20xD Deep Hole Carbide Drills for Demanding Deep Holes

20xD Deep Hole Carbide Drills

Internal-coolant solid carbide drills designed for long and demanding holes in steel, stainless steel, cast iron, aluminum, and titanium alloys. Pilot-guided entry, optimized flute geometry, and controlled coolant delivery help maintain chip evacuation, hole straightness, and drilling stability at depths of up to approximately twenty times the drill diameter.

Long-Hole Drilling up to 20xD

Through-Tool Internal Coolant

Pilot-Guided Drilling Process

Controlled Chip Evacuation

20xD Deep Hole Carbide Drills for Long-Hole Production

The 20xD deep hole carbide drill series is designed for long holes beyond the practical range of 12xD and 15xD drills. Its extended flute supports depths of up to twenty times the drill diameter, while through-tool coolant channels help reduce heat and evacuate chips. Because 20xD drilling is highly sensitive to runout, pilot-hole accuracy, chip congestion, coolant stability, and machine rigidity, a controlled drilling process is essential. Material-specific geometries, coatings, flute designs, and custom dimensions are available for demanding deep-hole applications in stable batch production.

20xD Deep Hole Carbide Drills Application Range & Hole Features

Long Through Holes

Suitable for long through holes in housings, blocks, shafts, plates, and precision mechanical components.

Extended Blind Holes

Designed for deep blind holes requiring controlled depth, reliable chip evacuation, and stable drill guidance.

Hydraulic Manifold Passages

Used for long fluid channels in hydraulic blocks, valve bodies, manifolds, and pressure-control components.

Crankshaft and Engine Holes

Suitable for oil passages and other deep-hole features in crankshafts, engine blocks, cylinder heads, and transmission components.

Mold Cooling Channels

Suitable for cooling passages in mold plates, dies, inserts, and tooling components.

Aerospace Structural Parts

Used for long holes where position, straightness, process stability, and controlled exit conditions are important.

How to confirm whether 20xD is suitable

Selection Factor	Recommended for 20xD
Hole Depth	Long holes up to approximately 20× the drill diameter
Hole Type	Through holes, deep blind holes, oil passages, cooling channels, manifold passages, and intersecting holes
Main Advantage	Extended drilling reach with through-tool coolant and guided entry
Chip Evacuation Demand	Requires controlled chip formation, sufficient flute space, and stable coolant supply
Hole Straightness	Influenced by pilot accuracy, spindle runout, drill geometry, coolant, and machine rigidity
Typical Requirement	Long-hole machining with stable chip evacuation and controlled hole deviation

Selection Factor

Recommended for 20xD

Hole Depth

Long holes up to approximately 20× the drill diameter

Hole Type

Through holes, deep blind holes, oil passages, cooling channels, manifold passages, and intersecting holes

Main Advantage

Extended drilling reach with through-tool coolant and guided entry

Chip Evacuation Demand

Requires controlled chip formation, sufficient flute space, and stable coolant supply

Hole Straightness

Influenced by pilot accuracy, spindle runout, drill geometry, coolant, and machine rigidity

Typical Requirement

Long-hole machining with stable chip evacuation and controlled hole deviation

20xD Deep Hole Carbide Drills Related Products

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5xD Carbide Drill for Aluminum

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3xD Micro Carbide Drill for Steel

Designed for precision micro-hole drilling in steel materials. MG 0.8 μm carbide, ALTISIXN coating, ±0.003 mm edge passi...

5xD Micro Carbide Drills for Cast Iron

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Frequently Asked Questions

What are 20xD deep hole carbide drills used for?

They are used for long through holes, deep blind holes, oil passages, cooling channels, hydraulic manifold passages, crankshaft holes, and other demanding deep-hole applications.

What is the difference between 15xD and 20xD drills?

A 15xD drill is shorter and normally provides greater rigidity. A 20xD drill provides additional reach but requires stricter control of pilot-hole accuracy, runout, coolant delivery, chip evacuation, and machine movement.

Does a 20xD drill require internal coolant?

Through-tool internal coolant is strongly recommended for stable 20xD drilling because it helps cool the cutting edge and evacuate chips through the long flute.

What materials can 20xD carbide drills machine?

Material-specific options can be selected for steel, stainless steel, cast iron, aluminum alloys, titanium alloys, and other engineering materials.

Can Landun manufacture custom 20xD deep hole drills?

Yes. Landun can review non-standard diameters, flute lengths, shank dimensions, coolant-hole designs, point geometries, coatings, step structures, drawings, samples, and replacement-tool projects.

What information should I provide for drill selection?

Please provide:

Workpiece material and hardness
Required hole diameter
Required hole depth
Through-hole or blind-hole design
Hole tolerance and straightness requirements
Entry and exit surface conditions
Cross holes or interrupted sections
Pilot-hole requirements
Machine and spindle information
Tool-holder information
Expected spindle runout
Coolant pressure, flow, and filtration
Workpiece clamping method
Expected production quantity
Current chip-removal, deviation, wear, or breakage problems

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.

Email info@landuntool.com

WhatsApp 8618068789495

Phone +86 18068789495

Address Building 2, No. 35 Taihangshan Road, Xixiashu Town, Xinbei District, Changzhou, China

Deep Hole Carbide Drills Series

20xD Deep Hole Carbide Drills

20XD

Solid Carbide

Through-Tool

Pilot-Guided

Category Overview

20xD Deep Hole Carbide Drills for Long-Hole Production

20xD Deep Hole Carbide Drills Application Range & Hole Features

Long Through Holes

Extended Blind Holes

Hydraulic Manifold Passages

Crankshaft and Engine Holes

Mold Cooling Channels

Aerospace Structural Parts

How to confirm whether 20xD is suitable

20xD Deep Hole Carbide Drills Related Products

Why Choose Us

Why Choose Landun CNC Tool

3,000 m²

3 μm

300x

±0.003 mm

German Walter 5-Axis Grinding Machines

Walter Helicheck Plus Contour Inspection

300x Magnification Edge Inspection

Consistent Edge Passivation Control

Frequently Asked Questions

What are 20xD deep hole carbide drills used for?

What is the difference between 15xD and 20xD drills?

Does a 20xD drill require internal coolant?

What materials can 20xD carbide drills machine?

Can Landun manufacture custom 20xD deep hole drills?

What information should I provide for drill selection?

Landun Cnc Tool

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