification Edge Inspection

Each carbide drill is inspected at 300x magnification to check edge quality and avoid chipping or saw-tooth defects before shipment.

Consistent Edge Passivation Control

Consistent Edge Passivation Control

Manual drill point honing and automatic rubber-bonded diamond abrasive polishing help improve tool life and control edge consistency within ±0.003 mm.

Common Questions

Frequently Asked Questions

Micro carbide drills are used to machine small-diameter precision holes in compact components, instruments, molds, automotive parts, electronic components, medical parts, and fluid-control components.

A 3xD micro drill has a shorter cutting length and provides greater rigidity and entry stability. A 5xD micro drill provides additional reach for medium-depth holes but requires more attention to chip evacuation, runout, and drilling conditions.

Choose the shortest drill series that can fully reach the required hole depth. A shorter drill generally provides better rigidity and lower deflection risk.

Because the drill diameter is small, even limited spindle, holder, or tool runout can create uneven cutting-edge load, oversized holes, premature wear, or drill breakage.

A spot drill may help improve positioning on angled, curved, rough, or unstable entry surfaces. On a flat and stable surface, direct drilling may be possible depending on the drill geometry and machine conditions.

Material-specific micro drill options are available for steel, stainless steel, aluminum alloys, cast iron, titanium alloys, and other engineering materials.

 

Yes. Custom support can be provided according to the required drill diameter, cutting length, overall length, shank size, workpiece material, hole type, and application conditions.

Landun Cnc Tool

Tell Us Your Requirements

Contact Landun CNC Tool for standard, micro, deep-hole, internal-coolant, flat-bottom, step, and custom solid carbide drills. Send us your drawing, existing tool sample, workpiece material, and hole requirements, and our team will provide an application review and quotation.

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