Our long drill bit products are designed for stable, accurate drilling in steel, stainless steel, aluminum, and other metal materials, even at extended drilling depths.
With advanced CNC grinding, strict quality control, and premium carbide materials, each long drill bit delivers excellent chip evacuation, straightness, and tool life. The 10 mm long drill bit shown here represents our standard production capability, while a full range of diameters, lengths, and coatings is available.
As a professional China manufacturer, HNCarbide supports customized long drill bit designs, metric and inch sizes, and OEM solutions to match your machining requirements.
Our long drill bit is engineered for deep hole drilling applications where standard drill bits cannot reach. Designed with extended flute length and optimized geometry, this tool ensures stable drilling performance, precise hole straightness, and efficient chip evacuation.
The 10 mm long drill bit shown here is a typical size in our production range, widely used for drilling steel, stainless steel, aluminum, and other metal materials. Manufactured using advanced CNC grinding and premium carbide raw materials, each long drill bit offers excellent wear resistance and long tool life, even under demanding machining conditions.
HNCarbide long drill bit solutions are suitable for CNC machining centers, drilling machines, and automated production lines. Multiple diameters, lengths, coatings, and shank types are available to meet different 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 |
|---|---|---|---|---|
| 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 long drill bit is designed for drilling deep holes that standard drill bits cannot reach. It is commonly used in metalworking, mold manufacturing, automotive parts, construction, and woodworking applications where extended drilling depth and stable performance are required.
Compared with standard drills, a long drill bit offers better access to deep cavities while maintaining hole straightness and drilling accuracy.
A long drill bit for metal is suitable for drilling a wide range of materials, including carbon steel, stainless steel, aluminum alloys, cast iron, and other common engineering metals.
The 10 mm long drill bit is a popular choice for deep hole drilling in metal components due to its balanced rigidity, chip evacuation capability, and versatility in CNC machining.
To maximize the service life of a long drill bit, consider the following:
Use appropriate cutting speed and feed rate
Apply sufficient coolant or lubrication
Ensure stable clamping and minimal runout
Avoid excessive peck depth in deep drilling
These practices are especially important for a 10 mm long drill bit used in continuous metal drilling operations.
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 long drill bit is designed for deep hole drilling across a wide range of industrial applications, including general machining, mold manufacturing, automotive components, and metal fabrication.
The 10 mm long drill bit is widely used for drilling deep and straight holes in steel, stainless steel, aluminum, and other metal materials where extended reach and drilling stability are critical. Compared with standard drill tools, a long drill bit provides improved accessibility to deep cavities while maintaining hole accuracy and surface quality.
HNCarbide long drill bit solutions are suitable for CNC machining centers, drilling machines, and automated production lines, helping manufacturers increase efficiency and reduce secondary operations.
Each long drill bit is manufactured using premium carbide materials and advanced CNC grinding technology to ensure consistent dimensional accuracy and long tool life. Optimized cutting geometry and flute design allow smooth chip evacuation, even during deep drilling operations.
The 10 mm long drill bit shown here offers excellent rigidity and wear resistance, making it suitable for continuous machining and demanding metal drilling conditions. Strict quality control ensures reliable performance, stable tolerances, and consistent results from batch to batch.
We offer a complete range of long drill bit diameters, lengths, coatings, and customized solutions to meet different 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 Long 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 Long Drill Bit.
Each of your Long Drill Bit will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s Long 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 Long 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 long drill bit is designed for drilling deep holes that standard drill bits cannot reach. It is commonly used in metalworking, mold manufacturing, automotive parts, construction, and woodworking applications where extended drilling depth and stable performance are required.
Compared with standard drills, a long drill bit offers better access to deep cavities while maintaining hole straightness and drilling accuracy.
A long drill bit for metal is suitable for drilling a wide range of materials, including carbon steel, stainless steel, aluminum alloys, cast iron, and other common engineering metals.
The 10 mm long drill bit is a popular choice for deep hole drilling in metal components due to its balanced rigidity, chip evacuation capability, and versatility in CNC machining.
To maximize the service life of a long drill bit, consider the following:
Use appropriate cutting speed and feed rate
Apply sufficient coolant or lubrication
Ensure stable clamping and minimal runout
Avoid excessive peck depth in deep drilling
These practices are especially important for a 10 mm long drill bit used in continuous metal drilling operations.
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 modern machining and construction industries, deep hole drilling is a common but challenging operation. Standard drill bits often fail to meet the requirements of depth, straightness, and stability. This is where the long drill bit becomes an essential tool. Designed for extended reach and precision, the long drill bit is widely used in metalworking, woodworking, mold making, and industrial manufacturing.
This guide explains what a long drill bit is, how it works, its key advantages, and how to choose the right specification for your application.
A long drill bit is a drilling tool with an extended overall length and flute length compared to standard drill bits. This design allows it to drill deeper holes while maintaining accuracy and chip evacuation efficiency.
For example, a 10 mm long drill bit is commonly used when deep holes with medium diameters are required in metal components. Depending on the application, long drill bit designs can vary in material, coating, shank type, and cutting geometry.
Deep drilling presents challenges such as chip congestion, tool deflection, and heat buildup. A properly designed long drill bit addresses these issues effectively.
Extended reach for deep cavities and thick workpieces
Improved straightness and hole consistency
Optimized flute design for smooth chip evacuation
Reduced vibration during drilling operations
Compared to standard drills, a long drill bit offers more stable performance, especially in applications requiring depth-to-diameter ratios beyond conventional limits.
A long drill bit for metal is widely used in industries such as automotive manufacturing, aerospace components, mold and die making, and general CNC machining.
The 10 mm long drill bit is a popular choice for drilling deep holes in:
Steel
Stainless steel
Aluminum alloys
Cast iron
Advanced carbide materials and CNC grinding ensure that each long drill bit for metal provides excellent wear resistance and tool life, even under high cutting loads and continuous production conditions.
While commonly associated with metal machining, the long drill bit wood category is also important. A long drill bit for wood is often used in:
Furniture manufacturing
Timber construction
Door and frame installation
Deep dowel and cable channel drilling
Compared with metal drilling, woodworking applications focus more on clean hole walls and efficient chip removal. A properly selected long drill bit for wood ensures smooth drilling without tearing or burning.
Choosing the correct size is critical for performance and tool life. Common diameter options include:
1/8 long drill bit
1/4 long drill bit
3/8 long drill bit
1/2 long drill bit
10 mm long drill bit
12mm long drill bit
For deeper applications, extended lengths such as 12 inch long drill bit, 24 long drill bit, or even 36 long drill bit may be required. Each long drill bit should be matched with appropriate cutting parameters to ensure optimal results.
The performance of a long drill bit depends heavily on its material and manufacturing process. High-quality carbide, combined with precision CNC grinding, ensures:
Accurate diameter control
Consistent flute geometry
Stable cutting edges
Strict quality inspection guarantees that every long drill bit meets industrial standards and delivers repeatable performance across batches.
For workshops handling multiple drilling requirements, a long drill bit set or long drill bit sets offer flexibility and convenience. These sets typically include several diameters and lengths, allowing operators to switch quickly between tasks.
Single-size tools, such as a dedicated 10 mm long drill bit, are more suitable for mass production and repetitive operations where consistency is critical.
When choosing a long drill bit, consider the following factors:
Workpiece material (metal or wood)
Required hole depth and diameter
Machine type (CNC or manual)
Cutting speed and feed rate
Cooling and lubrication conditions
Matching these parameters ensures maximum efficiency and tool life from your long drill bit.
A long drill bit is an indispensable tool for deep hole drilling in modern manufacturing. Whether you need a long drill bit for metal, a long drill bit for wood, or a precise 10 mm long drill bit for industrial applications, choosing the right design and quality level makes a significant difference.
By understanding specifications, applications, and performance factors, manufacturers and machinists can achieve better drilling accuracy, higher productivity, and reduced tool costs with the right long drill bit solution.
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!
