Skip to content We specialize in carbide drill bits for drilling hardened steel, designed for high-precision and high-efficiency CNC machining. Our tools deliver stable performance when drilling hardened steel, tool steel, alloy steel, and other difficult-to-machine materials, even under demanding cutting conditions.
As a professional manufacturer, we provide drill bits for drilling hardened steel with optimized carbide grades, advanced grinding geometry, and strict quality control to ensure long tool life, excellent hole accuracy, and consistent results. Whether you are looking for standard solutions or the best drill bits for drilling hardened steel customized for your application, we support OEM and tailored specifications to meet your machining needs.
Our carbide drill bits for drilling hardened steel are specifically engineered for high-hardness materials, delivering reliable performance in CNC drilling applications. Designed to handle hardened steel with high HRC values, these tools ensure excellent hole accuracy, stable cutting, and extended tool life.
Manufactured from premium solid carbide, these drill bits for drilling hardened steel feature optimized cutting geometry and advanced edge preparation to reduce cutting forces and heat generation. This makes them ideal for drilling tool steel, die steel, alloy steel, and other difficult-to-machine hardened materials.
For customers seeking the best drill bits for drilling hardened steel, we offer both standard and customized solutions. Options include tailored diameters, flute lengths, point angles, and specialized coatings to match specific machining requirements. All products are produced under strict quality control to guarantee consistency, durability, and high drilling efficiency.
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 drilling hardened steel are cutting tools made from solid carbide material, specifically designed to drill high-hardness materials such as hardened steel, tool steel, and die steel. Compared with conventional HSS drills, they offer superior wear resistance, heat resistance, and drilling stability.
Most drill bits for drilling hardened steel are suitable for materials ranging from HRC 45 up to HRC 65, depending on the carbide grade, geometry, and coating. For extremely hard materials, customized carbide solutions are recommended to ensure tool life and drilling accuracy.
Carbide drill bits maintain cutting edge integrity at high temperatures and under heavy cutting loads. This makes them the best drill bits for drilling hardened steel, as they significantly reduce tool wear, improve hole quality, and allow higher cutting speeds compared with HSS drill bits.
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.
Our carbide drill bits for drilling hardened steel are widely used in industries that demand precision and reliability, including mold & die manufacturing, automotive components, aerospace parts, and general precision engineering. They are suitable for drilling hardened steel, tool steel, die steel, and alloy steel with high hardness levels.
Compared with conventional drill bits, these drill bits for drilling hardened steel provide superior stability and reduced tool wear when machining hard materials. Their optimized flute design ensures efficient chip evacuation, even in deep-hole or continuous drilling operations, helping to maintain consistent hole quality and machining efficiency.
Our carbide drill bits for drilling hardened steel are manufactured from premium solid carbide and ground with advanced CNC equipment to achieve precise geometry and excellent edge sharpness. This ensures accurate positioning, smooth cutting, and long tool life in hardened steel drilling applications.
Optimized point angles and cutting edges reduce cutting forces and heat generation, improving performance in high-speed and high-load conditions. For customers seeking the best drill bits for drilling hardened steel, we also offer customized solutions including special coatings, diameters, and drilling depths to meet specific machining requirements.
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 Drilling 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 Drilling Hardened Steel.
Each of your Carbide Drill Bits For Drilling Hardened Steel will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s Carbide Drill Bits For Drilling 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 Drilling 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 drilling hardened steel are cutting tools made from solid carbide material, specifically designed to drill high-hardness materials such as hardened steel, tool steel, and die steel. Compared with conventional HSS drills, they offer superior wear resistance, heat resistance, and drilling stability.
Most drill bits for drilling hardened steel are suitable for materials ranging from HRC 45 up to HRC 65, depending on the carbide grade, geometry, and coating. For extremely hard materials, customized carbide solutions are recommended to ensure tool life and drilling accuracy.
Carbide drill bits maintain cutting edge integrity at high temperatures and under heavy cutting loads. This makes them the best drill bits for drilling hardened steel, as they significantly reduce tool wear, improve hole quality, and allow higher cutting speeds compared with HSS drill bits.
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.
Drilling hardened steel is one of the most challenging operations in modern machining. High hardness, strong abrasion, and intense heat generation can quickly wear out conventional tools and compromise hole quality. This is why carbide drill bits for drilling hardened steel have become the preferred solution for manufacturers seeking accuracy, efficiency, and tool longevity.
In this article, we will explore why hardened steel requires specialized drilling tools, what makes carbide drill bits the optimal choice, and how to select the best drill bits for drilling hardened steel for your application.
Hardened steel typically refers to materials with hardness levels above HRC 45 and often reaching HRC 55–65. These materials are commonly used in molds, dies, automotive components, and precision mechanical parts.
When drilling hardened steel, manufacturers often face several challenges:
Extremely high cutting resistance
Rapid heat buildup at the cutting edge
Accelerated tool wear and edge chipping
Poor chip evacuation and unstable hole quality
Standard high-speed steel (HSS) tools are usually not capable of handling these conditions effectively. As a result, productivity drops and tool costs increase significantly.
Carbide drill bits for drilling hardened steel are specifically engineered to overcome these challenges. Compared with conventional drill bits, solid carbide tools offer several key advantages:
Carbide material maintains its cutting edge even at high temperatures, allowing stable drilling in hardened steel without rapid wear.
Carbide drill bits can withstand the extreme heat generated during high-speed drilling, reducing the risk of thermal deformation and premature failure.
The high stiffness of carbide minimizes vibration during drilling, ensuring accurate hole positioning and improved surface finish.
These properties make carbide tools the most reliable drill bits for drilling hardened steel in demanding CNC machining environments.
Not all carbide drills are the same. High-performance carbide drill bits incorporate specialized design features to maximize efficiency and tool life.
Special point angles and cutting edge designs reduce cutting forces, making it easier to penetrate hardened steel while maintaining stability.
Efficient flute geometry ensures smooth chip evacuation, preventing chip clogging and reducing friction during deep-hole drilling.
High-accuracy grinding guarantees consistent geometry, tight tolerances, and repeatable drilling performance.
These features are essential for manufacturers looking for the best drill bits for drilling hardened steel with consistent and predictable results.
Due to their durability and precision, carbide drill bits are widely used across multiple industries, including:
Mold and die manufacturing
Automotive transmission and engine components
Aerospace structural parts
Precision tooling and mechanical engineering
In these applications, drill bits for drilling hardened steel must deliver not only accurate hole dimensions but also long tool life to reduce downtime and production costs.
Selecting the right carbide drill bit depends on several important factors:
Confirm the hardness range of the steel (HRC value) to ensure the carbide grade is suitable for the application.
Deep-hole drilling may require specialized flute designs and internal coolant options.
Advanced coatings such as TiAlN or AlTiN can further improve heat resistance and extend tool life when drilling hardened steel.
Spindle speed, feed rate, and coolant strategy all influence tool performance and should be matched to the drill design.
Working with an experienced manufacturer ensures you receive carbide drill bits for drilling hardened steel optimized for your specific machining requirements.
While standard carbide drills cover many applications, customized solutions often deliver superior results in hardened steel drilling.
Customized drill bits for drilling hardened steel may include:
Special diameters and drilling depths
Modified point angles and edge preparations
Application-specific coatings
Tailored carbide grades
For complex or high-volume production, customized tools are often the best drill bits for drilling hardened steel, providing better efficiency and longer service life.
Even the best tools require proper usage to achieve optimal performance. To maximize the lifespan of carbide drill bits:
Use stable CNC machines with minimal runout
Apply appropriate cutting parameters
Ensure proper coolant delivery
Avoid excessive feed rates during tool entry
By combining correct machining practices with high-quality carbide drill bits for drilling hardened steel, manufacturers can significantly improve productivity and reduce overall tooling costs.
Drilling hardened steel demands tools that can withstand extreme conditions without sacrificing precision. Carbide drill bits for drilling hardened steel offer unmatched hardness, heat resistance, and stability, making them the preferred choice for modern CNC machining.
Whether you are using standard tools or searching for the best drill bits for drilling hardened steel through customized solutions, selecting the right carbide drill bit is essential for achieving consistent, high-quality drilling results in hardened materials.
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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