Category Overview

Standard Carbide Drills for General Production Drilling

Landun standard carbide drills are designed for general industrial hole machining in steel, stainless steel, cast iron, aluminum alloys, and other engineering materials. Available in 3xD, 5xD, and 8xD depth series, these solid carbide drills support short holes, medium-depth holes, through holes, blind holes, mounting holes, and threaded-hole preparation. With precision-ground drill geometry, controlled edge preparation, and material-matched coating options, they help improve hole accuracy, chip evacuation, drilling stability, and repeatable production performance.

Standard Carbide Drills

Series Navigator

Select the Right Drill Series by Hole Depth

Choose the depth ratio that matches your application — then find the exact geometry and coating for your workpiece material.

3xD Standard Carbide Drills

3xD Standard Carbide Drills

Designed for holes up to three times the drill diameter. The short cutting length provides higher rigidity, stable entry, and reliable positioning for general production drilling.

  • Up to 3xD
  • Higher Rigidity
  • Stable Entry
  • Coolant Options

Best for: Shallow blind holes · Short through holes · Flat or stable entry surfaces · Applications requiring higher rigidity

View 3xD Standard Carbide Drills
5xD Standard Carbide Drills

5xD Standard Carbide Drills

Designed for holes up to five times the drill diameter. It provides a practical balance between tool rigidity, additional reach, and controlled chip evacuation.

  • Up to 5xD
  • Balanced Reach
  • Blind & Through Holes
  • Coolant Options

Best for: Medium-depth blind holes · Through holes · General component drilling · Applications requiring more reach than 3xD

View 5xD Standard Carbide Drills
8xD Standard Carbide Drills

8xD Standard Carbide Drills

Designed for holes up to eight times the drill diameter. It provides extended reach for longer blind and through holes, with greater demands on coolant delivery and chip evacuation.

  • Up to 8xD
  • Extended Reach
  • Chip Control
  • Internal Coolant

Best for: Extended-depth blind holes · Longer through holes · Internal passages · Applications beyond the 5xD range

View 8xD Standard Carbide Drills

Quick Comparison

3xD vs 5xD vs 8xD — Which Do You Need?

Specification 3xD Series 5xD Series 8xD Series
Hole Depth Short Holes Medium-depth holes Deeper standard holes
Rigidity Highest High Moderate
Chip Evacuation Demand Lower Medium Higher
Typical Hole Type Through holes, shallow blind holes Blind & through holes Deeper blind holes and passages
Coolant Requirement External or model-based coolant External or internal coolant by model Internal coolant recommended
Best Use Stable entry and positioning Balanced production drilling Longer hole depth and chip evacuation

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

Standard carbide drills are used for general industrial hole machining, including through holes, blind holes, mounting holes, threaded-hole preparation, and production drilling in common engineering materials.

3xD drills are used for short holes with higher rigidity. 5xD drills are used for medium-depth holes. 8xD drills are used for deeper standard holes where chip evacuation and coolant support become more important.

They can be selected for steel, stainless steel, cast iron, aluminum, titanium alloy, and other engineering materials according to the drill model and application conditions.

Internal coolant options can be selected according to drill series, diameter, hole depth, and machining conditions. For deeper holes or difficult chip evacuation, internal coolant may be recommended.

Yes. For non-standard diameter, special length, step geometry, flat-bottom holes, or drawing-based requirements, Landun can provide custom carbide drill support.

Send the workpiece material, hole diameter, hole depth, hole type, coolant method, machine information, and production quantity. Landun can help recommend a suitable standard or custom drill solution.

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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