A rigid 3xD solid carbide drill developed for short-hole drilling in hardened steel and hardened mold steel. Reinforced cutting edges, heat-resistant coating, and stable point geometry help reduce edge chipping and maintain consistent hole accuracy.
The 3xD carbide drill for hardened steel is developed for short-hole drilling applications where high material hardness, concentrated cutting heat, edge chipping, and rapid tool wear can affect drilling stability and hole consistency. Compared with general steel drilling, hardened steel machining requires higher tool rigidity, stronger cutting-edge support, effective heat resistance, and carefully controlled cutting conditions.
This drill is manufactured from imported MG grade 0.8 μm submicron tungsten carbide rods with 10% cobalt content, providing a balanced combination of hardness, toughness, and edge strength. Its short 3xD cutting structure improves rigidity, while the optimized drill point helps maintain stable entry and accurate hole positioning under high cutting loads.
With a heat-resistant coating, controlled edge passivation, reinforced core design, and internal or external coolant options, this drill is suitable for customers requiring stable hole quality, reduced edge failure, and reliable batch drilling performance in hardened steel components.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 3xD Carbide Drill for Hardened Steel | Drill Type | Solid Carbide Drill |
| Hole Depth | 3xD | Application | Hardened steel short-hole drilling |
| Workpiece Material | Hardened steel, hardened mold steel, tool steel, die steel and heat-treated alloy steel | Carbide Material | Imported MG Grade 0.8 μm Tungsten Carbide |
| Cobalt Content | 10% | Helix Angle | 30° |
| Point Angle | 138.9° | Rake Angle | Application-Specific Geometry |
| Recommended Hardness | Typically HRC 60, subject to tool configuration | Core Design | 30–40% Variable Core Diameter |
| Negative Chamfer | Reinforced Edge Chamfer | 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 | Depends on material hardness and 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 tungsten carbide with 10% cobalt content for a suitable balance of hardness and toughness.
The carbide substrate helps support the cutting edge under high drilling loads and reduces the risk of premature edge failure when machining hardened steel.
The self-developed high-performance coating helps resist cutting heat, abrasive wear, and coating breakdown during hardened steel drilling.
Controlled edge passivation strengthens the cutting edge and helps reduce micro-chipping while maintaining sufficient cutting sharpness.
The optimized point geometry supports accurate hole positioning and stable entry into hardened workpiece surfaces.
A reinforced cutting edge and balanced drill-point design help distribute cutting loads and reduce drill walking, vibration, and localized edge damage.
The variable core structure improves drill rigidity and supports stable cutting under the higher thrust forces generated when drilling hardened steel.
The flute geometry helps discharge short chips while maintaining sufficient tool strength and reducing the risk of chip congestion inside blind holes.
This 3xD carbide drill for hardened steel is suitable for shallow and short-depth hole machining in CNC machining centers, mold manufacturing, tool and die production, and precision component machining.
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 that the drill is designed to machine holes with a maximum depth of approximately three times the drill diameter. Its short cutting length provides higher rigidity and stable positioning for shallow-hole drilling.
Yes. This drill is developed for short-hole drilling in hardened steel, hardened mold steel, tool steel, and other heat-treated steel materials within the confirmed hardness range.
The recommended hardness range depends on the carbide grade, coating, drill geometry, hole diameter, machine rigidity, and coolant conditions. A typical target range may be HRC 45–55, but the maximum hardness should be confirmed for each application.
Hardened steel generates high cutting forces and concentrated cutting heat. An ordinary drill may experience rapid wear, edge chipping, unstable positioning, or tool breakage. A suitable hardened-steel drill requires a rigid carbide substrate, reinforced cutting edges, heat-resistant coating, and stable drill-point geometry.
The optimized drill point can support direct positioning on stable and relatively flat workpiece surfaces. For inclined, curved, interrupted, or rough surfaces, a spot drill or pilot operation may be recommended.
Please provide the workpiece material grade, HRC hardness, hole diameter, hole depth, through-hole or blind-hole requirement, machine spindle condition, tool-holding method, coolant type, and expected production quantity.
Explore Our Products
We use cookies to collect information about how you use this site. We use this information to make the website work as well as possible and improve our services.more details
