Designed for stable and efficient drilling in steel materials, this 3xD carbide drill combines imported submicron carbide, self-developed high-performance coating, optimized point geometry, and controlled edge preparation to deliver reliable hole accuracy, smooth chip evacuation, and long tool life in high-speed machining applications.
The drill is manufactured from imported MG grade 0.8 μm submicron tungsten carbide rods with 10% cobalt content, providing the strength and toughness required for high-speed cutting. With optimized point geometry, flute structure, coating performance, and controlled cutting edge treatment, it is suitable for customers who need stable drilling performance, dependable hole quality, and longer tool life in steel applications.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 3xD Carbide Drill for Steel | Drill Type | Solid Carbide Drill |
| Hole Depth | 3xD | Application | Steel hole drilling in CNC machining centers |
| Workpiece Material | Carbon steel,alloy steel, structural steel, pre-hardened steel | Carbide Material | Imported MG Grade 0.8 μm Tungsten Carbide |
| Cobalt Content | 10% | Helix Angle | 30° |
| Point Angle | 138.9° | Rake Angle | 16° |
| Negative Chamfer | -6° | Core Design | 30–40% Variable Core Diameter |
| Back Taper | 0.8° | Coating | Self-Developed High-Performance Coating |
| Coating Hardness | 2000–4000 HV | Friction Coefficient | 0.05–0.15 |
| Coolant Type | Internal Coolant / External Coolant Available | Tool Life | Up to 80–100 Meters Under Suitable Machining Conditions |
| Service | Regrinding and Customization Available |
| Drill Diameter (mm) | Flute Length (mm) | Shank Diameter (mm) | Overall Length (mm) | Hole Depth | Coolant Type | Availability |
|---|---|---|---|---|---|---|
| D3.00-D3.70 | 20 | 4 | 62 | 3xD | Internal / External | Standard |
| D3.80-D4.00 | 24 | 4 | 62 | 3xD | Internal / External | Standard |
| D3.00-D3.70 | 20 | 6 | 62 | 3xD | Internal / External | Standard |
| D3.80-D4.00 | 24 | 6 | 66 | 3xD | Internal / External | Standard |
| D4.80-D6.00 | 28 | 6 | 66 | 3xD | Internal / External | Standard |
| D6.10-D7.00 | 34 | 8 | 79 | 3xD | Internal / External | Standard |
| D7.10-D8.00 | 41 | 8 | 79 | 3xD | Internal / External | Standard |
| D8.10-D10.0 | 47 | 10 | 89 | 3xD | Internal / External | Standard |
| D10.1-D12.0 | 55 | 12 | 102 | 3xD | Internal / External | Standard |
| D12.1-D14.0 | 60 | 14 | 107 | 3xD | Internal / External | Standard |
| D14.1-D16.0 | 65 | 16 | 115 | 3xD | Internal / External | Standard |
| D16.1-D18.0 | 73 | 18 | 123 | 3xD | Internal / External | Standard |
| D18.1-D20.0 | 79 | 20 | 131 | 3xD | Internal / External | Standard |
Key Features
Made from imported 0.8 μm submicron carbide with 10% cobalt for strength and wear resistance.
Ensures stable cutting performance and edge integrity in high-speed steel machining.
Self-developed coating with 2000–4000 HV hardness and low friction improves tool life.
Controlled passivation ensures consistent edges and reduces wear during drilling.
30° helix and 138.9° point angle improve penetration and chip evacuation.
Split-point design reduces drill walking and enhances cutting stability.
16° rake angle with variable core design improves rigidity and chip flow.
Negative chamfer and back taper enhance edge protection and hole quality.
This 3xD carbide drill for steel is designed for short-depth hole machining in CNC machining centers, providing stable drilling accuracy, smooth chip evacuation, and reliable performance for batch production of steel components.
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
3xD means the drill is designed for hole depths up to 3 times the drill diameter.
Yes. This drill is specially developed for steel applications and offers stable drilling, improved wear resistance, reliable chip control, and dependable hole quality.
This drill is suitable for carbon steel, alloy steel, structural steel, mild steel, pre-hardened steel, and bearing steel under suitable machining conditions.
Please provide the workpiece material, drill diameter, hole depth, coolant method, machine type, and required quantity. Drawings or sample photos are also helpful for custom carbide drills.
Yes. Both internal coolant and external coolant versions are available according to machining requirements.
Yes. We support customization based on drawings, workpiece material, hole depth, and drilling application.
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