Designed for demanding extra-deep-hole drilling in aluminum and non-ferrous materials, this 20xD carbide drill combines imported MG grade 0.8 μm carbide, sharp cutting edge preparation, uncoated or DLC coating options, optimized point geometry, reinforced extra-deep-hole flute structure, and internal coolant channels to reduce chip adhesion, improve long-distance chip evacuation, and maintain reliable hole straightness and clean hole wall quality.
The 20xD carbide drill for aluminum is designed for demanding extra-deep-hole applications where long-chip evacuation, low cutting resistance, hole straightness, coolant delivery, and process stability are critical. Compared with 12xD or 15xD drilling, 20xD aluminum machining places significantly higher demands on pilot hole accuracy, flute smoothness, spindle runout, coolant pressure, tool holding, and machine rigidity.
Aluminum and aluminum alloys are relatively soft but highly adhesive during drilling. Long aluminum chips can stick to the cutting edge, accumulate inside the flute, and form built-up edge. In a 20xD hole, these chips must travel a very long distance before leaving the cutting zone.
Insufficient coolant delivery or unstable chip evacuation may cause chip packing, increased cutting torque, hole wall scratches, diameter variation, hole deviation, or premature drill breakage. A sharp cutting edge, smooth flute surface, and low-friction coating option are therefore especially important for extra-deep aluminum drilling.
This 20xD carbide drill is manufactured from imported MG grade 0.8 μm tungsten carbide rods with 10% cobalt content, supporting tool rigidity and cutting edge stability. Uncoated options provide sharp cutting performance and low cutting resistance, while DLC-coated options help reduce friction, aluminum adhesion, and built-up edge during long drilling cycles.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 20xD Carbide Drill for Aluminum | Drill Type | Solid Carbide Extra-Deep-Hole Drill |
| Hole Depth | 20xD | Application | Extra-deep-hole drilling in aluminum and non-ferrous materials |
| Workpiece Material | Aluminum, aluminum alloys, 6061, 7075, cast aluminum, non-ferrous metals | Carbide Material | Imported MG Grade 0.8 μm Tungsten Carbide |
| Cobalt Content | 10% | Coating | Uncoated / DLC Coating Available |
| Passivation Control | ±0.003 mm | Edge Inspection |
|
| Service | Regrinding and Customization Available | Tool Life | Up to 80–150 Meters Under Suitable Machining Conditions |
Key Features
Made from imported MG grade 0.8 μm tungsten carbide with 10% cobalt content.
The fine carbide grain structure helps provide the rigidity, edge sharpness, and dimensional stability required for extra-deep aluminum hole drilling.
Uncoated drills provide sharp cutting performance and low cutting resistance for general aluminum machining.
DLC coating provides a low-friction surface that helps reduce aluminum adhesion, built-up edge, chip sticking, and hole wall scratches during long drilling cycles.
Internal coolant channels deliver cutting fluid close to the drill point and help carry long aluminum chips through the flutes.
Stable coolant pressure and flow are especially important for reducing chip packing, built-up edge, and unstable cutting torque in 20xD drilling.
Reinforced flute geometry balances chip space and tool rigidity for extra-deep-hole aluminum machining.
The variable core design and back taper help reduce internal friction, improve long-chip flow, protect the cutting edge, and support better hole straightness and surface quality.
This 20xD carbide drill for aluminum is suitable for extra-deep-hole machining in CNC machining centers and automated production equipment. It is intended for aluminum applications where long-chip evacuation, anti-adhesion performance, internal coolant delivery, clean hole walls, hole straightness, and reliable batch performance are important.
Send us your material and hole requirements. Our team will recommend the right drill solution.
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.
Production Facility
Geometry Accuracy Control
Edge Inspection Magnification
Edge Passivation Control
Our carbide drills are ground on German WALTER 5-axis grinding machines for sharp cutting edges, stable accuracy, and smooth drilling performance.
We use WALTER HELICHECK PLUS for contour inspection, keeping profile and radius control within 3 μm for reliable geometric precision.
Each carbide drill is inspected at 300x magnification to check edge quality and avoid chipping or saw-tooth defects before shipment.
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
20xD means the drill is designed to produce holes up to 20 times its diameter. For example, a 5 mm drill can be used for a hole depth of approximately 100 mm under suitable machining conditions.
Yes. This 20xD carbide drill is designed for 6061, 7075, 2024, 6082, cast aluminum, and other aluminum alloys under suitable machining conditions.
Uncoated drills are suitable for applications requiring a very sharp cutting edge and low cutting resistance. DLC-coated drills are recommended when lower friction, stronger anti-adhesion performance, reduced built-up edge, and cleaner hole walls are required.
Aluminum produces long and adhesive chips. In 20xD drilling, these chips must travel a long distance through the flutes, increasing the risk of chip packing, built-up edge, cutting torque fluctuation, and hole wall damage.
A 20xD drill has a longer unsupported body and a longer chip evacuation path than a 15xD drill. It requires more accurate pilot guidance, stronger coolant delivery, lower spindle runout, and more stable machine conditions.
A precision pilot or guide hole is typically required for 20xD drilling. It guides the long drill during entry and helps improve hole positioning, straightness, and process safety.
Internal coolant is required for most 20xD aluminum applications. It helps carry long chips through the flutes, reduce chip adhesion, lower cutting temperature, and maintain stable hole quality.
Yes. We support customized diameter, flute length, overall length, shank size, coolant channel, uncoated or DLC surface options, and matching pilot drills according to drawings and machining requirements.
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