Designed for stable deep-hole drilling in stainless steel materials, this 8xD carbide drill combines imported submicron carbide, ALTISIXN wear-resistant coating, optimized point geometry, and reinforced flute structure to improve chip evacuation, control cutting heat, reduce work hardening, and maintain reliable hole straightness in deeper stainless steel drilling applications.
The 8xD carbide drill for stainless steel is developed for deeper hole machining where chip evacuation, heat control, tool rigidity, and hole straightness are critical. Compared with 3xD and 5xD stainless steel drilling, 8xD applications require more stable coolant delivery, stronger flute support, and more reliable chip control over a longer drilling depth.
Stainless steel materials such as 304, 316L, 17-4PH, and duplex stainless steel are known for high toughness, poor thermal conductivity, and strong work-hardening tendency. In deeper 8xD holes, chips travel a longer distance before leaving the hole, which increases the risk of chip clogging, heat buildup, cutting edge overload, and unstable hole quality.
This drill is manufactured from imported MG grade 0.8 μm submicron tungsten carbide rods with 10% cobalt content. Combined with ALTISIXN wear-resistant coating, optimized point geometry, reinforced flute structure, controlled edge preparation, and internal coolant support, it helps improve chip evacuation, reduce work hardening, protect the cutting edge, and maintain stable drilling performance in stainless steel components.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 8xD Carbide Drill for Stainless Steel | Drill Type | Solid Carbide Drill |
| Hole Depth | 8xD | Application | Deep-hole stainless steel drilling |
| Workpiece Material | 304, 316L, 17-4PH, duplex stainless steel, stainless steel alloys | 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 | ALTISIXN Wear-Resistant 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-D3.30 | 30 | 4 | 70 | 8xD | Internal / External | Standard |
| D3.40-D3.70 | 35.5 | 4 | 75 | 8xD | Internal / External | Standard |
| D3.80-D4.00 | 42 | 4 | 83 | 8xD | Internal / External | Standard |
| D4.10-D5.00 | 50 | 6 | 90 | 8xD | Internal / External | Standard |
| D5.10-D6.00 | 57 | 6 | 97 | 8xD | Internal / External | Standard |
| D6.10-D6.80 | 66 | 8 | 106 | 8xD | Internal / External | Standard |
| D6.90-D8.00 | 76 | 8 | 116 | 8xD | Internal / External | Standard |
| D8.10-D10.0 | 95 | 10 | 139 | 8xD | Internal / External | Standard |
| D10.1-D12.0 | 114 | 12 | 163 | 8xD | Internal / External | Standard |
| D12.1-D14.0 | 133 | 14 | 182 | 8xD | Internal / External | Standard |
| D14.1-D16.0 | 152 | 16 | 204 | 8xD | Internal / External | Standard |
| D16.1-D18.0 | 171 | 18 | 223 | 8xD | Internal / External | Standard |
| D18.1-D20.0 | 190 | 20 | 244 | 8xD | Internal / External | Standard |
Key Features
Made from imported 0.8 μm submicron carbide with 10% cobalt for toughness and rigidity.
Helps maintain edge stability and drilling accuracy in deep stainless steel hole machining.
ALTISIXN coating helps improve wear resistance and heat protection in stainless steel drilling.
It supports longer cutting stability, reduced edge wear, and better performance under high cutting heat.
30° helix and 138.9° point angle support stable entry and accurate hole positioning.
Split-point design helps reduce drill walking and minimize work hardening during hole entry.
Reinforced flute geometry improves chip evacuation and tool rigidity in 8xD drilling.
Variable core design and back taper help reduce chip clogging, protect the edge, and maintain hole straightness.
This 8xD carbide drill for stainless steel is suitable for deep-hole machining in CNC machining centers and precision drilling applications. It is especially useful for stainless steel components where chip evacuation, work hardening control, cutting heat, hole straightness, and batch consistency must be controlled.
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
8xD means the drill is designed for hole depths up to 8 times the drill diameter.
Yes. This drill is designed for deep-hole stainless steel drilling, helping improve chip evacuation, reduce work hardening, control cutting heat, and maintain stable hole quality.
ALTISIXN is a wear-resistant coating used to improve edge protection, heat resistance, and tool life in stainless steel drilling applications. It helps reduce wear and maintain stable cutting performance during deeper hole machining.
A 5xD drill is used for medium-depth holes, while an 8xD drill is designed for deeper holes that require stronger chip evacuation, better coolant support, improved rigidity, and more stable hole straightness.
It is suitable for 304, 316L, 17-4PH, duplex stainless steel, austenitic stainless steel, martensitic stainless steel, and precipitation hardening stainless steel under suitable machining conditions.
Yes. Internal coolant is recommended for 8xD stainless steel drilling because it helps remove chips, control cutting heat, reduce chip clogging, and maintain stable hole quality in deeper holes.
Yes. We support customization based on drawings, stainless steel grade, diameter, hole depth, coolant method, ALTISIXN coating requirement, and drilling application.
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