Designed for demanding extra-deep-hole drilling in steel materials, this 20xD carbide drill combines imported MG grade 0.8 μm carbide, ALTISIXN wear-resistant coating, optimized point geometry, reinforced extra-deep-hole flute structure, and internal coolant channels to improve long-distance chip evacuation, hole straightness, edge protection, and process stability in precision steel machining.
The 20xD carbide drill for steel is designed for demanding extra-deep-hole applications where long-distance chip evacuation, hole straightness, coolant delivery, tool rigidity, and process stability are critical. Compared with 12xD or 15xD drilling, 20xD machining places significantly higher demands on pilot hole accuracy, spindle runout, coolant pressure, flute rigidity, tool holding, and machine condition.
Steel materials such as carbon steel, alloy steel, structural steel, pre-hardened steel, and bearing steel may generate continuous chips and considerable cutting heat during deep-hole drilling. In a 20xD hole, chips must travel a very long distance before leaving the cutting zone. Poor chip evacuation can lead to chip packing, increased torque, cutting edge overload, hole deviation, surface damage, or premature drill breakage.
This 20xD carbide drill is manufactured from imported MG grade 0.8 μm tungsten carbide rods with 10% cobalt content, supporting tool rigidity and edge stability. Combined with ALTISIXN coating, reinforced flute geometry, controlled edge preparation, internal coolant channels, Walter inspection, and German Walter 5-axis grinding, it helps improve drilling reliability and maintain consistent hole quality in extra-deep steel applications.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 20xD Carbide Drill for Steel | Drill Type | Solid Carbide Extra-Deep-Hole Drill |
| Hole Depth | 20xD | Application | Extra-deep-hole drilling in steel materials |
| Workpiece Material | Carbon steel, alloy steel, structural steel, pre-hardened steel, bearing steel | Carbide Material | Imported MG Grade 0.8 μm Tungsten Carbide |
| Cobalt Content | 10% | Coating | ALTISIXN Wear-Resistant Coating |
| 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 strength, and dimensional stability required for extra-deep steel hole drilling.
ALTISIXN coating helps protect the cutting edge against wear and heat during steel machining.
It supports more stable cutting performance and helps reduce premature edge wear throughout the long drilling cycle.
Internal coolant delivers cutting fluid closer to the drill point to help control heat and carry chips out of the hole.
Stable coolant pressure and flow are especially important for preventing chip packing in 20xD drilling.
German Walter 5-axis grinding machines are used to produce accurate cutting edges and consistent flute geometry.
Walter Helicheck Plus measurement and 300x edge inspection help verify profile accuracy and cutting edge quality before shipment.
This 20xD carbide drill for steel is suitable for extra-deep-hole machining in CNC machining centers and automated production equipment. It is intended for applications where long-distance chip evacuation, internal coolant delivery, hole straightness, dimensional consistency, 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 is intended for a drilling depth of approximately 100 mm.
Yes. This 20xD carbide drill is designed for carbon steel, alloy steel, structural steel, pre-hardened steel, bearing steel, and related steel materials under suitable machining conditions.
The drill uses ALTISIXN wear-resistant coating to improve edge protection, heat resistance, and cutting stability during extra-deep steel drilling.
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.
Internal coolant is required for most 20xD drilling applications. It helps carry chips through the long flutes, control cutting heat, reduce chip packing, and protect the cutting edge.
A precision pilot or guide hole is typically required for 20xD drilling. It guides the long drill during entry and helps improve hole position, straightness, and process safety.
Yes, but the effective drilling depth must allow space for the drill point and chip evacuation. Blind-hole requirements should be confirmed before selecting the drill length.
Yes. We support custom diameter, flute length, overall length, shank size, coolant channel, ALTISIXN coating, and pilot drill matching according to drawings and application requirements.
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