The Internal Coolant 3 8 drill bit with TiXCo3 coating is engineered for high-precision and high-efficiency drilling in demanding metalworking applications. Designed with optimized internal coolant channels, this 3 8 drill bit ensures effective heat dissipation and stable chip evacuation, even in deep-hole and continuous drilling operations.
Manufactured from premium solid carbide, the 3 8 drill bit for metal delivers excellent rigidity and wear resistance when machining steel, stainless steel, cast iron, and alloy materials. The advanced TiXCo3 coating reduces friction, improves thermal stability, and extends tool life under high cutting speeds and feed rates.
With accurate diameter control and consistent cutting edges, this 3 8 drill bit size in mm equivalent supports both inch and metric machining systems. It is an ideal choice for CNC machining centers requiring reliable performance, improved surface finish, and long-term process stability.
| Order Number | d | l | D | L | HA | HB |
|---|---|---|---|---|---|---|
| HN-3D-CD-0090 | 9 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0091 | 9.1 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0092 | 9.2 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0093 | 9.3 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0094 | 9.4 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0095 | 9.5 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0096 | 9.6 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0097 | 9.7 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0098 | 9.8 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0099 | 9.9 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0100 | 10 | 47 | D10 | 89 | HA | HB |
| Order Number | d | l | D | L | HA | HB |
|---|---|---|---|---|---|---|
| HN-5D-CD-0090 | 9 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0091 | 9.1 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0092 | 9.2 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0093 | 9.3 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0094 | 9.4 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0095 | 9.5 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0096 | 9.6 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0097 | 9.7 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0098 | 9.8 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0099 | 9.9 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0100 | 10 | 61 | D10 | 103 | HA | HB |
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 3 8 Drill Bit drawings clearly show key 3 8 Drill Bit dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right 3 8 Drill Bit sizes for your CNC setup and machining depth before ordering.
A 3 8 drill bit is a drill bit with a nominal diameter of 3/8 inch, commonly used in inch-based machining systems. It is widely applied in CNC machining, fabrication, and general drilling due to its balanced size, strength, and versatility across different materials.
The closest 3 8 drill bit equivalent in mm is 9.5 mm. A 10 mm drill bit is sometimes used as an alternative, but it is slightly larger and may affect hole tolerance depending on the application.
Yes. A 3 8 drill bit for metal, especially when made from solid carbide or cobalt, is well suited for drilling steel, stainless steel, and alloy materials. Advanced coatings such as TiXCo3 or ALCRONA further improve wear resistance and heat stability.
Common coatings for a 3 8 drill bit include:
TiXCo3 coating, which reduces friction and improves wear resistance for general metal drilling.
ALCRONA coating, which offers excellent thermal stability and oxidation resistance for high-speed and high-temperature applications.
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 Internal Coolant 3 8 drill bit with ALCRONA coating is designed for stable, high-speed drilling in advanced CNC machining applications. Integrated internal coolant channels allow coolant to reach the cutting edges directly, helping this 3 8 drill bit maintain low cutting temperatures, efficient chip evacuation, and consistent hole quality during deep and continuous drilling.
Produced from fine-grain solid carbide, this 3 8 drill bit for metal performs reliably when machining stainless steel, alloy steel, carbon steel, and cast iron. The ALCRONA coating offers excellent oxidation resistance and thermal stability, making the tool suitable for high cutting speeds and dry or minimal-lubrication conditions.
With precise diameter control and a reliable 3 8 drill bit size in mm equivalent, this drill bit supports both inch and metric systems. It is an ideal solution for manufacturers seeking long tool life, stable performance, and improved productivity in precision drilling operations.
| Order Number | d | l | D | L | HA | HB |
|---|---|---|---|---|---|---|
| HN-3D-CD-0090-A | 9 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0091-A | 9.1 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0092-A | 9.2 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0093-A | 9.3 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0094-A | 9.4 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0095-A | 9.5 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0096-A | 9.6 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0097-A | 9.7 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0098-A | 9.8 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0099-A | 9.9 | 47 | D10 | 89 | HA | HB |
| HN-3D-CD-0100-A | 10 | 47 | D10 | 89 | HA | HB |
| Order Number | d | l | D | L | HA | HB |
|---|---|---|---|---|---|---|
| HN-5D-CD-0090-A | 9 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0091-A | 9.1 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0092-A | 9.2 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0093-A | 9.3 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0094-A | 9.4 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0095-A | 9.5 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0096-A | 9.6 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0097-A | 9.7 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0098-A | 9.8 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0099-A | 9.9 | 61 | D10 | 103 | HA | HB |
| HN-5D-CD-0100-A | 10 | 61 | D10 | 103 | HA | HB |
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 3 8 Drill Bit drawings clearly show key 3 8 Drill Bit dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right 3 8 Drill Bit sizes for your CNC setup and machining depth before ordering.
A 3 8 drill bit is a drill bit with a nominal diameter of 3/8 inch, commonly used in inch-based machining systems. It is widely applied in CNC machining, fabrication, and general drilling due to its balanced size, strength, and versatility across different materials.
The closest 3 8 drill bit equivalent in mm is 9.5 mm. A 10 mm drill bit is sometimes used as an alternative, but it is slightly larger and may affect hole tolerance depending on the application.
Yes. A 3 8 drill bit for metal, especially when made from solid carbide or cobalt, is well suited for drilling steel, stainless steel, and alloy materials. Advanced coatings such as TiXCo3 or ALCRONA further improve wear resistance and heat stability.
Common coatings for a 3 8 drill bit include:
TiXCo3 coating, which reduces friction and improves wear resistance for general metal drilling.
ALCRONA coating, which offers excellent thermal stability and oxidation resistance for high-speed and high-temperature applications.
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 External Coolant 3 8 drill bit with TiXCo3 coating is designed for reliable and cost-effective drilling in a wide range of CNC and conventional machining applications. Using external coolant delivery, this 3 8 drill bit provides effective chip evacuation and temperature control in shallow to medium-depth drilling operations.
Manufactured from solid carbide, the 3 8 drill bit for metal offers excellent rigidity and wear resistance when machining steel, stainless steel, aluminum, and cast iron. The TiXCo3 coating reduces friction at the cutting edge, enhances heat resistance, and improves tool life under stable cutting conditions.
With precise geometry and consistent diameter accuracy, this 3 8 drill bit size in mm equivalent supports both inch and metric machining systems. It is an ideal choice for machining centers and workshops seeking dependable drilling performance, flexible coolant setup, and efficient production at controlled operating costs.
| Order Number | d | l | D | L | HA | HB |
|---|---|---|---|---|---|---|
| HN-3D-TD-0090 | 9 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0091 | 9.1 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0092 | 9.2 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0093 | 9.3 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0094 | 9.4 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0095 | 9.5 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0096 | 9.6 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0097 | 9.7 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0098 | 9.8 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0099 | 9.9 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0100 | 10 | 47 | 10 | 89 | HA | HB |
| Order Number | d | l | D | L | HA | HB |
|---|---|---|---|---|---|---|
| HN-5D-TD-0090 | 9 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0091 | 9.1 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0092 | 9.2 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0093 | 9.3 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0094 | 9.4 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0095 | 9.5 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0096 | 9.6 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0097 | 9.7 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0098 | 9.8 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0099 | 9.9 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0100 | 10 | 61 | D10 | 103 | HA | HB |
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 3 8 Drill Bit drawings clearly show key 3 8 Drill Bitt dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right 3 8 Drill Bit sizes for your CNC setup and machining depth before ordering.
A 3 8 drill bit is a drill bit with a nominal diameter of 3/8 inch, commonly used in inch-based machining systems. It is widely applied in CNC machining, fabrication, and general drilling due to its balanced size, strength, and versatility across different materials.
The closest 3 8 drill bit equivalent in mm is 9.5 mm. A 10 mm drill bit is sometimes used as an alternative, but it is slightly larger and may affect hole tolerance depending on the application.
Yes. A 3 8 drill bit for metal, especially when made from solid carbide or cobalt, is well suited for drilling steel, stainless steel, and alloy materials. Advanced coatings such as TiXCo3 or ALCRONA further improve wear resistance and heat stability.
Common coatings for a 3 8 drill bit include:
TiXCo3 coating, which reduces friction and improves wear resistance for general metal drilling.
ALCRONA coating, which offers excellent thermal stability and oxidation resistance for high-speed and high-temperature applications.
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 External Coolant 3 8 drill bit with ALCRONA coating is developed for high-speed and stable drilling operations where external coolant systems are preferred. Designed for CNC and general machining, this 3 8 drill bit ensures reliable chip evacuation and consistent cutting performance in shallow and medium-depth holes.
Produced from fine-grain solid carbide, the 3 8 drill bit for metal performs effectively when machining stainless steel, alloy steel, carbon steel, and cast iron. The ALCRONA coating provides excellent thermal stability and oxidation resistance, allowing the tool to maintain cutting edge integrity under elevated temperatures and higher spindle speeds.
With accurate diameter control and a consistent 3 8 drill bit size in mm equivalent, this drill bit supports both inch and metric standards. It is an ideal solution for manufacturers seeking long tool life, process stability, and efficient drilling performance with external coolant delivery.
| Order Number | d | l | D | L | HA | HB |
|---|---|---|---|---|---|---|
| HN-3D-TD-0090-A | 9 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0091-A | 9.1 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0092-A | 9.2 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0093-A | 9.3 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0094-A | 9.4 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0095-A | 9.5 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0096-A | 9.6 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0097-A | 9.7 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0098-A | 9.8 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0099-A | 9.9 | 47 | 10 | 89 | HA | HB |
| HN-3D-TD-0100-A | 10 | 47 | 10 | 89 | HA | HB |
| Order Number | d | l | D | L | HA | HB |
|---|---|---|---|---|---|---|
| HN-5D-TD-0090-A | 9 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0091-A | 9.1 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0092-A | 9.2 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0093-A | 9.3 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0094-A | 9.4 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0095-A | 9.5 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0096-A | 9.6 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0097-A | 9.7 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0098-A | 9.8 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0099-A | 9.9 | 61 | D10 | 103 | HA | HB |
| HN-5D-TD-0100-A | 10 | 61 | D10 | 103 | HA | HB |
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 3 8 Drill Bit drawings clearly show key 3 8 Drill Bit dimensions such as diameter, radius, flute length and overall length. This helps you confirm the right 3 8 Drill Bit sizes for your CNC setup and machining depth before ordering.
A 3 8 drill bit is a drill bit with a nominal diameter of 3/8 inch, commonly used in inch-based machining systems. It is widely applied in CNC machining, fabrication, and general drilling due to its balanced size, strength, and versatility across different materials.
The closest 3 8 drill bit equivalent in mm is 9.5 mm. A 10 mm drill bit is sometimes used as an alternative, but it is slightly larger and may affect hole tolerance depending on the application.
Yes. A 3 8 drill bit for metal, especially when made from solid carbide or cobalt, is well suited for drilling steel, stainless steel, and alloy materials. Advanced coatings such as TiXCo3 or ALCRONA further improve wear resistance and heat stability.
Common coatings for a 3 8 drill bit include:
TiXCo3 coating, which reduces friction and improves wear resistance for general metal drilling.
ALCRONA coating, which offers excellent thermal stability and oxidation resistance for high-speed and high-temperature applications.
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 3 8 drill bit is widely used across CNC machining, fabrication, and industrial drilling operations due to its balanced diameter and versatility. This size is ideal for drilling accurate holes in steel, stainless steel, aluminum, cast iron, wood, and composite materials, making the 3 8 drill bit for metal a standard choice in workshops and production lines.
From general-purpose drilling to precision hole-making, the 3 8 drill bit performs reliably in both manual and CNC setups. Available in standard and long 3 8 drill bit designs, as well as internal and external coolant options, it supports a wide range of machining conditions. With consistent cutting performance and stable chip evacuation, the 3 8 drill bit size in mm equivalent ensures compatibility across inch and metric systems.
Each 3 8 drill bit is engineered for precision drilling and long tool life in demanding machining environments. Manufactured from solid carbide or cobalt materials, this 3 8 drill bit offers excellent rigidity, wear resistance, and dimensional accuracy during continuous drilling operations.
Optimized flute geometry and cutting-edge design improve chip evacuation and reduce heat buildup, especially when drilling steel and stainless steel. Advanced coatings such as TiXCo3 and ALCRONA further enhance performance by lowering friction and increasing thermal stability. With accurate diameter control and reliable 3 8 drill bit in mm conversion, this tool delivers consistent hole quality and repeatable results across different machines and materials.
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 3 8 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 3 8 Drill Bit.
Each of your tungsten 3 8 Drill Bit will be sandblasted to effectively remove burrs and improve the finish.
All HNCarbide’s 3 8 Drill Bit 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 3 8 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 3 8 drill bit is a drill bit with a nominal diameter of 3/8 inch, commonly used in inch-based machining systems. It is widely applied in CNC machining, fabrication, and general drilling due to its balanced size, strength, and versatility across different materials.
The closest 3 8 drill bit equivalent in mm is 9.5 mm. A 10 mm drill bit is sometimes used as an alternative, but it is slightly larger and may affect hole tolerance depending on the application.
Yes. A 3 8 drill bit for metal, especially when made from solid carbide or cobalt, is well suited for drilling steel, stainless steel, and alloy materials. Advanced coatings such as TiXCo3 or ALCRONA further improve wear resistance and heat stability.
Common coatings for a 3 8 drill bit include:
TiXCo3 coating, which reduces friction and improves wear resistance for general metal drilling.
ALCRONA coating, which offers excellent thermal stability and oxidation resistance for high-speed and high-temperature applications.
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 3 8 drill bit is one of the most widely used drill sizes in both industrial and general machining applications. Thanks to its balanced diameter, it is suitable for a wide range of materials, including metal, wood, plastics, and composites. Whether used in CNC machining centers or conventional drilling setups, the 3 8 drill bit offers an excellent combination of precision, strength, and versatility.
In this guide, we will explain what a 3 8 drill bit is, how big it is in metric units, common applications, available material and coating options, and how to select the right drill bit for your specific drilling requirements.
A 3 8 drill bit refers to a drill bit with a nominal diameter of 3/8 inch, which is commonly used in inch-based machining systems. This size is widely adopted in North America and in international workshops that work with imperial tooling standards.
Because of its moderate diameter, the 3 8 drill bit is frequently used for through-holes, threaded holes, and clearance holes. It is large enough to provide mechanical strength while still maintaining good cutting stability and accuracy.
A common question among machinists is: what size is a 3 8 drill bit in mm?
3/8 inch = 9.525 mm
In practice, a 3 8 drill bit in mm is often compared with 9.5 mm or 10 mm drill bits, depending on tolerance requirements. While 10 mm is sometimes considered the closest metric alternative, it is slightly larger than the true 3 8 drill bit equivalent in mm.
Understanding 3 8 drill bit conversion is especially important when working across inch and metric systems, particularly in CNC machining where dimensional accuracy is critical.
The 3 8 drill bit for metal is commonly used in steel, stainless steel, cast iron, and aluminum machining. With the right material and coating, it can handle both low-speed and high-speed drilling operations.
Solid carbide and cobalt 3 8 drill bits are preferred for metalworking due to their rigidity, wear resistance, and ability to maintain hole accuracy under load.
In addition to metal, a 3 8 drill bit for wood is widely used in woodworking, furniture manufacturing, and construction. It is also suitable for plastics, composites, and non-ferrous materials when proper cutting parameters are applied.
Standard-length tools are not always sufficient for deep-hole drilling. In these cases, long 3 8 drill bit and extra long 3 8 drill bit designs are required.
Extended-length options such as:
12 inch 3 8 drill bit
3 8 drill bit extension
3 8 drill bit extender
are commonly used in mold making, structural components, and deep cavity machining. For best performance, long 3 8 drill bits are often combined with internal coolant designs to ensure effective chip evacuation and temperature control.
Choosing between internal and external coolant delivery is an important decision.
An internal coolant 3 8 drill bit features built-in coolant channels that deliver coolant directly to the cutting edges. This design is ideal for deep-hole drilling, high-speed CNC machining, and materials such as stainless steel and alloy steel.
An external coolant 3 8 drill bit, on the other hand, relies on external coolant flow. It is suitable for shallow to medium-depth holes and offers a cost-effective solution for general drilling operations.
Advanced coatings significantly improve drilling performance and tool life.
TiXCo3 coating reduces friction and improves wear resistance, making it suitable for general metal drilling.
ALCRONA coating provides excellent thermal stability and oxidation resistance, ideal for high-speed drilling and elevated temperatures.
Choosing the right coating allows a 3 8 drill bit to perform consistently across different materials and machining conditions.
Comparisons such as 3 8 drill bit vs 1 4, 5 16 vs 3 8 drill bit, and 11 32 vs 3 8 drill bit are common when selecting the correct hole size.
A 1/4 drill bit is significantly smaller and not suitable when higher strength or larger fasteners are required.
11/32 inch is the closest smaller imperial size.
7/16 inch is the next size up from a 3 8 drill bit and is noticeably larger.
Understanding these differences helps avoid tolerance issues and ensures proper fit for fasteners and tapped holes.
If you don’t have a 3 8 drill bit, possible alternatives include:
9.5 mm drill bit (closest metric equivalent)
11/32 inch drill bit (slightly smaller)
10 mm drill bit (slightly larger, depending on tolerance)
However, for precision applications, using the correct 3 8 drill bit size is always recommended.
When selecting a 3 8 drill bit, consider the following factors:
Material being drilled (metal, wood, composite)
Hole depth and length requirements
Internal vs external coolant
Coating type and cutting speed
CNC or manual drilling setup
By matching the tool design to your application, you can achieve better hole quality, longer tool life, and improved machining efficiency.
The 3 8 drill bit remains a versatile and essential tool across a wide range of drilling applications. From understanding 3 8 drill bit size in mm to choosing the right coating, length, and coolant configuration, making informed decisions ensures optimal performance and consistent results.
Whether used for metal, wood, or industrial CNC machining, a high-quality 3 8 drill bit delivers precision, reliability, and long-term value in modern manufacturing environments.
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!
