Designed for stable deep-hole drilling in cast iron materials, this 8xD carbide drill combines imported submicron carbide, ALTISIXN wear-resistant coating, optimized point geometry, and reinforced flute structure to resist abrasive wear, improve powdery chip discharge, reduce edge chipping, and maintain reliable hole straightness in deeper cast iron drilling applications.
The 8xD carbide drill for cast iron is developed for deeper hole machining where abrasive wear, powdery chip discharge, edge chipping, and hole straightness are more demanding than medium-depth drilling. Compared with 3xD and 5xD drills, 8xD cast iron drilling requires stronger flute rigidity, more stable chip discharge, better edge protection, and reliable drilling consistency over a longer hole depth.
Cast iron materials such as grey cast iron, ductile iron, nodular cast iron, and compacted graphite iron are highly abrasive during machining. Powdery chips, hard casting skin, and uneven cast surfaces can accelerate cutting edge wear and increase the risk of micro-chipping. In deeper 8xD holes, chip discharge distance becomes longer, making flute design, coolant support, and coating protection especially important.
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 deep-hole flute structure, and controlled edge preparation, it helps improve wear resistance, chip discharge, hole straightness, and stable batch drilling performance in cast iron components.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 8xD Carbide Drill for Cast Iron | Drill Type | Solid Carbide Drill |
| Hole Depth | 8xD | Application | Deep-hole Cast Iron drilling |
| Workpiece Material | Grey cast iron, ductile iron, nodular cast iron, compacted graphite iron | 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 hardness and toughness.
Helps maintain edge stability and drilling accuracy in abrasive deep-hole cast iron machining.
ALTISIXN coating is selected for cast iron drilling where abrasive wear is a major challenge.
It helps protect the cutting edge, reduce flank wear, and improve tool stability in cast components.
30° helix and 138.9° point angle support stable entry and accurate hole positioning.
Split-point design helps reduce drill walking and improve stability on cast surfaces and casting skin.
Reinforced flute geometry improves powdery chip discharge and tool rigidity in 8xD drilling.
Variable core design and back taper help reduce chip accumulation, protect the edge, and maintain hole straightness.
This 8xD carbide drill for cast iron is suitable for deep-hole machining in CNC machining centers and production drilling applications. It is especially useful for cast iron components where abrasive wear, powdery chip discharge, casting skin, 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 cast iron drilling, helping improve abrasive wear resistance, powdery chip discharge, edge stability, and hole consistency under suitable machining conditions.
ALTISIXN is a wear-resistant coating used to improve drilling stability in abrasive materials such as cast iron. It helps protect the cutting edge, reduce wear, and support longer tool life during production drilling.
A 5xD drill is used for medium-depth holes, while an 8xD drill is designed for deeper holes that require stronger chip discharge, better rigidity, improved coolant support, and more stable hole straightness.
Internal coolant is recommended when chip discharge and hole quality are critical in deeper holes. However, cast iron can also be machined dry or with external coolant depending on machine conditions, material grade, and application requirements.
Yes. The optimized point geometry, reinforced edge design, and ALTISIXN wear-resistant coating help improve stability when drilling cast surfaces or components with casting skin.
Yes. We support customization based on drawings, cast iron grade, diameter, hole depth, coolant method, ALTISIXN coating requirement, and drilling application.
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
