Skip to content Carbide drill bits for hardened steel are designed to deliver reliable performance in high-hardness metal drilling applications. Manufactured from ultra-fine grain solid carbide, these drills provide exceptional rigidity, wear resistance, and dimensional stability when machining hardened steel, tool steel, and other difficult-to-cut materials.
Our solid carbide drill bits for hardened steel feature optimized point geometry and polished flutes to ensure smooth chip evacuation, reduced cutting forces, and consistent hole accuracy. With advanced coating options, the drills offer improved heat resistance and extended tool life at high cutting speeds. These tungsten carbide drill bits for hardened steel are ideal for CNC machining, mold making, and precision manufacturing, supporting both metric and inch sizes as well as customized lengths and specifications.
Grade HN40 is made from submicron WC powder, some speclal additlves added to optimize theproperties with good combination of hardness and toughness.
Its suitable for making drills and miling tools for machining stainless steel, tool steel and heat-resistingalloys.
| Grade | Cobalt content % | Grain size | Density g/cm³ | Hardness HRA | Hardness HV30 | MPa Transverse rupture strength | MPa ·m1/2 Fracture toughness MPa ·m1/2 |
|---|---|---|---|---|---|---|---|
| HN40 | 10 | 0.8 | 14.45 | 91.8 | 1,580 | 3,600 | 11.8 |
| Scientific name | Composition | Physical properties | Features | Typical applications |
|---|---|---|---|---|
| TiXCo3 | Advanced nanocomposite multilayer PVD coating based on Ti, Al, Cr and Si; usually built with a TiN or CrTiN adhesion layer, an AlTi(Si)N core and an extremely hard TiSiN nano-composite top layer. Copper-coloured coating designed specifically for hard-machining tools such as solid carbide drills. | Nano-hardness: 42–44 GPa (≈4300–4500 HV). Coefficient of friction: ~0.4 (PoD test, room temperature, 50 % humidity). Coating thickness: typically 1–4 µm. Maximum service temperature up to about 1,000–1,100 °C, giving excellent thermal stability and oxidation resistance for high-speed drilling in hard materials. | Copper appearance; delivers very high surface quality of the hole and extremely high wear resistance. Our hardest nanocomposite coating, optimized for hard machining and finishing operations in drilling, milling and reaming at very high cutting speeds. Suitable for dry or near-dry machining and for difficult-to-cut, abrasive alloys where long, stable tool life is required. | Recommended workpiece materials: hardened steels (up to ~60–64 HRC), stainless steels, tool steels, nickel-based superalloys, cast irons and other hard or abrasive metals. Typical application fields for drills: high-precision deep-hole and high-speed production drilling of dies and moulds, power-train and transmission components, aerospace turbine and structural parts, and other hard-machining operations demanding tight tolerances and excellent hole finish. |
Carbide drill bits for hardened steel are designed for drilling high-hardness materials such as hardened steel, tool steel, heat-treated alloys, and other difficult-to-machine metals. They are commonly used in CNC machining, mold and die manufacturing, automotive components, and precision mechanical parts where accuracy and tool life are critical.
Solid carbide drill bits for hardened steel offer significantly higher rigidity, heat resistance, and wear resistance compared to HSS or cobalt drills. This allows them to maintain sharp cutting edges at higher speeds and temperatures, resulting in improved hole accuracy, longer tool life, and more stable drilling performance in hardened materials.
Yes, tungsten carbide drill bits for hardened steel are ideal for CNC machining. Their rigidity and dimensional stability make them well-suited for high-speed, automated drilling operations where consistency, repeatability, and minimal tool deflection are required.
Yes. We can produce non-standard tools according to your drawings, samples or machining requirements (material, coating, size, tolerance and application). Our engineers will evaluate and provide a quotation and lead time.
For serious buyers and distributors, we can offer free standard samples if in stock. Usually you only need to cover the freight cost. For customized tools, a sample fee may apply, which can be refunded or deducted in bulk orders.
Yes.
Regional or customer protection based on sales targets, avoiding price wars among our partners.
Catalogs, brochures, product photos, technical data sheets, online materials.
For key partners, joint promotion, exhibitions and digital marketing support.
Safety stock for fast-moving items and forecast-based production.
Priority production and regular shipments to reduce stock-out risk.
Clear quality warranty policy, quick response to claims.
Replacement, credit or other solutions after confirmation of issues.
Tool selection and cutting parameter advice.
Problem analysis for different materials and machines.
Online training, documents, and when possible, on-site support for key accounts.
Carbide drill bits for hardened steel are widely used in precision machining environments such as mold making, automotive components, tooling production, and industrial manufacturing. Designed to handle high hardness materials, these drills perform reliably when machining hardened steel, alloy steel, and heat-treated parts where dimensional accuracy and surface quality are critical.
Compared with conventional drills, solid carbide drill bits for hardened steel offer superior rigidity and heat resistance, enabling stable drilling at higher speeds and feeds. With optimized cutting geometry and advanced coatings, tungsten carbide drill bits for hardened steel help reduce tool wear, improve hole consistency, and extend tool life across a wide range of CNC drilling applications.
Each carbide drill bit for hardened steel is manufactured from ultra-fine grain carbide and precision-ground to ensure excellent strength, wear resistance, and cutting stability. Optimized point angles and flute designs support smooth chip evacuation and reduce cutting forces, even when drilling high-hardness materials.
Engineered for demanding production environments, our best carbide drill bits for hardened steel deliver consistent hole accuracy and long service life under continuous machining conditions. These drills are suitable for CNC machines and support both metric and inch sizes, making solid carbide drill bits for hardened steel a reliable solution for high-precision and high-efficiency metal drilling tasks.
We Are Commited To Providing High-Quality, Customized solutions At An Affordable price While Also Prioritizing sustainability And ExcellentCustomer Service, These Qualities Make Us A Great choice For Your Carbide Drill Bits For Hardened Steel Needs.
We Only Use unground tungsten carbide rods with HlP sintering and100% virgin material. Our grade includes lsO K05 to K40, frommachining carbon steel to aluminium, non-ferrous metals andtitanium or we develop grade for your applications.
As a HNCarbide customer, you can enjoy five-axis high-precisiongrinding machines from Australia’s ANCA or Germany’s Walter. Themodern workshop with constant temperature and humidity ensuresthe accuracy of each Carbide Drill Bits For Hardened Steel.
Each of your Carbide Drill Bits For Hardened Steel will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s Carbide Drill Bits For Hardened Steel will be monitored on WALTER HELICHEEK and ZOLLER GENlUS 3 to ensure that every dimension is qualified. We arecommitted to controlling the tolerance within 3 UM.
At HNCarbide, every shipment is meticulously packaged to ensure your tools arrive intact.
Each HNCarbide’s Carbide Drill Bits For Hardened Steel is individually placed in a shock-resistant protective case, labeled with complete specifications, and sealed in moisture-proof packaging material before being boxed.
Large-volume orders are reinforced with double-wall cardboard boxes or wooden crates to maximize safety during international shipping.
We collaborate with reliable logistics partners to ensure goods are delivered quickly and securely to their destination via air freight, sea freight, or express courier.
Carbide drill bits for hardened steel are designed for drilling high-hardness materials such as hardened steel, tool steel, heat-treated alloys, and other difficult-to-machine metals. They are commonly used in CNC machining, mold and die manufacturing, automotive components, and precision mechanical parts where accuracy and tool life are critical.
Solid carbide drill bits for hardened steel offer significantly higher rigidity, heat resistance, and wear resistance compared to HSS or cobalt drills. This allows them to maintain sharp cutting edges at higher speeds and temperatures, resulting in improved hole accuracy, longer tool life, and more stable drilling performance in hardened materials.
Yes, tungsten carbide drill bits for hardened steel are ideal for CNC machining. Their rigidity and dimensional stability make them well-suited for high-speed, automated drilling operations where consistency, repeatability, and minimal tool deflection are required.
Yes. We can produce non-standard tools according to your drawings, samples or machining requirements (material, coating, size, tolerance and application). Our engineers will evaluate and provide a quotation and lead time.
For serious buyers and distributors, we can offer free standard samples if in stock. Usually you only need to cover the freight cost. For customized tools, a sample fee may apply, which can be refunded or deducted in bulk orders.
Yes.
Regional or customer protection based on sales targets, avoiding price wars among our partners.
Catalogs, brochures, product photos, technical data sheets, online materials.
For key partners, joint promotion, exhibitions and digital marketing support.
Safety stock for fast-moving items and forecast-based production.
Priority production and regular shipments to reduce stock-out risk.
Clear quality warranty policy, quick response to claims.
Replacement, credit or other solutions after confirmation of issues.
Tool selection and cutting parameter advice.
Problem analysis for different materials and machines.
Online training, documents, and when possible, on-site support for key accounts.
Machining hardened steel presents one of the greatest challenges in modern metalworking. Materials with high hardness, strong abrasion resistance, and low thermal conductivity demand drilling tools that can withstand extreme cutting conditions while maintaining precision and tool life. This is where carbide drill bits for hardened steel play a critical role in achieving reliable and efficient drilling results.
Unlike conventional high-speed steel drills, carbide-based tools are specifically engineered to handle the mechanical and thermal stresses generated during hardened steel machining. Understanding how these drills work, how to select the right type, and how to use them effectively is essential for manufacturers seeking stable quality and productivity.
Hardened steel typically refers to materials that have undergone heat treatment, often reaching hardness levels above HRC 45 and in some cases exceeding HRC 60. Drilling such materials requires tools with exceptional rigidity, edge strength, and heat resistance.
Carbide drill bits for hardened steel are manufactured from ultra-fine grain carbide substrates that provide significantly higher hardness and compressive strength compared to HSS or cobalt drills. This allows the cutting edge to remain sharp and stable even under high cutting loads and elevated temperatures.
Additionally, carbide drills offer superior wear resistance, which is critical when drilling hardened materials that generate abrasive chips and intense friction at the cutting zone.
When comparing drilling solutions for hardened steel, tool material selection is one of the most important considerations.
Solid carbide drill bits for hardened steel outperform cobalt and HSS drills in nearly all high-hardness applications. While cobalt drills may handle moderately hardened materials, they often struggle with rapid edge wear and heat deformation when used on fully hardened steel.
In contrast, tungsten carbide drill bits for hardened steel maintain structural integrity at higher spindle speeds and cutting temperatures. Their rigidity minimizes tool deflection, ensuring accurate hole positioning, consistent diameters, and improved surface finish.
For CNC machining centers, solid carbide drills are especially advantageous due to their compatibility with high-speed, automated drilling cycles.
Tool geometry has a direct impact on drilling performance in hardened materials. Optimized point angles, web thickness, and flute design are essential features of high-quality carbide drill bits for hardened steel.
A properly engineered point geometry reduces thrust force and prevents excessive heat buildup at the cutting edge. Polished flutes improve chip evacuation, minimizing the risk of chip packing and tool breakage during deep-hole drilling.
Advanced flute designs also help stabilize cutting action, reducing vibration and improving hole straightness in hardened steel components.
Coating technology plays a critical role in extending tool life when drilling hardened steel. Modern carbide drill bits for hardened steel are often coated with advanced PVD or nano-layer coatings that improve surface hardness and thermal stability.
These coatings reduce friction between the drill and workpiece, lower cutting temperatures, and protect the carbide substrate from oxidation and wear. As a result, coated drills can operate at higher cutting speeds while maintaining consistent performance.
When selecting the best carbide drill bits for hardened steel, coating choice should be aligned with cutting speed, material hardness, and coolant strategy.
Coolant delivery is another key factor in hardened steel drilling. Internal coolant carbide drills deliver coolant directly to the cutting edge, providing superior heat dissipation and chip evacuation.
For deep-hole applications and continuous production environments, internal coolant solid carbide drill bits for hardened steel offer significant advantages in tool life and process stability. External coolant drills, while still effective, may require reduced cutting parameters to prevent overheating.
Selecting the appropriate coolant configuration ensures optimal cutting conditions and reduces the risk of premature tool failure.
Carbide drill bits for hardened steel are widely used across multiple industries, including mold and die manufacturing, automotive components, aerospace tooling, and precision mechanical parts.
Typical applications include drilling hardened tool steel inserts, heat-treated shafts, bearing components, and structural parts where dimensional accuracy and surface integrity are critical.
In high-volume CNC production, carbide drills enable consistent performance, reduced downtime, and predictable tool replacement intervals.
To maximize the performance of carbide drill bits for hardened steel, proper machining parameters must be applied. Stable fixturing, rigid machine setups, and controlled feed rates are essential to prevent vibration and edge chipping.
Using appropriate spindle speeds, maintaining consistent coolant flow, and avoiding sudden tool engagement help extend tool life and improve hole quality. Regular inspection of cutting edges ensures timely tool replacement before catastrophic failure occurs.
Selecting the best carbide drill bits for hardened steel requires careful consideration of material hardness, hole depth, machine capability, and production volume. Factors such as drill diameter tolerance, coating type, and coolant configuration should align with the specific machining application.
Custom solutions, including special geometries and length options, can further optimize performance for demanding drilling tasks.
Hardened steel machining demands precision, stability, and durability—qualities that only well-engineered carbide drills can deliver. Carbide drill bits for hardened steel provide the strength, heat resistance, and accuracy required for modern CNC machining environments.
By choosing high-quality solid carbide drill bits for hardened steel and applying proper machining practices, manufacturers can achieve consistent hole quality, longer tool life, and improved productivity in even the most challenging hardened steel applications.
Before you go, please note that we offer the most up-to-date industry research reports and the most comprehensive product catalogs, so please contact us if you are interested!
Before you go, please note that we offer the most up-to-date industry research reports and the most comprehensive product catalogs, so please contact us if you are interested!
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