Skip to content Equip your workshop with our professional metric drill bit set, the ultimate solution for precision hole-making. As the best metric drill bit set for metal, our collection is engineered for industrial-grade durability and accuracy.
Choose between our heavy-duty cobalt metric drill bit set for heat-resistant drilling in stainless steel, or our versatile hss metric drill bit set for general-purpose tasks.
We cater to every technical requirement, offering the metric drill bit set 1mm increment for standard sizing and the highly specialized metric drill bit set .1mm increment for precision engineering.
Recognized as the best metric drill bit set on the market, each metric drill bit set for metal features optimized geometries to ensure smooth cutting and extended tool life. Experience the perfect balance of strength and precision with our premium tools.
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. |
A cobalt metric drill bit set is specifically engineered for high-heat and high-stress applications. While an hss metric drill bit set is excellent for general-purpose drilling in softer metals and wood, the addition of 5%-8% cobalt allows the bit to maintain its structural integrity at temperatures that would soften standard steel. This makes it the best metric drill bit set for metal fabrication involving stainless steel, titanium, and other hardened alloys where heat dissipation is critical.
While an hss metric drill bit set can drill through mild steel, it is not recommended for stainless steel as the material's work-hardening properties will quickly dull the bits. For stainless steel, we highly recommend our cobalt metric drill bit set. The superior "red hardness" of cobalt ensures the cutting edge remains sharp even under the extreme friction generated by tough, abrasive metals.
The best metric drill bit set should feature a 135-degree split point and be fully ground. A split point prevents the bit from "walking" on hard surfaces, which is vital for a metric drill bit set for metal. Furthermore, look for sets that offer comprehensive sizing, such as a metric drill bit set .1mm increment, to provide maximum flexibility for diverse industrial projects.
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 metric drill bit set series is widely utilized across automotive, aerospace, and general precision engineering workshops. From high-speed production lines to intricate mold and die manufacturing, these tools provide stable, chatter-free performance in tough materials.
As the best metric drill bit set for metal, it excels in tasks ranging from heavy-duty structural drilling to fine-detail machining. Our comprehensive range, including the metric drill bit set 1mm increment for standard maintenance and the metric drill bit set .1mm increment for high-tolerance CNC projects, ensures you have the right tool for any diameter. Whether you are working with stainless steel, aluminum, or cast iron, our metric drill bit set for metal delivers consistent results, helping you cover diverse machining requirements with a single, reliable tool family.
Each metric drill bit set is manufactured from premium materials using advanced CNC grinding centers to ensure razor-sharp cutting edges and precise geometries. Our portfolio includes the high-tenacity hss metric drill bit set for versatile shop use and the industry-leading cobalt metric drill bit set, designed to withstand extreme heat when drilling hardened alloys.
What makes this the best metric drill bit set is our commitment to durability; the optimized split-point design ensures self-centering and reduces thrust requirements. Each cobalt metric drill bit set undergoes strict ISO-based quality control to maintain diameter and runout within tight tolerances. By providing reliable size consistency from batch to batch, our tools maximize efficiency and minimize downtime in any high-precision metalworking environment.
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 Metric Drill Bit Set 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 Metric Drill Bit Set.
Each of your Metric Drill Bit Set will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s Metric Drill Bit Set 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 Metric Drill Bit Set 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.
A cobalt metric drill bit set is specifically engineered for high-heat and high-stress applications. While an hss metric drill bit set is excellent for general-purpose drilling in softer metals and wood, the addition of 5%-8% cobalt allows the bit to maintain its structural integrity at temperatures that would soften standard steel. This makes it the best metric drill bit set for metal fabrication involving stainless steel, titanium, and other hardened alloys where heat dissipation is critical.
While an hss metric drill bit set can drill through mild steel, it is not recommended for stainless steel as the material's work-hardening properties will quickly dull the bits. For stainless steel, we highly recommend our cobalt metric drill bit set. The superior "red hardness" of cobalt ensures the cutting edge remains sharp even under the extreme friction generated by tough, abrasive metals.
The best metric drill bit set should feature a 135-degree split point and be fully ground. A split point prevents the bit from "walking" on hard surfaces, which is vital for a metric drill bit set for metal. Furthermore, look for sets that offer comprehensive sizing, such as a metric drill bit set .1mm increment, to provide maximum flexibility for diverse industrial projects.
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.
In the world of precision engineering and metal fabrication, the quality of your holes is only as good as the tools you use. Whether you are operating a manual drill press or a high-end CNC machine, a high-quality metric drill bit set is an indispensable asset. However, with various materials, coatings, and increment sizes available, selecting the right set can be a daunting task.
In this comprehensive guide, we will explore why choosing the best metric drill bit set is crucial for your project's success and how to differentiate between HSS, Cobalt, and various precision increments.
When searching for a metric drill bit set for metal, the first decision you’ll face is the base material of the bits. The two industry standards are High-Speed Steel (HSS) and Cobalt.
A standard hss metric drill bit set is the workhorse of many workshops. High-speed steel is a carbon steel alloyed with elements like tungsten, molybdenum, and chromium. This combination allows the bits to withstand high temperatures without losing their hardness.
Best for: Mild steel, aluminum, wood, and plastics.
Pro Tip: If you are performing general-purpose maintenance or DIY projects, a quality HSS set offers the best balance between cost and performance.
For more demanding industrial applications, a cobalt metric drill bit set is the superior choice. These bits are typically made of HSS with 5% to 8% Cobalt added (often referred to as M35 or M42 grades). The addition of cobalt significantly increases the red hardness of the tool, meaning it can maintain its sharp cutting edge even when generating extreme friction heat.
If your work involves drilling through stainless steel, cast iron, or titanium, investing in a cobalt metric drill bit set will save you time and money by reducing tool breakage and frequent sharpening.
Not all projects require the same level of granularity. The spacing between bit sizes in your metric drill bit set can define the professional capability of your shop.
For most mechanical repairs and general fabrication, a metric drill bit set 1mm increment is sufficient. These sets typically cover a range from 1mm to 13mm or 1mm to 20mm. They are compact, easy to organize, and cover the most common bolt and fastener clearance sizes.
In precision engineering, aerospace, or mold-making, "close enough" isn't good enough. This is where the metric drill bit set .1mm increment becomes essential. Having bits that increase by just 0.1mm allows technicians to:
Achieve Exact Tolerances: Find the perfect fit for specialized pins or press-fit bearings.
Optimize Reaming Operations: Leave exactly the right amount of material for a final reaming pass.
Custom Hole Sizing: Tackle unique international standards without having to convert to fractional inches.
What separates an average tool from the best metric drill bit set for metal? It comes down to three technical factors:
The best metric drill bit set will almost always feature a 135-degree split point. Unlike the standard 118-degree point, a split point is self-centering. This means the bit won't "walk" or wander across the metal surface when you start drilling, ensuring your hole is exactly where you marked it.
Always look for a metric drill bit set that is "fully ground." This means the flutes are ground from a solid hardened bar rather than twisted. Fully ground bits offer superior dimensional accuracy and smoother chip evacuation, which is vital when working with sticky metals like aluminum or tough alloys.
While a raw hss metric drill bit set works well, coatings like Titanium Nitride (TiN) or Black Oxide can further reduce friction. For the ultimate performance, a cobalt metric drill bit set with a bronze finish provides natural lubricity and heat dissipation.
To ensure your best metric drill bit set lasts for years, follow these professional maintenance tips:
Use Cutting Fluid: Even the best metric drill bit set for metal needs lubrication to reduce heat and clear chips.
Control Your Speed: Cobalt bits thrive at lower speeds with higher pressure. Running your drill too fast is the quickest way to dull an expensive cobalt metric drill bit set.
Proper Storage: Avoid tossing bits into a loose drawer. Use a dedicated indexed case to protect the cutting edges from chipping each other.
Choosing the right tool is the first step toward professional-grade results. If you deal with standard repairs, an hss metric drill bit set in 1mm increments is a reliable starting point. However, if you are looking for the best metric drill bit set for industrial use, a cobalt metric drill bit set with .1mm increments offers the precision and heat resistance required for modern metalworking.
Investing in a high-quality metric drill bit set for metal is an investment in your productivity. By selecting the right material and the correct size increments, you ensure that every hole you drill is clean, accurate, and efficient.
With over 20 years of experience in the cutting tool industry, we specialize in manufacturing best drill bits for steel applications. Our products are engineered for high-precision drilling in steel plate, steel beams, and steel bolts, meeting the demanding requirements of industrial and professional users.
Through long-term cooperation with global customers and continuous participation in international trade fairs, we have developed a deep understanding of what are the best drill bits for steel in real machining environments. We provide stable OEM and ODM solutions, including customized geometries, coatings, and specifications, helping customers achieve reliable drilling performance across different steel and metal 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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