Our 10 mm drill bit is designed for accurate hole making in steel, stainless steel, aluminum, cast iron, and titanium alloys, delivering stable performance, excellent chip evacuation, and long tool life.
For international users, the 10 mm drill bit in inches is equivalent to 0.3937 inch, making it easy to convert a 10 mm drill bit to inches or compare the 10 mm drill bit equivalent in standard inch sizes. Each 10 mm drill bit size is produced under strict quality control to ensure consistent diameter, straightness, and cutting reliability.
As a professional carbide drill manufacturer, HNCarbide supports 10 mm drill bit conversion needs, including 10 mm drill bit in fraction and 10 mm drill bit in standard references, as well as customized lengths, coatings, and shank types to match different machining requirements.
The 10 mm drill bit is a high-precision cutting tool designed for stable and accurate drilling in steel, stainless steel, aluminum, cast iron, and alloy materials. Manufactured from premium carbide, this 10 mm drill bit size offers excellent wear resistance, heat stability, and extended tool life in CNC and conventional drilling operations.
The optimized flute geometry of the 10 mm drill bit ensures smooth chip evacuation, reduced vibration, and consistent hole quality, even under high-speed machining conditions. Tight dimensional tolerances guarantee reliable performance and precise diameter control in demanding industrial applications.
Each 10 mm drill bit is produced under strict quality standards and can be supplied with different coatings, flute lengths, and shank options. For reference, the 10 mm drill bit in inches is commonly used as an equivalent size in international machining environments.
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 |
|---|---|---|---|---|
| ALCRN | Al: 18–32% Cr: 10–25% N: 45–57% | Hardness: 2800–3200 HV (≈30–32 GPa) Thickness: 1–5 μm (typically 3–4 μm in applications) Oxidation temperature: 1000–1100°C (short-term up to 1100°C) Deposition temperature: ＜500°C (suitable for HSS and carbide substrates) | Red hardness: maintains hardness even at 1100°C, better than TiAlN (whose hardness drops above about 900°C). Adhesion: critical load up to 40 N (with optimized process). Wear resistance: suitable for high-speed cutting and dry machining, especially effective on stainless steels and alloy steels. | Cutting tools: end mills, gear cutters, drills (e.g. Balinit Alcorna series). Moulds: aluminium die-casting moulds, stamping tools. Industrial parts: piston rings, high-temperature wear-resistant parts (combined with suitable interlayer design). |
A 10 mm drill bit is commonly used for producing accurate mounting holes, clearance holes, and pilot holes in mechanical parts. It is suitable for CNC machining centers, drilling machines, and production lines where repeatable hole quality and positional accuracy are required.
Premature wear of a 10 mm drill bit is often caused by incorrect cutting parameters, insufficient coolant, poor chip evacuation, or unsuitable tool material for the workpiece. Improper alignment and excessive feed rates can also lead to edge chipping or breakage.
When selecting a 10 mm drill bit for CNC use, factors such as workpiece material, hole depth, machine rigidity, and production volume should be considered. Choosing the correct geometry and coating ensures stable and repeatable drilling performance.
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.
The 10 mm drill bit is designed for a wide range of industrial drilling applications, including CNC machining centers, general engineering workshops, and production lines. It is suitable for drilling accurate and repeatable holes in steel, stainless steel, aluminum, cast iron, and various alloy materials.
From standard through-hole drilling to blind-hole and precision positioning operations, the 10 mm drill bit delivers stable cutting performance and reliable hole quality. Its balanced geometry helps reduce vibration and tool deflection, making the 10 mm drill bit size a practical choice for both small-batch machining and high-volume production environments. As a commonly used metric size, the 10 mm drill bit is widely accepted across international machining standards.
Each 10 mm drill bit is manufactured from premium carbide and precision-ground to achieve excellent dimensional accuracy and surface finish. The optimized cutting edge and flute design improve chip evacuation while minimizing cutting forces, allowing smoother drilling and longer tool life.
Strict quality control is applied to diameter tolerance, concentricity, and edge consistency, ensuring reliable performance in demanding machining conditions. The robust structure of the 10 mm drill bit supports stable operation at higher spindle speeds and feeds, making it suitable for continuous use in industrial applications where precision and durability are critical.
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 10 mm Drill Bit 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 10 mm Drill Bit.
Each of your 10 mm Drill Bit will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s 10 mm Drill Bit 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 10 mm Drill Bit 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 10 mm drill bit is commonly used for producing accurate mounting holes, clearance holes, and pilot holes in mechanical parts. It is suitable for CNC machining centers, drilling machines, and production lines where repeatable hole quality and positional accuracy are required.
Premature wear of a 10 mm drill bit is often caused by incorrect cutting parameters, insufficient coolant, poor chip evacuation, or unsuitable tool material for the workpiece. Improper alignment and excessive feed rates can also lead to edge chipping or breakage.
When selecting a 10 mm drill bit for CNC use, factors such as workpiece material, hole depth, machine rigidity, and production volume should be considered. Choosing the correct geometry and coating ensures stable and repeatable drilling performance.
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.
The 10 mm drill bit is one of the most commonly used metric drilling tools in industrial machining, metal fabrication, and general engineering. Whether you are working in a CNC machining center or a conventional workshop, understanding the 10 mm drill bit size, its applications, and its equivalent in other standards helps ensure accurate hole production and reliable machining results.
This article provides a clear and practical overview of what a 10 mm drill bit is, where it is used, and how it compares with inch-based standards commonly used in international markets.
A frequent question from machinists and buyers is: what size is a 10 mm drill bit?
In metric terms, the answer is straightforward—the cutting diameter is exactly 10 millimeters.
For users working with imperial systems, it is also important to understand what size is a 10 mm drill bit in inches. The 10 mm drill bit in inches equals 0.3937 inch. This value is often referenced when selecting the closest imperial drill size or when machines and drawings use inch-based standards.
Because there is no exact fractional inch equivalent, the 10 mm drill bit equivalent is usually considered close to a 25/64 inch drill bit, though the metric size remains more precise for tolerance-critical applications.
Understanding 10 mm drill bit conversion is especially important in international machining environments where metric and imperial tools are used together. Engineers often need to convert 10 mm drill bit to inches when selecting tooling or comparing specifications.
Although some users search for a 10 mm drill bit to fraction, it is important to note that fractional sizes are approximations. A 10 mm drill bit in standard metric systems provides higher dimensional accuracy than fractional substitutes, especially in precision machining.
For this reason, professional manufacturers and CNC operators typically recommend using the exact 10 mm drill bit size rather than relying on fractional equivalents whenever possible.
The 10 mm drill bit is widely used across many industries due to its versatile size and balanced cutting performance. Common applications include:
Drilling through-holes and blind holes in steel and stainless steel
Machining aluminum and non-ferrous alloys
Producing accurate mounting and clearance holes
Pre-drilling operations before tapping or reaming
In CNC machining, the 10 mm drill bit is frequently used for structural components, brackets, plates, and machine parts where consistent hole diameter and surface finish are required.
Thanks to its moderate diameter, the 10 mm drill bit offers a good balance between rigidity and cutting efficiency, making it suitable for both small-batch jobs and high-volume production.
A high-quality 10 mm drill bit can be applied to a wide range of materials when matched with the correct cutting parameters. These materials typically include:
Carbon steel
Stainless steel
Aluminum alloys
Cast iron
Tool steel and alloy steel
The performance of a 10 mm drill bit depends heavily on its material grade, cutting geometry, and surface coating. Carbide versions offer excellent wear resistance and thermal stability, while high-speed steel options provide flexibility and cost efficiency for lighter-duty applications.
The 10 mm drill bit in standard metric systems is widely accepted because it fits many engineering designs and international specifications. Designers often select 10 mm holes for fasteners, dowels, and alignment features, making the 10 mm drill bit a staple tool in workshops worldwide.
Compared with smaller diameters, the 10 mm drill bit size provides improved rigidity and reduced deflection, contributing to better hole straightness and longer tool life under demanding conditions.
When selecting a 10 mm drill bit, consider the following factors:
Workpiece material
Required hole tolerance
Machine type (CNC or conventional)
Cutting speed and feed rate
Tool coating and flute design
Choosing the correct 10 mm drill bit ensures stable cutting, reduced tool wear, and consistent machining results. For precision-critical projects, using a metric drill rather than a converted imperial size is always recommended.
What is a 10 mm drill bit in inches?
A 10 mm drill bit in inches measures approximately 0.3937 inch.
What size is a 10 mm drill bit equivalent to?
The closest fractional equivalent is 25/64 inch, though it is not an exact match.
Is a 10 mm drill bit considered a standard size?
Yes, the 10 mm drill bit is a widely used standard size in metric machining systems.
Should I use a fractional drill instead of a 10 mm drill bit?
For high-precision work, using the exact 10 mm drill bit size is recommended over fractional equivalents.
The 10 mm drill bit remains one of the most practical and widely used drilling tools in modern machining. By understanding its size, applications, and standard references, users can make better tooling decisions and achieve more accurate, consistent results in their machining operations.
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!
