Skip to content Extra long drill bits are designed for deep-hole drilling where precision and reach are critical. Engineered for stability and durability, our extra long drill bits deliver straight holes, reduced vibration, and extended tool life in demanding applications.
We supply extra long drill bits for metal, extra long drill bits for steel, and heavy-duty extra long drill bits industrial solutions suitable for fabrication, structural components, and precision machining. Manufactured with advanced CNC grinding and strict quality control, each drill ensures consistent performance in high-speed and high-load conditions.
Available in multiple diameters, coatings, and custom lengths, our extra long drill bits are ideal for professional and OEM requirements worldwide.
Extra long drill bits are engineered for deep hole drilling applications where standard-length drills cannot provide sufficient reach. Designed for strength and stability, our extra long drill bits ensure accurate alignment, reduced deflection, and smooth chip evacuation during extended drilling operations.
We supply high-performance extra long drill bits for metal and extra long drill bits for steel, suitable for structural fabrication, heavy components, and precision machining. Manufactured with advanced CNC grinding technology and strict dimensional control, each drill delivers consistent cutting performance and extended service life under demanding industrial conditions.
Available in multiple diameters, flute designs, coatings, and custom lengths, our extra long drill bits industrial range supports OEM and bulk supply requirements worldwide.
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). |
Extra long drill bits are designed for deep hole drilling applications where standard-length drills cannot provide sufficient reach. They are commonly used in structural steel fabrication, heavy machinery components, thick metal plates, timber framing, and construction projects. Extra long drill bits allow operators to drill deep and straight holes without repositioning the workpiece.
Industrial extra long drill bits are commonly manufactured from:
High Speed Steel (HSS)
Cobalt HSS for higher heat resistance
Solid carbide for high precision and wear resistance
Material selection depends on the application, machine capability, and production volume.
To minimize deflection when using extra long drill bits, consider:
Reducing feed rate
Using proper coolant
Ensuring stable workpiece clamping
Choosing reinforced core geometry
Using step drilling for very deep holes
Proper machine setup and correct tool selection significantly improve hole straightness.
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.
Extra long drill bits are widely used in applications requiring extended reach and stable deep drilling performance. Whether for structural components, thick metal sections, or confined assembly areas, our extra long drill bits provide reliable penetration and straight hole accuracy.
We offer extra long drill bits for metal and extra long drill bits for steel, engineered to maintain rigidity during long cutting depths. Compared with standard drills, the optimized flute design improves chip evacuation and reduces heat buildup, ensuring smoother drilling in demanding industrial environments.
Each extra long drill bits industrial solution is manufactured under strict quality control to guarantee dimensional accuracy and consistent cutting performance. Advanced CNC grinding ensures proper flute geometry and balanced rotation during deep drilling.
Designed for heavy-duty use, our extra long drill bits feature enhanced strength and wear resistance, extending tool life even under high-load conditions. Multiple diameters, coatings, and custom lengths are available to meet professional and OEM production requirements worldwide.
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 Extra Long Drill Bits 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 Extra Long Drill Bits.
Each of your Extra Long Drill Bits will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s Extra Long Drill Bits 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 Extra Long Drill Bits 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.
Extra long drill bits are designed for deep hole drilling applications where standard-length drills cannot provide sufficient reach. They are commonly used in structural steel fabrication, heavy machinery components, thick metal plates, timber framing, and construction projects. Extra long drill bits allow operators to drill deep and straight holes without repositioning the workpiece.
Industrial extra long drill bits are commonly manufactured from:
High Speed Steel (HSS)
Cobalt HSS for higher heat resistance
Solid carbide for high precision and wear resistance
Material selection depends on the application, machine capability, and production volume.
To minimize deflection when using extra long drill bits, consider:
Reducing feed rate
Using proper coolant
Ensuring stable workpiece clamping
Choosing reinforced core geometry
Using step drilling for very deep holes
Proper machine setup and correct tool selection significantly improve hole straightness.
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.
When standard drills cannot provide sufficient reach, extra long drill bits become essential. Designed for deep hole applications, these extended-length tools deliver precision, stability, and durability in demanding industrial environments. Whether used in structural fabrication, heavy equipment manufacturing, or precision machining, extra long drill bits ensure accurate alignment and consistent cutting performance.
In this guide, we explore how extra long drill bits work, their key applications, material options, and how to choose the right solution for your project.
Extra long drill bits are extended-length drilling tools engineered to reach deeper than standard or jobber-length drills. Their increased flute length and overall tool length allow operators to drill through thick materials or access recessed areas without repositioning the workpiece.
Unlike conventional drill bits, extra long drill bits must maintain rigidity over longer distances. Proper flute geometry, optimized core thickness, and precise grinding are critical to reducing deflection and ensuring straight hole accuracy.
Industrial-grade extra long drill bits are commonly manufactured in HSS or carbide materials, depending on the application and cutting conditions.
One of the most common applications is extra long drill bits for metal processing. In structural steel fabrication, machine building, and heavy component production, deep holes are often required in thick sections.
High-performance extra long drill bits for steel are designed to handle:
Structural beams
Thick steel plates
Alloy steel components
Welded assemblies
For metal drilling, tool rigidity and heat resistance are critical. Industrial extra long drill bits feature optimized flute design to improve chip evacuation and reduce heat buildup, minimizing the risk of tool breakage during deep drilling.
When drilling carbon steel or alloy steel, coatings such as TiN or TiAlN can further enhance wear resistance and extend tool life.
Although industrial applications often focus on metal, extra long drill bits for wood are widely used in construction and carpentry. These drills are ideal for:
Timber framing
Beam installation
Deep dowel holes
Cable routing through wooden structures
For masonry work, extra long drill bits for concrete are designed with reinforced tips to withstand impact drilling conditions. In construction projects where thick walls or reinforced concrete sections are involved, extended reach is essential.
Selecting the right geometry and material ensures optimal performance across different substrates.
Not all long drills are created equal. Extra long drill bits industrial grade tools are specifically engineered for professional and OEM applications. Compared to standard retail-grade products, industrial tools offer:
Superior dimensional accuracy
Better concentricity
Stronger core strength
Extended service life
Consistent batch-to-batch quality
For manufacturers operating in competitive markets such as extra long drill bits UK or extra long drill bits India, quality and reliability are critical factors. Industrial buyers prioritize performance, stability, and long-term cost efficiency over low initial price.
To achieve reliable deep drilling results, high-performance extra long drill bits include several technical advantages:
Improves chip evacuation and reduces clogging in deep holes.
Maintains rigidity and minimizes bending or deflection.
Ensures accurate diameter tolerance and stable rotation.
Enhances tool life when drilling steel and hard metals.
Supports OEM requirements for specialized applications.
These features directly impact hole straightness, surface finish, and overall machining efficiency.
Selecting the correct extra long drill bits depends on several factors:
Mild steel
Alloy steel
Stainless steel
Wood
Concrete
Longer drills require careful consideration of rigidity and chip evacuation.
Spindle speed, feed rate, and coolant supply all influence tool performance.
For high-volume production, industrial-grade extra long drill bits with coating are recommended.
Understanding these variables helps prevent premature wear and ensures optimal drilling efficiency.
Many industrial projects require non-standard specifications. Professional manufacturers offer:
Custom diameters
Extended flute lengths
Specialized coatings
Bulk production supply
For global buyers seeking reliable sourcing of extra long drill bits industrial, working directly with a manufacturer ensures better technical support and consistent quality control.
Extra long drill bits play a critical role in deep hole drilling across metal fabrication, steel processing, woodworking, and construction industries. From extra long drill bits for metal to heavy-duty extra long drill bits for steel, selecting the right tool ensures precision, durability, and operational efficiency.
For industrial applications, choosing high-quality extra long drill bits designed with optimized geometry and strict manufacturing standards can significantly improve productivity and reduce long-term tooling costs.
If your project requires custom lengths, industrial-grade materials, or OEM supply capability, investing in professional extra long drill bits is the key to reliable deep drilling performance.
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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