Designed for demanding extra-deep-hole drilling in steel materials, this 30xD carbide drill combines imported MG grade 0.8 μm carbide, ALTISIXN wear-resistant coating, optimized point geometry, reinforced extra-deep-hole flute structure, precision pilot-hole guidance, and internal coolant channels to improve long-distance chip evacuation, hole straightness, edge protection, and machining stability.
The 30xD carbide drill for steel is designed for highly demanding extra-deep-hole applications where chip evacuation, pilot guidance, hole straightness, coolant delivery, tool rigidity, and process stability are critical.
Compared with 15xD or 20xD drilling, a 30xD application has a significantly longer unsupported drill body and chip evacuation path. It therefore places much higher demands on pilot hole accuracy, spindle runout, tool holder condition, machine rigidity, coolant pressure, flute consistency, and cutting parameter control.
Steel materials such as carbon steel, alloy steel, structural steel, pre-hardened steel, and bearing steel may generate continuous chips and cutting heat during drilling. In a 30xD hole, chips must travel an extremely long distance before leaving the cutting zone.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 30xD Carbide Drill for Steel | Drill Type | Solid Carbide Extra-Deep-Hole Drill |
| Hole Depth | 30xD | Application | Extra-deep-hole drilling in steel materials |
| 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 |
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 demanding extra-deep steel hole drilling.
ALTISIXN coating helps protect the cutting edge against wear and cutting heat during steel machining.
It supports stable cutting performance, reduces premature edge wear, and helps protect the drill throughout the extended 30xD drilling cycle.
Internal coolant channels deliver cutting fluid close to the drill point and help carry chips through the long flutes.
Stable coolant pressure and sufficient flow are particularly important for preventing chip packing, heat buildup, and edge overload in 30xD holes.
Reinforced flute geometry balances chip space and drill rigidity for long-depth machining.
The variable core design and back taper help reduce internal friction, improve chip flow, protect the cutting edge, and support better hole straightness.
This 30xD carbide drill for steel is suitable for highly demanding extra-deep-hole machining in CNC machining centers and automated production equipment. It is intended for applications where long-distance chip evacuation, internal coolant delivery, hole straightness, dimensional consistency, 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
30xD means the drill is designed to produce a hole up to 30 times its diameter. For example, a 5 mm drill can be used for a drilling depth of approximately 150 mm under suitable machining conditions.
Yes. This 30xD carbide drill is designed for carbon steel, alloy steel, structural steel, pre-hardened steel, bearing steel, and related steel materials under suitable machining conditions.
The drill uses ALTISIXN wear-resistant coating, which helps improve cutting edge protection, wear resistance, heat resistance, and drilling stability during extra-deep steel machining.
A 30xD drill has a longer unsupported body and a significantly longer chip evacuation path than a 20xD drill. It requires more accurate pilot guidance, lower spindle runout, stronger coolant delivery, better tool holding, and more stable machine conditions.
Internal coolant is required for most 30xD drilling applications. It helps carry chips through the long flute path, control cutting heat, reduce chip packing, and protect the cutting edge.
Yes. However, the effective drilling depth must allow space for the drill point and chip evacuation. The required blind-hole depth and bottom geometry should be confirmed before drill selection.
Pilot hole accuracy, spindle runout, tool holder condition, machine rigidity, drill geometry, coolant pressure, feed stability, material consistency, and workpiece setup can all affect hole straightness.
Yes. We support customized diameter, flute length, overall length, shank size, coolant channel, ALTISIXN coating, edge preparation, and matching pilot drills according to drawings and machining requirements.
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