Designed for stable deep-hole drilling in steel materials, this 12xD carbide drill combines imported MG grade 0.8 μm carbide, ALTISIXN wear-resistant coating, optimized point geometry, reinforced deep-hole flute structure, and internal coolant support to improve chip evacuation, hole straightness, wear resistance, and drilling reliability in long-depth steel hole machining.
The 12xD carbide drill for steel is designed for deep-hole machining applications where chip evacuation, hole straightness, tool rigidity, and cutting stability are critical. Compared with 5xD or 8xD drilling, 12xD steel drilling has a longer chip evacuation path and higher requirements for coolant delivery, flute strength, and drilling process stability.
Steel materials such as carbon steel, alloy steel, structural steel, pre-hardened steel, and bearing steel can generate continuous chips and cutting heat during deep-hole drilling. If chips cannot be removed smoothly, cutting resistance increases, hole accuracy becomes unstable, and tool wear may accelerate. In 12xD holes, internal coolant support is especially important for chip removal, heat control, and stable hole quality.
This 12xD carbide drill is manufactured from imported MG grade 0.8 μm tungsten carbide rods with 10% cobalt content, supporting high-speed cutting and stable tool strength. Combined with ALTISIXN wear-resistant coating, optimized point geometry, reinforced flute structure, controlled edge preparation, and German Walter precision grinding, it helps maintain drilling stability, reduce wear, and improve hole consistency in deep steel drilling applications.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 12xD Carbide Drill for Steel | Drill Type | Solid Carbide Deep-Hole Drill |
| Hole Depth | 12xD | Application |
|
| 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 |
| Drill Diameter (mm) | Flute Length (mm) | Shank Diameter (mm) | Overall Length (mm) | Hole Depth | Coolant Type | Availability |
|---|---|---|---|---|---|---|
| D3.10-D4.00 | 54 | 4 | 92 | 12xD | Internal / External | Standard |
| D4.10-D4.70 | 64 | 6 | 102 | 12xD | Internal / External | Standard |
| D4.80-D6.00 | 83 | 6 | 121 | 12xD | Internal / External | Standard |
| D6.10-D8.00 | 110 | 8 | 148 | 12xD | Internal / External | Standard |
| D8.10-D10.0 | 138 | 10 | 180 | 12xD | Internal / External | Standard |
| D10.1-D12.0 | 158 | 12 | 206 | 12xD | Internal / External | Standard |
| D12.1-D14.0 | 182 | 14 | 230 | 12xD | Internal / External | Standard |
| D14.0-D16.0 | 208 | 16 | 260 | 12xD | Internal / External | Standard |
| D16.1-D18.0 | 234 | 18 | 285 | 12xD | Internal / External | Standard |
| D18.1-D20.0 | 258 | 20 | 310 | 12xD | Internal / External | Standard |
Key Features
Made from imported MG grade 0.8 μm tungsten carbide with 10% cobalt content.
The fine carbide grain structure helps support tool rigidity, edge strength, and stable cutting performance in deep steel hole machining.
ALTISIXN coating helps improve wear resistance, heat resistance, and edge protection during steel drilling.
It supports stable cutting performance, reduces premature edge wear, and helps extend tool life in 12xD deep-hole applications.
Optimized drill point geometry supports stable entry and accurate hole positioning.
A stable drill point helps reduce drill walking and improves the starting accuracy before deep-hole cutting.
Reinforced flute geometry improves chip evacuation and tool rigidity in 12xD drilling.
The variable core design and back taper help reduce chip clogging, protect the cutting edge, and maintain hole straightness.
This 12xD carbide drill for steel is suitable for deep-hole machining in CNC machining centers and production drilling applications. It is especially useful for steel components where long chip evacuation, internal coolant delivery, hole straightness, wear resistance, and batch stability 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
12xD means the drill is designed for hole depths up to 12 times the drill diameter. It is used for deeper hole machining where chip evacuation, tool rigidity, coolant delivery, and hole straightness are more demanding.
Yes. This 12xD carbide drill is suitable for carbon steel, alloy steel, structural steel, pre-hardened steel, bearing steel, and other steel materials under suitable machining conditions.
This drill uses ALTISIXN wear-resistant coating, which helps improve edge protection, heat resistance, and tool life in steel deep-hole drilling applications.
An 8xD drill is used for deep-hole drilling, while a 12xD drill is designed for even deeper holes with longer chip evacuation distance. 12xD drilling requires stronger coolant support, better flute rigidity, more careful runout control, and stable process conditions.
Yes. Internal coolant is strongly recommended for 12xD steel drilling because it helps remove chips, control cutting heat, reduce chip clogging, and maintain stable hole quality in deeper holes.
For better starting stability and hole accuracy, a pilot hole or guide hole is recommended in many 12xD drilling applications. The actual process should be confirmed according to drill diameter, machine condition, workpiece material, and tolerance requirement.
Yes. We support customization based on drawings, steel grade, diameter, hole depth, coolant method, ALTISIXN coating requirement, shank size, and drilling application.
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