Designed for demanding extra-deep-hole drilling in stainless 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, control cutting heat, reduce work hardening, and maintain reliable hole straightness.
The 30xD carbide drill for stainless steel is designed for highly demanding extra-deep-hole applications where chip evacuation, cutting heat control, pilot guidance, hole straightness, coolant delivery, 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 places much higher demands on pilot hole accuracy, spindle runout, tool holder condition, machine rigidity, coolant pressure, flute consistency, and cutting parameter control.
Stainless steel materials such as 304, 316L, 17-4PH, and duplex stainless steel have high toughness, poor thermal conductivity, and a strong tendency to work-harden. Cutting heat remains concentrated around the drill point, while continuous and difficult-to-break chips must travel through an extremely long flute path.
Insufficient coolant delivery or unstable chip evacuation may cause chip packing, heat buildup, work hardening, increased torque, cutting edge overload, hole deviation, burr formation, poor hole wall quality, or premature drill breakage. Stable cutting engagement and continuous chip removal are therefore essential throughout the 30xD drilling cycle.
This carbide drill is manufactured from imported MG grade 0.8 μm tungsten carbide rods with 10% cobalt content, supporting drill rigidity and edge stability. Combined with ALTISIXN coating, reinforced flute geometry, internal coolant channels, controlled edge preparation, Walter inspection, and German Walter 5-axis grinding, it helps maintain reliable drilling performance and consistent hole quality in extra-deep stainless steel machining.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 30xD Carbide Drill for Stainless Steel | Drill Type | Solid Carbide Extra-Deep-Hole Drill |
| Hole Depth | 30xD | Application | Extra-deep-hole drilling in stainless steel materials |
| 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% | 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 stainless steel hole drilling.
ALTISIXN coating helps protect the cutting edge against wear and concentrated cutting heat during stainless 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 stainless steel chips through the long flutes.
Stable coolant pressure and sufficient flow are critical for controlling cutting heat, reducing work hardening, and preventing chip packing or edge overload.
Reinforced flute geometry balances chip space and drill rigidity for long-depth stainless steel 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 stainless 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, cutting heat control, 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 304, 316L, 17-4PH, duplex stainless steel, and other stainless steel alloys under suitable machining conditions.
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.
The drill uses ALTISIXN wear-resistant coating, which helps improve cutting edge protection, wear resistance, thermal protection, and drilling stability during extra-deep stainless steel machining.
Internal coolant is required for most 30xD stainless steel drilling applications. It helps carry chips through the long flutes, control concentrated cutting heat, reduce work hardening, and protect the cutting edge.
Stainless steel has high toughness, poor thermal conductivity, and a strong tendency to work-harden. In 30xD drilling, cutting heat is difficult to remove and chips must travel through an extremely long flute path, increasing the risk of chip packing, edge overload, hole deviation, and tool breakage.
Pilot hole accuracy, spindle runout, tool holder condition, machine rigidity, drill geometry, coolant pressure, feed stability, stainless steel consistency, and workpiece setup can all affect hole straightness.
Rubbing and repeated dwell may increase cutting heat and cause the stainless steel around the cutting area to work-harden. Stable cutting engagement helps reduce heat buildup, edge wear, and premature tool failure.
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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