HNCarbide Internal Coolant Twist Drill with TiXCo₃ coating is designed for stable, high-speed metal machining where tool life and hole quality are critical. This solid carbide twist drill features internal coolant channels that deliver efficient chip evacuation and lower cutting temperatures, making it ideal as a twist drill for stainless steel, cast iron and alloy steels. The advanced TiXCo₃ coating provides excellent wear resistance and heat stability, extending tool life in continuous production.
As a high-performance tungsten carbide twist drill for metal machining, it is well-suited for demanding applications in the automotive industry, aerospace industry and precision component manufacturing. When you need consistent tolerance, clean hole surfaces and reduced downtime, HNCarbide’s internal coolant twist drill bits give you a reliable solution for modern CNC production.
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. |
OurTwist Drill drawings clearly show key Twist Drill dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right Twist Drill sizes for your CNC setup and machining depth before ordering.
A twist drill is a rotary cutting tool with helical flutes that guide chips out of the hole while drilling. HNCarbide twist drill bits are designed for accurate hole making in metal and other engineering materials, combining optimized flute geometry with wear-resistant coatings for stable performance in production.
A twist drill bit is used for drilling precise round holes in materials such as alloy steel, stainless steel, cast iron, aluminum and other non-ferrous metals. Our twist drill for metal machining is widely used in CNC machining centers and automatic production lines in the automotive, aerospace and general engineering industries.
HSS twist drill / high speed steel twist drill: Good toughness, economical, ideal for general machining and small to medium batch production.
HSS M42 cobalt twist drill: Higher hot hardness and red-hardness, suitable for tougher steels and higher cutting speeds.
Solid carbide twist drill / carbide twist drill bits: Very high hardness and wear resistance, best for high-precision, high-speed drilling and long production runs in hardened steel and cast iron.
For general steels and non-ferrous metals, HSS twist drill bits and high speed steel twist drill bits offer a good balance of toughness and cost. For hard alloys or abrasive materials, carbide twist drill and tungsten carbide twist drill bits provide higher hardness and longer tool life. For difficult materials like stainless steel and cast iron, we recommend coated solid carbide twist drill solutions with internal or external coolant.
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.
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 |
|---|---|---|---|---|
| ALCRONA (AlCrN) | Aluminium–chromium nitride (AlCrN) PVD coating, titanium-free; dense, fine-grained structure with high Al/Cr ratio to improve hot hardness and oxidation resistance. Typically deposited as a multi-layer or graded layer on solid carbide or HSS substrates. | Hardness: approx. 2800–3200 HV (nano-indentation). Coefficient of friction: ~0.3–0.35 in dry steel cutting. Heat resistance: stable at elevated temperatures, operating temperature up to about 1,000–1,100 °C with excellent hot hardness and oxidation resistance. High adhesion strength to tool substrate; low tendency to micro-chipping at the cutting edge. | Dark grey to blue-grey appearance. Titanium-free universal high-performance coating for heavy mechanical loads and high cutting speeds. Very high wear resistance under both low-speed / high-load and high-speed / dry-cut conditions. Good performance in dry or minimum-lubrication drilling, maintaining sharp cutting edges and consistent hole quality over long tool life. | Recommended workpiece materials: alloy and carbon steels, pre-hardened and hardened steels, cast irons and high-tensile structural steels. Especially suitable for high-performance carbide or HSS drills used in dry or semi-dry machining. Typical application fields: automotive power-train parts, mould & die holes, general engineering components and high-speed production drilling where long tool life and thermal stability are critical. |
Our Twist Drill drawings clearly show key Twist Drill dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right Twist Drill sizes for your CNC setup and machining depth before ordering.
A twist drill is a rotary cutting tool with helical flutes that guide chips out of the hole while drilling. HNCarbide twist drill bits are designed for accurate hole making in metal and other engineering materials, combining optimized flute geometry with wear-resistant coatings for stable performance in production.
A twist drill bit is used for drilling precise round holes in materials such as alloy steel, stainless steel, cast iron, aluminum and other non-ferrous metals. Our twist drill for metal machining is widely used in CNC machining centers and automatic production lines in the automotive, aerospace and general engineering industries.
HSS twist drill / high speed steel twist drill: Good toughness, economical, ideal for general machining and small to medium batch production.
HSS M42 cobalt twist drill: Higher hot hardness and red-hardness, suitable for tougher steels and higher cutting speeds.
Solid carbide twist drill / carbide twist drill bits: Very high hardness and wear resistance, best for high-precision, high-speed drilling and long production runs in hardened steel and cast iron.
For general steels and non-ferrous metals, HSS twist drill bits and high speed steel twist drill bits offer a good balance of toughness and cost. For hard alloys or abrasive materials, carbide twist drill and tungsten carbide twist drill bits provide higher hardness and longer tool life. For difficult materials like stainless steel and cast iron, we recommend coated solid carbide twist drill solutions with internal or external coolant.
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 External Coolant Twist Drill with TiXCo₃ coating is designed for stable, high-efficiency metal cutting in demanding production environments. This premium solid carbide twist drill works with external coolant supply to reduce cutting temperature and improve chip evacuation, making it an excellent twist drill for metal, including alloy steel, stainless steel and cast iron.
The advanced TiXCo₃ coating provides outstanding wear resistance and heat stability, allowing the carbide twist drill bits to maintain sharp cutting edges and consistent hole quality over long runs. As a high-performance tungsten carbide twist drill for metal machining in the automotive, aerospace and general engineering sectors, HNCarbide’s external coolant twist drill helps you achieve precise holes, longer tool life and reduced downtime.
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. |
Our Twist Drill drawings clearly show key Twist Drill dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right Twist Drill sizes for your CNC setup and machining depth before ordering.
A twist drill is a rotary cutting tool with helical flutes that guide chips out of the hole while drilling. HNCarbide twist drill bits are designed for accurate hole making in metal and other engineering materials, combining optimized flute geometry with wear-resistant coatings for stable performance in production.
A twist drill bit is used for drilling precise round holes in materials such as alloy steel, stainless steel, cast iron, aluminum and other non-ferrous metals. Our twist drill for metal machining is widely used in CNC machining centers and automatic production lines in the automotive, aerospace and general engineering industries.
HSS twist drill / high speed steel twist drill: Good toughness, economical, ideal for general machining and small to medium batch production.
HSS M42 cobalt twist drill: Higher hot hardness and red-hardness, suitable for tougher steels and higher cutting speeds.
Solid carbide twist drill / carbide twist drill bits: Very high hardness and wear resistance, best for high-precision, high-speed drilling and long production runs in hardened steel and cast iron.
For general steels and non-ferrous metals, HSS twist drill bits and high speed steel twist drill bits offer a good balance of toughness and cost. For hard alloys or abrasive materials, carbide twist drill and tungsten carbide twist drill bits provide higher hardness and longer tool life. For difficult materials like stainless steel and cast iron, we recommend coated solid carbide twist drill solutions with internal or external coolant.
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 External Coolant Twist Drill with ALCRONA coating is engineered for high-precision, high-stability metal drilling where heat control and durability are essential. Using external coolant delivery, this solid carbide twist drill effectively reduces cutting temperature and enhances chip evacuation, making it ideal as a twist drill for metal, including stainless steel, alloy steel and cast iron.
The advanced ALCRONA coating increases surface hardness, oxidation resistance and thermal stability, allowing our carbide twist drill bits to maintain sharp cutting edges even under high-speed or continuous production conditions. As a reliable tungsten carbide twist drill for demanding applications across the automotive, aerospace and oil & gas industries, it ensures consistent hole accuracy, long tool life and minimal downtime.
When you need dependable performance and excellent wear resistance, HNCarbide’s external coolant twist drill with ALCRONA coating delivers superior results for modern CNC machining.
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 |
|---|---|---|---|---|
| ALCRONA (AlCrN) | Aluminium–chromium nitride (AlCrN) PVD coating, titanium-free; dense, fine-grained structure with high Al/Cr ratio to improve hot hardness and oxidation resistance. Typically deposited as a multi-layer or graded layer on solid carbide or HSS substrates. | Hardness: approx. 2800–3200 HV (nano-indentation). Coefficient of friction: ~0.3–0.35 in dry steel cutting. Heat resistance: stable at elevated temperatures, operating temperature up to about 1,000–1,100 °C with excellent hot hardness and oxidation resistance. High adhesion strength to tool substrate; low tendency to micro-chipping at the cutting edge. | Dark grey to blue-grey appearance. Titanium-free universal high-performance coating for heavy mechanical loads and high cutting speeds. Very high wear resistance under both low-speed / high-load and high-speed / dry-cut conditions. Good performance in dry or minimum-lubrication drilling, maintaining sharp cutting edges and consistent hole quality over long tool life. | Recommended workpiece materials: alloy and carbon steels, pre-hardened and hardened steels, cast irons and high-tensile structural steels. Especially suitable for high-performance carbide or HSS drills used in dry or semi-dry machining. Typical application fields: automotive power-train parts, mould & die holes, general engineering components and high-speed production drilling where long tool life and thermal stability are critical. |
Our Twist Drill drawings clearly show key Twist Drill dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right Twist Drill sizes for your CNC setup and machining depth before ordering.
A twist drill is a rotary cutting tool with helical flutes that guide chips out of the hole while drilling. HNCarbide twist drill bits are designed for accurate hole making in metal and other engineering materials, combining optimized flute geometry with wear-resistant coatings for stable performance in production.
A twist drill bit is used for drilling precise round holes in materials such as alloy steel, stainless steel, cast iron, aluminum and other non-ferrous metals. Our twist drill for metal machining is widely used in CNC machining centers and automatic production lines in the automotive, aerospace and general engineering industries.
HSS twist drill / high speed steel twist drill: Good toughness, economical, ideal for general machining and small to medium batch production.
HSS M42 cobalt twist drill: Higher hot hardness and red-hardness, suitable for tougher steels and higher cutting speeds.
Solid carbide twist drill / carbide twist drill bits: Very high hardness and wear resistance, best for high-precision, high-speed drilling and long production runs in hardened steel and cast iron.
For general steels and non-ferrous metals, HSS twist drill bits and high speed steel twist drill bits offer a good balance of toughness and cost. For hard alloys or abrasive materials, carbide twist drill and tungsten carbide twist drill bits provide higher hardness and longer tool life. For difficult materials like stainless steel and cast iron, we recommend coated solid carbide twist drill solutions with internal or external coolant.
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 twist drill solutions are used across demanding metalworking fields, from general engineering and precision machining to the automotive industry, aerospace industry and oil & gas industry. Our twist drill bits are optimized as a twist drill for metal machining, covering alloy steel, stainless steel, cast iron and non-ferrous materials.
With specialized designs such as twist drill for stainless steel, twist drill for cast iron and twist drill for metal, you can standardize on one reliable supplier while still matching different machines, materials and production volumes. Whether you need high-speed drilling on CNC lines or stable performance on conventional machines, HNCarbide twist drill bits help you maintain consistent hole quality and productivity across your entire workshop.
Each HNCarbide twist drill is engineered from carefully selected materials including hss twist drill, cobalt twist drill and solid carbide twist drill options to match different hardness ranges and cutting conditions. Advanced grinding technology ensures accurate twist drill sizes, consistent twist drill bit sizes and optimized flute form for smooth chip evacuation.
Our portfolio includes jobber twist drill, straight shank twist drill and taper shank twist drill, as well as premium tungsten carbide twist drill bits for high-precision, high-speed machining. Tight tolerances, balanced geometry and stable coatings give our twist drill bits long tool life and repeatable performance from batch to batch, making HNCarbide a dependable choice for critical production lines.
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 Twist Drill 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 Twist Drill.
Each of your tungsten Twist Drill will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s Twist Drill will be monitored on WALTER HELICHEEK andZOLLER 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 Twist Drill 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 twist drill is a rotary cutting tool with helical flutes that guide chips out of the hole while drilling. HNCarbide twist drill bits are designed for accurate hole making in metal and other engineering materials, combining optimized flute geometry with wear-resistant coatings for stable performance in production.
A twist drill bit is used for drilling precise round holes in materials such as alloy steel, stainless steel, cast iron, aluminum and other non-ferrous metals. Our twist drill for metal machining is widely used in CNC machining centers and automatic production lines in the automotive, aerospace and general engineering industries.
HSS twist drill / high speed steel twist drill: Good toughness, economical, ideal for general machining and small to medium batch production.
HSS M42 cobalt twist drill: Higher hot hardness and red-hardness, suitable for tougher steels and higher cutting speeds.
Solid carbide twist drill / carbide twist drill bits: Very high hardness and wear resistance, best for high-precision, high-speed drilling and long production runs in hardened steel and cast iron.
For general steels and non-ferrous metals, HSS twist drill bits and high speed steel twist drill bits offer a good balance of toughness and cost. For hard alloys or abrasive materials, carbide twist drill and tungsten carbide twist drill bits provide higher hardness and longer tool life. For difficult materials like stainless steel and cast iron, we recommend coated solid carbide twist drill solutions with internal or external coolant.
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 today’s competitive machining environment, the humble twist drill is still one of the most important cutting tools in the workshop. From simple fixture holes to deep precision bores in hardened steel, the right twist drill bit has a direct impact on cycle time, tool life and part quality. At HNCarbide, we focus on supplying high-quality twist drill bits and technical support so manufacturers can achieve stable, predictable drilling in a wide range of metals.
A twist drill is a cylindrical cutting tool with helical flutes. These flutes create the cutting edges, guide the tool and evacuate chips from the hole. When most engineers ask “what is a twist drill bit used for?”, the answer is simple: it is used for producing accurate round holes in metals, plastics and occasionally wood.
Typical twist drill bit uses in metalworking include:
Pilot and through holes for bolts and threaded connections
Holes for dowel pins and alignment features
Oil, coolant and air passages in hydraulic or automotive parts
Cross holes in shafts and tools
In short, wherever a reliable, repeatable hole is required, a twist drill for metal machining is usually the first choice.
Choosing the right tool material is the foundation of good drilling performance.
High speed steel twist drill (HSS)
A high speed steel twist drill or hss twist drill offers good toughness and is forgiving in less rigid setups. HSS twist drill bits are widely used for general engineering, maintenance work and short to medium production runs. They are suitable for mild steel, low-alloy steel and many non-ferrous metals.
HSS M42 cobalt twist drill
For more demanding cuts, the hss m42 cobalt twist drill adds cobalt to the HSS matrix. This improves hot hardness and red-hardness, allowing higher cutting speeds and better performance in tougher steels and heat-resistant alloys. Cobalt twist drill and cobalt twist drill bits are a cost-effective upgrade when standard HSS tools wear too quickly.
Carbide twist drill and solid carbide twist drill
When long tool life and tight tolerances are critical, a carbide twist drill is often the best solution. Carbide twist drill bits and solid carbide twist drill tools deliver very high hardness and wear resistance, making them ideal as a twist drill for stainless steel, hardened steel and abrasive cast iron. For deep holes or high-speed CNC drilling, solid carbide twist drill bit designs with internal or external coolant offer excellent chip evacuation and stability.
Tungsten carbide twist drill
Our premium tungsten carbide twist drill and tungsten carbide twist drill bits are targeted at high-volume production in automotive, aerospace and energy components. They withstand high cutting temperatures and maintain sharp cutting edges over long runs, reducing tool changes and machine downtime.
HNCarbide provides a wide range of twist drill sizes to cover common workshop needs as well as special applications. Standard twist drill bit sizes are available in metric and inch ranges, from small diameters for precision components up to large tools for structural parts. Special lengths, such as a 75mm twist drill bit, can be supplied to match specific fixtures or drilling depths.
To suit different machine interfaces and rigidity requirements, we offer:
Jobber twist drill designs for general-purpose drilling
Straight shank twist drill for standard chucks and collets
Taper shank twist drill for heavy-duty drilling where a rigid spindle connection is needed
Coolant management is equally important. Internal coolant twist drill bits deliver cutting fluid through internal channels directly to the cutting zone, ideal for deep holes and high-speed CNC drilling. External coolant twist drill versions work well on conventional machines where internal coolant supply is not available.
Selecting the right twist drill for metal, and even more specifically a twist drill for stainless steel or a twist drill for cast iron, depends on hardness, toughness and chip formation of the workpiece.
For mild steels and low-alloy steels, high speed steel twist drill bits or cobalt HSS provide a good balance of cost and life.
For stainless steels and difficult alloys, coated carbide twist drill bits or solid carbide twist drill designs give better wear resistance and handle work-hardening tendencies.
For grey and ductile cast iron, tungsten carbide twist drill bits with suitable geometry provide excellent chip control and surface finish.
For softer materials like aluminum or copper alloys, polished flutes and sharp cutting edges are key; here a dedicated twist drill for metal with high chip space prevents clogging.
Although HNCarbide focuses on metal cutting, certain geometries can also serve as a twist drill for wood when the production line needs to handle mixed materials.
Modern manufacturing demands reliable tools that fit into sophisticated production systems. Our twist drill for automotive industry is used in engine blocks, transmission housings and chassis components, where cycle time and consistency are critical. In the aerospace industry, lightweight alloys and heat-resistant materials require high-performance carbide twist drill solutions with advanced coatings and optimized coolant delivery.
For the oil & gas industry, long-life tungsten carbide twist drill tools are used in valve bodies, pumps and downhole components, where abrasive alloys and high production volumes challenge tool performance. Across all these sectors, HNCarbide supports customers with stable quality, technical advice and repeatable production batches.
When you understand what does a twist drill do and how much it influences productivity, the value of a reliable supplier becomes clear. HNCarbide controls the full manufacturing process, from carbide substrate selection and heat treatment of HSS to CNC grinding of flute geometry and application of modern coatings. This ensures every twist drill bit meets strict dimensional tolerances and delivers predictable performance on the machine.
By combining the right tool material—HSS, cobalt or carbide—with suitable geometry, shank style, coolant design and twist drill sizes, we help you choose the most efficient solution for your parts. Whether you need a single prototype batch or a long-running production line, HNCarbide twist drill bits give you stable drilling, longer tool life and cleaner holes, so your machining process stays competitive in today’s demanding metalworking world.
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!
