Skip to content ALCRN-coated 1 8 drill bits with coolant holes are engineered for high-performance drilling in demanding machining applications. Manufactured from premium solid carbide, these 1 8 drill bits provide excellent heat resistance, superior wear protection, and consistent hole quality, even under high-speed and high-feed conditions.
The advanced AlCrN coating significantly improves tool life by reducing friction and oxidation at elevated temperatures. Combined with precision-engineered internal coolant holes, these 1 8 solid carbide drill bits ensure efficient chip evacuation, stable cutting performance, and enhanced cooling directly at the cutting edge.
Designed with a standard 1 8 shank, these drill bits are compatible with a wide range of CNC machines and tool holders. Compared with conventional 1 8 inch drill bits, the coolant-through design allows for deeper drilling, improved surface finish, and reduced risk of tool breakage.
3D
EDP No. | Fractional | Metric (D1, mm) | Flute Length L1 (mm) | Shank Diameter D2 (mm) | Overall Length L2 (mm) |
DB310008 | 1/8 | 3.175 | 20 | 6 | 66 |
5D
EDP No. | Fractional | Metric (D1, mm) | Flute Length L1 (mm) | Shank Diameter D2 (mm) | Overall Length L2 (mm) |
DB510008 | 1/8 | 3.175 | 28 | 6 | 66 |
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). |
Our 1 8 Drill Bits drawings clearly show key 1 8 Drill Bits dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right 1 8 Drill Bits sizes for your CNC setup and machining depth before ordering.
1 8 drill bits are widely used for precision drilling in CNC machining, metalworking, electronics, mold making, and construction applications. Due to their small diameter, 1 8 inch drill bits are ideal for pilot holes, fine-detail drilling, and applications requiring high dimensional accuracy.
High-quality 1 8 drill bits can be used on a wide range of materials, including:
Steel and stainless steel
Aluminum and non-ferrous metals
Cast iron and alloy steel
Ceramics and porcelain (with specialized designs)
Concrete and masonry (using 1 8 masonry drill bits)
Choosing the correct tool geometry and coating is essential for optimal performance.
Drill bits with 1 8 shank are designed for compatibility with standard collets, tool holders, and CNC spindles. Using 1 8 shank drill bits ensures stable clamping, reduced runout, and consistent hole quality, especially in high-speed machining.
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.
ALCRN-coated 1 8 drill bits without coolant holes are designed for stable and precise drilling in dry or external-coolant machining environments. Made from premium solid carbide, these 1 8 drill bits offer excellent rigidity, wear resistance, and consistent performance across a wide range of general and high-speed drilling applications.
The advanced AlCrN coating provides superior heat resistance and oxidation protection, allowing these 1 8 solid carbide drill bits to maintain cutting edge sharpness and dimensional accuracy under elevated cutting temperatures. Without internal coolant holes, the tool structure remains stronger and more rigid, making it ideal for shallow to medium-depth drilling.
Featuring a standard 1 8 shank, these drill bits are fully compatible with common CNC drilling machines and tool holders. Compared to conventional uncoated 1 8 inch drill bits, the AlCrN-coated design delivers longer tool life, improved surface finish, and reduced tool wear.
3D
EDP No. | Fractional | Metric (D1, mm) | Flute Length L1 (mm) | Shank Diameter D2 (mm) | Overall Length L2 (mm) |
DB301008 | 1/8 | 3.175 | 20 | 6 | 66 |
5D
EDP No. | Fractional | Metric (D1, mm) | Flute Length L1 (mm) | Shank Diameter D2 (mm) | Overall Length L2 (mm) |
DB501008 | 1/8 | 3.175 | 28 | 6 | 66 |
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). |
Our 1 8 Drill Bits drawings clearly show key 1 8 Drill Bits dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right 1 8 Drill Bits sizes for your CNC setup and machining depth before ordering.
1 8 drill bits are widely used for precision drilling in CNC machining, metalworking, electronics, mold making, and construction applications. Due to their small diameter, 1 8 inch drill bits are ideal for pilot holes, fine-detail drilling, and applications requiring high dimensional accuracy.
High-quality 1 8 drill bits can be used on a wide range of materials, including:
Steel and stainless steel
Aluminum and non-ferrous metals
Cast iron and alloy steel
Ceramics and porcelain (with specialized designs)
Concrete and masonry (using 1 8 masonry drill bits)
Choosing the correct tool geometry and coating is essential for optimal performance.
Drill bits with 1 8 shank are designed for compatibility with standard collets, tool holders, and CNC spindles. Using 1 8 shank drill bits ensures stable clamping, reduced runout, and consistent hole quality, especially in high-speed machining.
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 1 8 drill bits are widely used in precision drilling applications across automotive, mold making, electronics, and general metalworking industries. Designed for accuracy and reliability, these 1 8 drill bits perform consistently in materials such as steel, stainless steel, aluminum, ceramics, and masonry.
From standard drilling to high-speed CNC operations, our range includes 1 8 inch drill bits, double ended 1 8 drill bits, and application-specific solutions such as 1 8 porcelain drill bits and 1 8 masonry drill bits. Compared with conventional drill bits, HNCarbide tools offer improved hole quality, reduced tool wear, and longer service life, helping manufacturers achieve higher productivity and stable machining results.
Each 1 8 drill bits is manufactured from premium-grade carbide and ground using advanced CNC equipment to ensure excellent dimensional accuracy and cutting-edge consistency. Optimized flute geometry and precise edge preparation allow smooth chip evacuation and stable cutting performance, even at higher spindle speeds.
Available as 1 8 solid carbide drill bits with standard 1 8 shank, our products deliver superior rigidity and wear resistance compared to traditional 1 8 jobber drill bits. Strict quality control and batch-to-batch consistency ensure reliable performance in both small-batch and high-volume production environments.
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 1 8 Drill Bits Needs
We Only Use unground tungsten carbide rods with HlP sintering and 100% 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 1 8 Drill Bits.
Each of your tungsten 1 8 Drill Bits will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s 1 8 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 1 8 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.
1 8 drill bits are widely used for precision drilling in CNC machining, metalworking, electronics, mold making, and construction applications. Due to their small diameter, 1 8 inch drill bits are ideal for pilot holes, fine-detail drilling, and applications requiring high dimensional accuracy.
High-quality 1 8 drill bits can be used on a wide range of materials, including:
Steel and stainless steel
Aluminum and non-ferrous metals
Cast iron and alloy steel
Ceramics and porcelain (with specialized designs)
Concrete and masonry (using 1 8 masonry drill bits)
Choosing the correct tool geometry and coating is essential for optimal performance.
Drill bits with 1 8 shank are designed for compatibility with standard collets, tool holders, and CNC spindles. Using 1 8 shank drill bits ensures stable clamping, reduced runout, and consistent hole quality, especially in high-speed machining.
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 it comes to precision drilling in CNC machining and industrial manufacturing, 1 8 drill bits are among the most commonly used and versatile tool sizes. Their compact diameter makes them ideal for fine holes, pilot drilling, and high-accuracy applications across a wide range of materials.
In this guide, we will explore the different types of 1 8 drill bits, their applications, material compatibility, and how to select the right option for your machining needs.
1 8 drill bits refer to drill bits with a nominal diameter of 1/8 inch, widely used in both manual and CNC drilling operations. Compared to larger diameters, 1 8 inch drill bits allow for higher precision, tighter tolerances, and cleaner hole finishes, especially in thin materials or detailed components.
Most industrial 1 8 drill bits are available with a standard 1 8 shank, making them compatible with common collets, tool holders, and CNC spindles.
Choosing the correct type of 1 8 drill bits depends heavily on the application and workpiece material. Below are the most common categories used in industrial machining.
1 8 solid carbide drill bits are designed for high-speed and high-precision drilling. Compared with high-speed steel tools, carbide drill bits offer higher rigidity, better wear resistance, and longer tool life.
They are widely used for drilling:
Steel and stainless steel
Cast iron
Hardened alloys
Non-ferrous metals
Solid carbide 1 8 drill bits are especially suitable for CNC machines where consistent performance and dimensional accuracy are critical.
Double ended 1 8 drill bits feature cutting edges on both ends, allowing users to rotate the tool when one end becomes worn. This design helps reduce tooling costs and downtime.
Also known as 1 8 double ended drill bits, they are commonly used for:
Production drilling
Short-hole applications
Cost-sensitive machining environments
Their balanced design ensures stable cutting performance while extending overall tool usability.
1 8 jobber drill bits are characterized by their standard length and general-purpose design. They are suitable for a wide range of drilling tasks and are often used in workshops and light industrial applications.
While jobber drill bits are versatile, they typically offer lower rigidity compared to solid carbide 1 8 drill bits, making them more suitable for moderate cutting conditions.
Different materials require different cutting geometries and coatings. Specialized 1 8 drill bits are engineered to meet these needs.
1 8 porcelain drill bits and 1 8 porcelain tile drill bits are designed for brittle materials where chipping and cracking must be minimized. These drill bits often feature specialized tips or diamond coatings to ensure clean holes without damaging the surface.
They are commonly used in:
Ceramic tiles
Porcelain slabs
Glass-based materials
1 8 masonry drill bits are optimized for drilling into concrete, brick, and stone. Their reinforced cutting edges and aggressive flute designs help handle abrasive materials while maintaining drilling efficiency.
For hard and brittle materials, 1 8 inch diamond core drill bits provide excellent cutting performance. Diamond-coated tools offer superior durability and precision when drilling ceramics, composites, and glass.
Most industrial drilling tools use standardized shank sizes. Drill bits with 1 8 shank are widely compatible with CNC tool holders, quick-change systems, and precision collets.
Using 1 8 shank drill bits ensures:
Easy tool replacement
Stable clamping
Reduced runout
This is especially important in high-speed CNC machining, where tool balance directly affects hole quality.
Modern 1 8 drill bits often feature advanced coatings such as AlCrN, TiAlN, or AlTiN. These coatings:
Reduce friction
Improve heat resistance
Extend tool life
Coated 1 8 solid carbide drill bits perform particularly well in dry cutting or high-temperature environments, making them ideal for demanding industrial applications.
When selecting 1 8 drill bits, consider the following factors:
Material to be drilled – Metal, ceramic, masonry, or composite
Machine type – CNC machining center or manual drilling
Tool material – Carbide vs. jobber drill bits
Hole depth – Standard or deep drilling
Cost efficiency – Single-ended vs. double ended 1 8 drill bits
Matching the drill bit design to your specific application will significantly improve productivity and machining stability.
High-quality 1 8 drill bits deliver consistent hole accuracy, longer tool life, and reduced machine downtime. Poor-quality tools often result in premature wear, tool breakage, and inconsistent hole finishes.
For industrial users, investing in precision-manufactured 1 8 drill bits with strict quality control ensures reliable performance across both small-batch and high-volume production.
1 8 drill bits play a critical role in precision drilling across numerous industries, from metalworking and electronics to construction and ceramics. With options such as 1 8 solid carbide drill bits, double ended 1 8 drill bits, and application-specific designs like 1 8 porcelain drill bits and 1 8 masonry drill bits, choosing the right tool can significantly improve machining efficiency and product quality.
By understanding tool types, coatings, and application requirements, manufacturers and machining professionals can make informed decisions and achieve optimal drilling results.
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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