Skip to content Our drill bits for hardened steel are engineered for precision drilling in hardened steel materials ranging from HRC45 to HRC65. Designed to handle high cutting resistance and elevated temperatures, these tools deliver stable performance, excellent hole accuracy, and extended tool life in demanding metalworking applications.
The product line includes carbide drill bits for hardened steel and solid carbide drill bits for hardened steel, manufactured from premium-grade tungsten carbide substrates.
These high quality drill bits for hardened steel are suitable for CNC machining centers and are widely used in mold making, automotive components, tooling, and precision parts manufacturing. Custom options for diameter, drilling depth, coating type, and shank design are available to meet specific machining requirements.
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. |
Drill bits for hardened steel are designed for drilling heat-treated steel materials with high hardness, typically ranging from HRC45 to HRC65. They are widely used in mold making, automotive components, tooling, and precision mechanical parts where standard drill bits cannot maintain cutting stability or tool life.
The best drill bits for hardened steel are usually made from carbide, especially solid carbide drill bits for hardened steel or tungsten carbide drill bits for hardened steel. These tools offer superior hardness, heat resistance, and wear resistance compared to HSS or cobalt drill bits, making them suitable for high-speed and continuous CNC machining.
Yes. Carbide drill bits for hardened steel significantly outperform HSS drill bits for hardened steel and cobalt alternatives when drilling high-hardness materials. Carbide tools maintain sharper cutting edges at elevated temperatures and provide longer tool life, especially in hardened steel above HRC45.
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.
HNCarbide drill bits for hardened steel are developed for complex and high-load drilling operations in hardened steel, tool steel, and alloy steel materials. They are widely used in mold manufacturing, automotive components, tooling, and general precision machining workshops where stable drilling performance is critical. From spot drilling and pilot holes to deep and continuous drilling, these tools maintain reliable cutting behavior even in materials with high hardness.
Compared with conventional metal drill bits for hardened steel, our carbide drill bits for hardened steel provide stronger cutting edges, improved chip evacuation, and reduced vibration during machining. This allows for cleaner hole walls, improved dimensional accuracy, and more predictable results in CNC machining centers. For customers evaluating what are the best drill bits for hardened steel, this series offers a balanced solution between efficiency, stability, and tool life.
Each series of drill bits for hardened steel is manufactured using carefully selected tungsten carbide substrates combined with advanced multi-axis CNC grinding technology. Precision-controlled point angles, margin widths, and flute profiles ensure consistent cutting geometry, enabling accurate positioning and smooth drilling even under high cutting speeds and elevated temperatures.
To further enhance durability, solid carbide drill bits for hardened steel and tungsten carbide drill bits for hardened steel can be equipped with wear-resistant coatings that improve heat resistance and reduce friction. These design features significantly extend tool life and support stable performance in batch production environments, positioning them among the high quality drill bits for hardened steel used for demanding industrial applications. Consistent quality control ensures repeatable performance from the first hole to the last.
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 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 Drill Bits For Hardened Steel.
Each of your Drill Bits For Hardened Steel will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s Drill Bits For Hardened Steel will be monitored on WALTER HELICHEEK andZOLLER 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 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.
Drill bits for hardened steel are designed for drilling heat-treated steel materials with high hardness, typically ranging from HRC45 to HRC65. They are widely used in mold making, automotive components, tooling, and precision mechanical parts where standard drill bits cannot maintain cutting stability or tool life.
The best drill bits for hardened steel are usually made from carbide, especially solid carbide drill bits for hardened steel or tungsten carbide drill bits for hardened steel. These tools offer superior hardness, heat resistance, and wear resistance compared to HSS or cobalt drill bits, making them suitable for high-speed and continuous CNC machining.
Yes. Carbide drill bits for hardened steel significantly outperform HSS drill bits for hardened steel and cobalt alternatives when drilling high-hardness materials. Carbide tools maintain sharper cutting edges at elevated temperatures and provide longer tool life, especially in hardened steel above HRC45.
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 biggest challenges in metalworking. High hardness, strong tensile strength, and elevated cutting temperatures place extreme demands on cutting tools. Selecting the right drill bits for hardened steel is essential to achieve accurate holes, stable machining, and acceptable tool life—especially in CNC environments.
This article explores what makes hardened steel difficult to drill, which drill bit materials perform best, and how to choose the most suitable drill bits for hardened steel for your specific application.
Hardened steel generally refers to steel materials that have undergone heat treatment to increase hardness and wear resistance. Common hardness levels range from HRC45 to HRC65, depending on the application. These materials are widely used in:
Mold and die manufacturing
Automotive components
Tooling and fixtures
Precision mechanical parts
Due to their hardness, conventional high-speed steel tools often fail prematurely. This is why specialized drill bits for hardened steel are required.
Drilling hardened steel introduces several technical challenges:
High cutting forces that increase tool wear
Excessive heat generation at the cutting edge
Poor chip evacuation in deep or continuous drilling
Risk of edge chipping or tool breakage
To overcome these issues, the best drill bits for hardened steel must combine strong substrate materials, optimized geometry, and proper coatings.
Carbide drill bits for hardened steel are the most widely used option in industrial machining. Made from tungsten carbide, they offer:
Extremely high hardness
Excellent heat resistance
Superior wear resistance compared to HSS
For CNC machining centers and high-speed applications, carbide is often considered the industry standard.
Solid carbide drill bits for hardened steel provide maximum rigidity and cutting stability. Because the entire tool is carbide, they are especially suitable for:
High-speed drilling
Deep-hole operations
Tight tolerance requirements
These tools are commonly chosen when consistency and tool life are critical.
Tungsten carbide drill bits for hardened steel are engineered for extreme conditions. Their fine-grain carbide structure allows them to maintain sharp cutting edges even at elevated temperatures, making them some of the strongest drill bits for hardened steel available for continuous production.
While HSS drill bits for hardened steel and cobalt-based tools can be used in lower hardness ranges or manual applications, they typically struggle above HRC45. For higher hardness levels, carbide solutions clearly outperform HSS in both efficiency and durability.
When evaluating what are the best drill bits for hardened steel, geometry plays a major role:
Point angle optimization improves penetration and reduces heat
Reinforced cutting edges minimize chipping
Optimized flute design enhances chip evacuation
Stable margins ensure accurate hole diameter
These features are essential for maintaining hole quality in hardened materials.
Advanced coatings significantly extend the life of high quality drill bits for hardened steel by reducing friction and heat buildup. Common benefits include:
Improved wear resistance
Higher oxidation temperature
Smoother chip flow
When paired with carbide substrates, coatings help drill bits perform reliably in high-speed and high-load conditions.
Coolant delivery is another important factor when selecting drill bits for hardened steel:
Internal coolant drill bits improve heat control and chip evacuation, ideal for deep-hole drilling
External coolant drill bits offer flexibility and cost efficiency for general applications
Choosing the right coolant configuration directly impacts tool life and hole quality.
High-performance drill bits for hardened steel are widely used in:
Mold cavities and core pins
Automotive transmission and engine components
Precision tooling and fixtures
Hardened steel plates and blocks
In these applications, tool reliability and consistency are often more important than initial tool cost.
When selecting the best carbide drill bits for hardened steel, consider the following:
Material hardness (HRC level)
Hole depth and diameter
CNC machine rigidity and speed
Coolant method
Required surface finish and tolerance
Balancing these factors helps ensure optimal drilling performance and reduced tool failure.
Choosing the right drill bits for hardened steel is critical for achieving efficient, accurate, and repeatable machining results. Compared to conventional options, carbide drill bits for hardened steel, solid carbide drill bits for hardened steel, and tungsten carbide drill bits for hardened steel offer superior strength, heat resistance, and durability.
By understanding material hardness, tool geometry, and application requirements, manufacturers can select the best drill bits for hardened steel to improve productivity, reduce downtime, and maintain consistent quality in demanding machining environments.
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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