Designed for demanding extra-deep-hole drilling in cast iron materials, this 20xD carbide drill combines imported MG grade 0.8 μm carbide, ALTISIXN wear-resistant coating, optimized point geometry, reinforced extra-deep-hole flute structure, and reliable chip removal support to improve powdery chip discharge, resist abrasive wear, reduce edge chipping, and maintain stable hole straightness in precision cast iron machining.
The 20xD carbide drill for cast iron is designed for demanding extra-deep-hole applications where abrasive wear resistance, powdery chip discharge, hole straightness, flute rigidity, and process stability are critical. Compared with 12xD or 15xD drilling, 20xD cast iron machining places significantly higher demands on pilot hole accuracy, spindle runout, chip removal, tool holding, and machine rigidity.
Cast iron materials such as grey cast iron, ductile iron, nodular cast iron, and compacted graphite iron contain abrasive particles that can accelerate cutting edge wear. Powdery chips, graphite particles, hard casting skin, and variations in the cast structure may also increase the risk of micro-chipping or unstable tool load.
In a 20xD hole, chips and abrasive particles must travel a very long distance before leaving the cutting zone. Insufficient chip removal may increase friction inside the hole, accelerate flute wear, affect hole straightness, damage the hole wall, or cause premature drill failure.
This 20xD carbide drill is manufactured from imported MG grade 0.8 μm tungsten carbide rods with 10% cobalt content, supporting tool rigidity and edge stability. Combined with ALTISIXN coating, reinforced flute geometry, controlled edge preparation, application-matched chip removal support, Walter inspection, and German Walter 5-axis grinding, it helps maintain reliable drilling performance and consistent hole quality in extra-deep cast iron applications.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 20xD Carbide Drill for Cast Iron | Drill Type | Solid Carbide Extra-Deep-Hole Drill |
| Hole Depth | 20xD | Application | Extra-deep-hole drilling in cast iron materials |
| 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% | 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 |
Key Features
Made from imported MG grade 0.8 μm tungsten carbide with 10% cobalt content.
The fine carbide grain structure helps provide the rigidity, edge strength, and dimensional stability required for extra-deep cast iron hole drilling.
ALTISIXN coating helps protect the cutting edge and flute surfaces against abrasive wear during cast iron machining.
It supports stable cutting performance, reduces premature edge wear, and helps improve tool life throughout the long drilling cycle.
Internal coolant or air-blast support can be selected according to the cast iron grade, machine configuration, and chip removal requirement.
Stable removal of powdery chips and graphite particles helps reduce internal friction, flute wear, and chip accumulation in 20xD holes.
Reinforced flute geometry balances chip space and drill rigidity for extra-deep-hole machining.
The variable core design and back taper help reduce friction, improve powdery chip flow, protect the cutting edge, and support better hole straightness.
This 20xD carbide drill for cast iron is suitable for extra-deep-hole machining in CNC machining centers and automated production equipment. It is intended for cast iron applications where abrasive wear resistance, long-distance chip discharge, edge protection, hole straightness, and reliable batch performance 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
20xD means the drill is designed to produce holes up to 20 times its diameter. For example, a 5 mm drill can be used for a hole depth of approximately 100 mm under suitable machining conditions.
Yes. This 20xD carbide drill is designed for grey cast iron, ductile iron, nodular cast iron, compacted graphite iron, and other cast iron materials under suitable machining conditions.
The drill uses ALTISIXN wear-resistant coating, which helps improve abrasive wear resistance, cutting edge protection, and drilling stability in cast iron extra-deep-hole applications.
The chip removal method should be selected according to the cast iron grade and machine condition. Internal coolant may be used for suitable applications, while air-blast support may be preferred in other cast iron drilling conditions. Stable chip removal is essential for 20xD holes.
A 20xD drill has a longer unsupported body and a longer chip discharge path than a 15xD drill. It requires more accurate pilot guidance, lower spindle runout, stronger flute rigidity, and more stable machine conditions.
Cast iron contains abrasive particles and usually produces powdery chips. In 20xD drilling, abrasive chips must travel a long distance through the flutes, increasing the risk of flute wear, internal friction, edge chipping, and unstable hole straightness.
Yes. We support customized diameter, flute length, overall length, shank size, coolant channel, ALTISIXN coating, chip removal configuration, and matching pilot drill according to drawings and machining requirements.
Yes. Regrinding service is available depending on drill size, wear condition, and application requirements.
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