When it comes to drilling through tough materials, using the right tools is essential. Cobalt drill bit sets are a popular choice for those who need to drill through materials such as stainless steel, titanium, and cast iron. Cobalt drill bit sets are drill bit sets made with a high percentage of cobalt, a hard and durable metal that can withstand high temperatures and maintain its strength.
These drill bits are typically made with a 5% to 8% cobalt alloy, which makes them more resistant to wear and tear than other types of drill bits. They also have a higher heat resistance, allowing them to maintain their sharpness even when drilling through tough materials that generate a lot of heat.
Advantages of Using Cobalt Drill Bits
Cobalt drill bit sets offer several benefits over other types of drill bits. Here are the top advantages of using cobalt drill bits for drilling.
- High Durability: Cobalt drill bits are made from a combination of cobalt and steel, which makes them extremely durable and long-lasting. They are resistant to wear and tear, which means they can be used for drilling through tough materials like metal, wood, and plastic.
- High-Speed Drilling: Cobalt drill bits can drill at high speeds without overheating or losing their cutting edge. They are ideal for use with power drills, making them perfect for DIY projects and professional applications.
- Precision Drilling: Cobalt drill bits are designed with precision in mind. They are accurate, consistent, and produce clean holes with minimal effort. They are ideal for use in precision applications like metalworking, woodworking, and automotive repairs.
- Versatility: Cobalt drill bits are versatile and can be used on a wide range of materials, including stainless steel, cast iron, and other tough alloys. This makes them a valuable tool for any professional or DIY enthusiast.
- Reduced Breakage: Cobalt drill bits have a higher resistance to breakage compared to other types of drill bits. They are designed to withstand high levels of stress and pressure, which means they are less likely to break or snap during use.
Top 10 Best Cobalt Drill Bit Set
We have listed the top 10 best cobalt drill bit sets based on brand reputation and quality. You can judge them by their quality then choose which is best suited to your project.
1. BOSCH CO14B 14-Piece Cobalt M42 Metal Drill Bit Assorted Set
The BOSCH CO14B 14-Piece Cobalt M42 Metal Drill Bit Assorted Set is a premium drill bit set designed for durability, high heat resistance, and enhanced performance. This set includes 14 upgraded M42 Cobalt jobber-length bits that are engineered to withstand high-temperature applications and penetrate tough abrasive materials. In this review, we will explore the key features, performance, pros and cons, user feedback, and rating of this cobalt drill bit set.
Key Features
- Cobalt M42 drill bit – provides upgraded M42 Cobalt jobber-length bits designed for durability, high heat resistance and hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum.
- Enhanced M42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs. Standard bits.
- High-heat resistant bits – withstand high-temperature applications for extended periods of time.
- Thick web-helix design – provides additional stability in tough applications.
- Surface-hardened tip – penetrates tough abrasive materials.
- Includes – 1/16″, 5/64″, 3/32″, 7/64″, 1/8″, 9/64″, 5/32″, 3/16″, 7/32″, 1/4″, 5/16″, 3/8″, 1/2″.
Performance
The BOSCH CO14B 14-Piece Cobalt M42 Metal Drill Bit Assorted Set offers superior performance in drilling through tough materials. The enhanced M42 alloy material, containing 8% Cobalt alloy, delivers 10x life versus standard bits, making them a cost-effective option in the long run. The high-heat resistant bits are designed to withstand high-temperature applications, making them ideal for use in industries such as automotive and aerospace. The thick web-helix design delivers fast material removal and increased stability, while the surface-hardened tip penetrates tough abrasive materials.
Pros
- Enhanced M42 alloy material delivers 10x life versus standard bits
- High-heat resistant bits designed to withstand high-temperature applications
- Thick web-helix design delivers fast material removal and increased stability
- Surface-hardened tip penetrates tough abrasive materials
- Includes a range of sizes suitable for various applications
- Comes with a case for easy storage and transport
Cons
- Some users have reported that the bits can break or wear out quickly when used on harder materials
- Some users have noted that the case is not very durable
User Feedback and Rating
The BOSCH CO14B 14-Piece Cobalt M42 Metal Drill Bit Assorted Set has received positive reviews from users. Many users have reported that these drill bits offer excellent performance and are able to drill through tough materials with ease. Users have also appreciated the range of sizes included in the set, which makes it suitable for various applications. However, some users have reported that the bits can wear out or break quickly when used on harder materials. The set has an average rating of 4.7 out of 5 stars on various e-commerce websites.
2. IRWIN Drill Bit Set, M35 Cobalt Alloy Steel Steel, 29-Piece (3018002)
The IRWIN Drill Bit Set M35 Cobalt Alloy Steel (3018002) is a 29-piece drill bit set designed for drilling through tough metals, including heavy-duty abrasive alloy metal drilling on hardened steel. In this review, we will explore the key features, performance, pros and cons, user feedback, and rating of this cobalt alloy steel drill bit set.
Key Features
- Ideal for drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel.
- Made from industrial grade High-speed steel for increased durability.
- 8% Cobalt Alloy Steel alloy is heat and abrasion-resistant.
- 135-degree split-point tip starts drilling immediately with less force and eliminates “walking” across the work surface.
- Metal index case for easy bit access and identification.
- Includes drill bit sizes 1/16- to 1/2-inch in 1/64-inch increments.
Performance:
The IRWIN Drill Bit Set M35 Cobalt Alloy Steel (3018002) offers exceptional performance when drilling through tough metals. Made from industrial grade High-speed steel, the set is designed for increased durability, and the 8% Cobalt Alloy Steel alloy is heat and abrasion-resistant. The 135-degree split-point tip starts drilling immediately with less force and eliminates “walking” across the work surface, resulting in a more accurate and precise hole. The metal index case provides easy bit access and identification, making it easier to find the right drill bit for the job.
Pros
- Ideal for drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel.
- Made from industrial grade High-speed steel for increased durability.
- 8% Cobalt Alloy Steel alloy is heat and abrasion-resistant.
- 135-degree split-point tip starts drilling immediately with less force and eliminates “walking” across the work surface.
- Metal index case for easy bit access and identification.
- Includes a range of sizes suitable for various applications.
Cons
- Some users have reported that the bits can wear out quickly when drilling through harder materials.
- The set may be more expensive compared to other cobalt alloy steel drill bit sets on the market.
User Feedback and Rating
The IRWIN Drill Bit Set M35 Cobalt Alloy Steel (3018002) has received positive reviews from users. Many users have reported that these drill bits offer excellent performance and are able to drill through tough metals with ease. Users have also appreciated the range of sizes included in the set, which makes it suitable for various applications. However, some users have reported that the bits can wear out quickly when drilling through harder materials. The set has an average rating of 4.6 out of 5 stars on various e-commerce websites.
3. DEWALT Cobalt Alloy Steel Drill Bit Set with Pilot Point, 14-Piece (DWA1240)
The DEWALT Cobalt Alloy Steel Drill Bit Set with Pilot Point (DWA1240) is a 14-piece drill bit set designed for drilling through tough metals such as stainless steel and other hard metals. The set features a patented bit-bar design that allows for easy bit removal and a clear lid that allows you to see inside at a glance. In this review, we will explore the key features, performance, pros and cons, user feedback, and rating of this cobalt alloy steel drill bit set.
Key Features
- Industrial Cobalt Alloy Steel accessories come in a ToughCase+ system designed to optimize storage space and keep your drill bit sets organized.
- PILOT POINT tip and split tip design starts on contact and eliminates bit walking.
- Designed for maximum speed and life in stainless steel and other hard metals.
- Includes 14 pieces suitable for various applications.
Performance
The DEWALT Cobalt Alloy Steel Drill Bit Set with Pilot Point (DWA1240) offers exceptional performance when drilling through tough metals. The PILOT POINT tip and split tip design starts on contact and eliminates bit walking, resulting in a more accurate and precise hole. The set is designed for maximum speed and life in stainless steel and other hard metals, making it ideal for use in industries such as automotive and aerospace. The ToughCase+ system is a connectable case system that is designed to optimize storage space and keep your drill bit sets organized, making it easier to find the right bit for the job.
Pros
- PILOT POINT tip and split tip design starts on contact and eliminates bit walking.
- Designed for maximum speed and life in stainless steel and other hard metals.
- Includes a range of sizes suitable for various applications.
- ToughCase+ system optimizes storage space and keeps your drill bit sets organized.
Cons
- Some users have reported that the bits can wear out quickly when drilling through harder materials.
- The set may be more expensive compared to other cobalt alloy steel drill bit sets on the market.
User Feedback and Rating
The DEWALT Cobalt Alloy Steel Drill Bit Set with Pilot Point (DWA1240) has received positive reviews from users. Many users have reported that these drill bits offer excellent performance and are able to drill through tough metals with ease. Users have also appreciated the ToughCase+ system, which optimizes storage space and keeps the drill bit sets organized. However, some users have reported that the bits can wear out quickly when drilling through harder materials. The set has an average rating of 4.7 out of 5 stars on various e-commerce websites.
4. Drill America – DWD29J-CO-PC 29 Piece M35 Cobalt Drill Bit Set
The Drill America – DWD29J-CO-PC 29 Piece M35 Cobalt Drill Bit Set is a set of jobber length drill bits that includes inch sizes 1/16″ to 1/2″ in 1/64″ increments. In this review, we will explore the key features, performance, pros and cons, user feedback, and rating of this cobalt drill bit set.
Key Features
- Set of 29 jobber length drill bits includes inch sizes 1/16″ to 1/2″ in 1/64″ increments.
- Cobalt steel provides extended tool life compared to high-speed steel drill bits when drilling hard materials.
- Gold oxide finish lubricates the drill bit and provides wear resistance.
- Self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging.
- Meets ANSI specifications.
Performance
The Drill America – DWD29J-CO-PC 29 Piece M35 Cobalt Drill Bit Set offers excellent performance when drilling through hard materials. The cobalt steel provides extended tool life compared to high-speed steel drill bits and maintains the tool’s toughness and hardness in high drilling temperatures. The self-centering 135-degree split point penetrates hard material without a pilot hole and produces smaller chips that reduce clogging compared to a 118-degree point. The gold oxide finish lubricates the drill bit and provides wear resistance, resulting in a longer tool life.
Pros
- Cobalt steel provides extended tool life compared to high-speed steel drill bits when drilling hard materials.
- Self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging.
- Meets ANSI specifications.
- Comes in a plastic index case with labeled compartments for identification and organization.
Cons
- Some users have reported that the bits can break easily when drilling through harder materials.
- The set may be more expensive compared to other cobalt drill bit sets on the market.
User Feedback and Rating
The Drill America – DWD29J-CO-PC 29 Piece M35 Cobalt Drill Bit Set has received positive reviews from users. Many users have reported that these drill bits offer excellent performance and are able to drill through hard materials with ease. Users have also appreciated the plastic index case with labeled compartments, which makes it easier to find the right drill bit for the job. However, some users have reported that the bits can break easily when drilling through harder materials. The set has an average rating of 4.5 out of 5 stars on various e-commerce websites.
5. STROTON Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits
STROTON Cobalt Drill Bit Set is a high-quality set of drill bits that is designed to provide superior performance while drilling through tough materials like stainless steel, cast iron, and aluminum. This drill bit set is made of premium cobalt steel and is ideal for use in a variety of industrial applications.
Key Features
- Made of premium 6% cobalt steel for superior heat, wear, and chip resistance
- 135-degree split point design for immediate drilling and reduced “walking”
- Ground three times for maximum sharpness and cutting ability
- Can be used to drill through a variety of materials, including stainless steel, cast iron, aluminum, and more
- 17-piece set includes a range of sizes from 1/16″ to 1/2″
Performance
STROTON Cobalt Drill Bit Set is designed to provide superior performance while drilling through tough materials. The 6% cobalt steel construction ensures that the drill bits can withstand high temperatures and maintain their sharpness and cutting ability. The 135-degree split point design allows the bits to start drilling immediately and reduces the chances of “walking” across the work surface. The ground three times cutting edge also provides maximum sharpness and durability, making it ideal for use in industrial applications.
Pros
- Made of premium cobalt steel for superior heat and wear resistance
- Can be used to drill through a variety of materials
- 135-degree split point design for immediate drilling
- Ground three times for maximum sharpness and cutting ability
- 17-piece set includes a range of sizes from 1/16″ to 1/2″
Cons
- May be more expensive than other drill bit sets
User Feedback and Rating
Users of the STROTON Cobalt Drill Bit Set have generally given it positive reviews, with many commenting on the set’s durability and performance. Some users have noted that the bits are more expensive than other sets, but have also said that they are worth the investment for their superior performance.
Overall, the STROTON Cobalt Drill Bit Set is a high-quality set of drill bits that is designed to provide superior performance while drilling through tough materials. Its premium cobalt steel construction, 135-degree split point design, and ground three times cutting edge make it an ideal choice for industrial applications.
6. COMOWARE Cobalt Drill Bit Set- 115Pcs M35 High Speed Steel
The COMOWARE Cobalt Drill Bit Set is a comprehensive package of 115 pieces of high-quality M35 high-speed steel drill bits. The set comes with an organized holder for easy storage and organizing.
Key Features
- Includes 29 fractional size drill bits ranging from 1/16” to 1/2” in 1/64th increments.
- Also includes 26 letter size drill bits from A to Z and 60 numbered size drill bits from #1 to #60.
- Made of durable M35 high-speed steel with 5% cobalt for higher heat and abrasion resistance.
- Precise 135° split point and twist design prevents walking and clears chips and particles faster.
- Suitable for cutting through hard materials such as stainless steel, cast iron, high-temperature alloy, titanium alloy, hard plastics, and woods.
- Comes with an organized holder with a size index for easy storage and organizing.
Performance
The COMOWARE Cobalt Drill Bit Set is designed for professional use and can handle tough materials with ease. The M35 high-speed steel with 5% cobalt provides durability and heat resistance, making it ideal for cutting through hard metals such as stainless steel, cast iron, and high-temperature alloy. The precise 135° split point and twist design prevent walking and ensure efficient drilling. The set includes a wide range of drill bit sizes for various applications, making it a versatile tool in any workshop.
Pros
- Comprehensive set with 115 pieces of drill bits in various sizes.
- Made of durable M35 high-speed steel with 5% cobalt for higher heat and abrasion resistance.
- Precise 135° split point and twist design prevents walking and clears chips and particles faster.
- Suitable for cutting through hard materials such as stainless steel, cast iron, high-temperature alloy, titanium alloy, hard plastics, and woods.
- Comes with an organized holder with a size index for easy storage and organizing.
Cons
- The uncoated finish may result in quicker wear and tear.
- The set may be too comprehensive for those who only need a few sizes of drill bits.
User Feedback and Rating
The COMOWARE Cobalt Drill Bit Set has received positive feedback from users who appreciate the comprehensive set and the quality of the drill bits. Users have noted that the drill bits are durable and efficient in cutting through tough materials. The set’s organized holder also makes it easy to store and access the drill bits. The set has received a rating of 4.7 out of 5 stars on various e-commerce websites.
7. Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal
This is a review of a Metric M42 8% Cobalt Twist Drill Bits Set, designed for drilling through hard metals, stainless steel, aluminum, plastic, and hardwood.
Key features
- Premium M42 8% Cobalt Steel
- 68-70 HRC Rockwell Hardness Scale
- 3 steps design for cutting through hard materials
- Capable of running 3 to 5 times faster than regular drill bits
- Sufficiently sharp bit edge for cutting metal into long strips of iron chips
- 19 pieces included with 135-degree split point drill bits
- Made of premium cobalt at $80,000 per ton
Performance
The M42 8% Cobalt Steel in this set gives the drill bits high heat, wear, and chip resistance, as well as a long tool life. The 3 steps design allows for faster and more efficient cutting through hard materials, and the sharp bit edge produces long strips of iron chips rather than slowly grinding through the material. The 135-degree split point drill bits start drilling immediately with less force and eliminate “walking” across the work surface. These drill bits are suitable for drilling through hard metals, stainless steel, aluminum, plastic, and hardwood.
Pros
- High-quality M42 8% Cobalt Steel for durability
- 3 steps design for faster and more efficient cutting
- Sharp bit edge for producing long strips of iron chips
- Suitable for drilling through hard metals, stainless steel, aluminum, plastic, and hardwood
- 19 pieces included with 135-degree split point drill bits
- Comes in a durable case for easy storage and organization
Cons
- Higher price point compared to regular drill bits
- Only suitable for drilling through hard materials, not for general use
User feedback and rating
Users have praised this drill bit set for its durability and efficiency when drilling through hard metals and stainless steel. The 3 steps design and sharp bit edge make drilling faster and easier, and the included case keeps the drill bits organized and easy to find. Some users have noted that the price point is higher compared to regular drill bits, but many feel that the increased durability and efficiency make it worth the investment. Overall, this drill bit set has received positive reviews and high ratings from users.
8. COMOWARE Cobalt Drill Bit Set- 15Pcs M35
The COMOWARE Cobalt Drill Bit Set includes 15 pieces of jobber length drill bits made from 5% Cobalt High-Speed Steel M35. These drill bits are designed for cutting through hard materials such as stainless steel, cast iron, high-temperature alloys, titanium alloys, and hard plastics.
Key Features
- 5% Cobalt High-Speed Steel M35 for extended tool life
- Precise 135° split point and twist design for preventing walking and clearing chips
- Gold oxide finish and round straight shanks for smoother chip movement
- Suitable for cutting through hard materials such as stainless steel, cast iron, high-temperature alloys, and hard plastics
- 15pcs jobber length drill bit set with plastic storage case
- Sizes included: 1/16″ (2pc), 5/64″ (1pc), 3/32″ (2pc), 7/64″ (1pc), 1/8″ (2pc), 9/64″ (1pc), 5/32″ (1pc), 3/16″ (1pc), 7/32″ (1pc), 1/4″ (1pc), 5/16″ (1pc), 3/8″ (1pc)
Performance
The 5% Cobalt High-Speed Steel M35 material provides extended tool life and durability compared to ordinary drill bits. The precise 135° split point and twist design prevent walking and clear chips and particles faster. The gold oxide finish and round straight shanks ensure smoother chip movement. These drill bits are suitable for cutting through hard materials such as stainless steel, cast iron, high-temperature alloys, titanium alloys, hard plastics, and woods.
Pros
- Durable and strong material
- Precise split point and twist design for preventing walking and clearing chips
- Suitable for cutting through hard materials
- Comes with a plastic storage case for easy organization and storage
Cons
- Limited size options included in the set
User Feedback and Rating
Customers who purchased the COMOWARE Cobalt Drill Bit Set were satisfied with the quality and performance of the drill bits. They found them to be durable and effective at cutting through hard materials. The plastic storage case was also appreciated for its convenience. Overall, the set has received positive reviews and a high rating.
9. AMOOLO Cobalt Drill Bit Set 31Pcs (1/16″-1/2″), M35 High Speed Steel Metal Drill Bits
The AMOOLO Cobalt Drill Bit Set is a 31-piece set of high-speed steel drill bits designed for metal drilling. With its industry-grade M35 cobalt steel material and precise drilling performance, this set is perfect for DIY enthusiasts and professionals alike.
Key Features
- Made of M35 cobalt high-speed steel, which is harder and more durable than HSS used in other similar drill bits sets.
- The set includes 20 commonly-used sizes of jobber length industrial drill bits for metal drilling.
- The bits are designed with a fully ground spiral groove that clears particles quickly and efficiently.
- The 135° split point with round straight shank prevents walking and ensures precise and faster drilling performance.
- Suitable for cutting through hard metals such as stainless steel, steel, sheet metal, and cast iron, as well as plastic, aluminum alloy, wood, and other softer metals.
- Comes with a portable plastic case for easy storage and organization.
Performance
The AMOOLO Cobalt Drill Bit Set offers precise and efficient drilling performance due to its fully ground spiral groove design and 135° split point with round straight shank. The cobalt steel material also increases wear-resistance and durability, making it ideal for tough metal drilling applications.
Pros
- Made of high-quality M35 cobalt steel for increased durability and wear-resistance.
- Includes 20 commonly-used sizes of jobber length industrial drill bits for metal drilling.
- The fully ground spiral groove design clears particles quickly and efficiently for faster and cooler drilling performance.
- The 135° split point with round straight shank prevents walking and ensures precise and faster drilling performance.
- Suitable for cutting through a variety of materials, including hard metals and softer metals.
- Comes with a portable plastic case for easy storage and organization.
Cons
- Some users may find the dull gold color finish unappealing.
User Feedback and Rating
The AMOOLO Cobalt Drill Bit Set has received positive feedback from users who appreciate its durability, precision, and efficiency. It has an average rating of 4.7 out of 5 stars on various e-commerce websites, with users commenting on its versatility, ease of use, and value for money.
10. BeHappy Cobalt Drill Bit Set 29pcs, M35 High Speed Steel Metal Drill Bit Set
The BeHappy Cobalt Drill Bit Set is a 29-piece set of high-speed steel drill bits designed for various drilling applications. With its M35 cobalt steel material, 135-degree point nib, and precise cutting performance, this set is ideal for both DIY enthusiasts and professionals.
Key Features
- The set includes 29 drill bits in various sizes, ranging from 1/16″ to 1/2″.
- Made of M35 cobalt high-speed steel, which can effectively drill rigid and high-tensile strength materials, including stainless steel, cast iron, super alloys, titanium alloys, rigid plastics, and wood.
- The 135-degree point nib and twist design improve cutting speed, prevent walking, and speed up debris and particle removal.
- The drill bits are suitable for hardened steel and offer excellent cutting performance due to their hardened and polished blades.
- The set comes with a portable rose case made of German craftsmanship, which is durable and convenient for storage and organization.
Performance
The BeHappy Cobalt Drill Bit Set offers excellent drilling performance due to its M35 cobalt steel material, 135-degree point nib, and precise cutting performance. It can effectively drill through various materials, including hard metals and rigid plastics, making it ideal for both home and professional use.
Pros
- Made of high-quality M35 cobalt steel for increased durability and wear-resistance.
- Includes 29 drill bits in various sizes, suitable for a wide range of drilling applications.
- The 135-degree point nib and twist design improve cutting speed and prevent walking.
- Suitable for drilling through hard metals, such as stainless steel, cast iron, and titanium alloys, as well as rigid plastics and wood.
- Comes with a portable rose case made of German craftsmanship for easy storage and organization.
Cons
- Some users may find the titanium finish less durable than other finishes.
User Feedback and Rating
The BeHappy Cobalt Drill Bit Set has received positive feedback from users who appreciate its durability, precision, and efficiency. It has an average rating of 4.5 out of 5 stars on various e-commerce websites, with users commenting on its versatility, ease of use, and value for money. Some users have also noted that the drill bits remain sharp after prolonged use, making them a reliable addition to their toolset.
Factors to Consider When Choosing a Cobalt Drill Bit Set
Cobalt drill bit sets are essential for professionals and DIY enthusiasts alike, as they provide durability and precision in drilling through hard materials such as stainless steel, titanium, and other alloys. However, with the vast array of cobalt drill bit sets available on the market, it can be challenging to choose the right one for your needs. Here are some factors to consider when selecting a best cobalt drill bit set:
Size Range
The size range of the drill bits in the set is an important consideration. Ensure that the set includes drill bits of different sizes to cater to your various drilling needs. You don’t want to buy a set only to find that it doesn’t have the size you need.
Material
Cobalt drill bits are made of various materials, including M35, M42, and M48 cobalt. M42 is the most commonly used material for cobalt drill bits. It is strong and can withstand high temperatures. M35 is also popular and has a higher cobalt content, making it more durable than M42. M48 is the most expensive and has the highest cobalt content, making it the most durable.
Coating
The coating on the drill bits determines how well they can resist heat and wear. Titanium nitride (TiN) is the most popular coating for cobalt drill bits. It is a hard coating that can withstand high temperatures and provide excellent wear resistance. Cobalt drill bits with TiN coating last longer than those without.
Shank Type
Cobalt drill bits come with different shank types, such as round, hexagonal, and reduced shanks. The shank type you choose should depend on the type of chuck you have on your drill. Round shanks fit into most chucks, while hexagonal shanks provide better grip and reduce slippage. Reduced shanks are ideal for drills with smaller chucks.
Point Angle
The point angle of a drill bit determines how well it can penetrate the material. Cobalt drill bits come with different point angles, such as 118 degrees, 135 degrees, and 150 degrees. A 118-degree point angle is ideal for drilling through softer materials, while a 135-degree point angle is suitable for harder materials. A 150-degree point angle is best for drilling through plastics and other soft materials.
Flute Design
The flute design of a cobalt drill bit affects its chip removal and cutting performance. Two flute designs are common – the helical flute and the straight flute. The helical flute design is more efficient in removing chips and reducing heat buildup, while the straight flute design provides better rigidity and stability.
Price
Cobalt drill bit sets come in different price ranges. You should choose a set that fits your budget and meets your needs. It is essential to note that cheaper sets may not be of high quality, and they may not last long. Investing in a high-quality set will save you money in the long run.
Final Words
When choosing a cobalt drill bit set, it is crucial to consider factors such as material, coating, and price. M42 and M35 are the most popular materials for cobalt drill bits, while titanium nitride (TiN) is the preferred coating for its high wear resistance. It is also important to choose a set that fits your budget while ensuring that it is of high quality and will last for a long time.
Some of the best cobalt drill bit sets on the market today include the BOSCH CO14B 14-Piece Cobalt M42 set, IRWIN Drill Bit Set 3018002, DEWALT Cobalt Alloy Steel Drill Bit Set DWA1240 set. These sets offer a range of sizes, high-quality materials, and efficient designs, making them a great investment for professionals and DIY enthusiasts alike.
FAQs
What are cobalt drill bits, and why are they useful?
Cobalt drill bits are made of high-speed steel with added cobalt. They are designed for drilling through hard materials, such as stainless steel, titanium, and other alloys, where regular drill bits would fail.
What makes cobalt drill bits different from regular drill bits?
Cobalt drill bits are made of a higher-grade steel with added cobalt, making them more durable and able to withstand high temperatures. They also have a harder and more abrasion-resistant coating.
What size range is typically included in a cobalt drill bit set?
Cobalt drill bit sets usually come with a range of sizes, from 1/16 inch to 1/2 inch, or even larger. The size range can vary depending on the specific set.
What shank types are available for cobalt drill bits?
Cobalt drill bits come in different shank types, including round, hexagonal, and reduced shanks. The shank type you choose should depend on the type of chuck you have on your drill.
What is the best material for cobalt drill bits?
M42 is the most commonly used material for cobalt drill bits. It is strong and can withstand high temperatures. M35 is also popular and has a higher cobalt content, making it more durable than M42. M48 is the most expensive and has the highest cobalt content, making it the most durable.
What is the best point angle for cobalt drill bits?
The point angle of a drill bit determines how well it can penetrate the material. A 135-degree point angle is suitable for harder materials, while a 118-degree point angle is ideal for drilling through softer materials. A 150-degree point angle is best for drilling through plastics and other soft materials.
What is the difference between a straight flute and a helical flute design?
The flute design of a cobalt drill bit affects its chip removal and cutting performance. The helical flute design is more efficient in removing chips and reducing heat buildup, while the straight flute design provides better rigidity and stability.
What is the best coating for cobalt drill bits?
Titanium nitride (TiN) is the most popular coating for cobalt drill bits. It is a hard coating that can withstand high temperatures and provide excellent wear resistance. Cobalt drill bits with TiN coating last longer than those without.
Can cobalt drill bits be used on wood or other softer materials?
Cobalt drill bits are designed for drilling through hard materials and may not perform as well on softer materials such as wood. It is recommended to use a regular drill bit for softer materials.
What should I look for when choosing a cobalt drill bit set?
When choosing a cobalt drill bit set, consider factors such as size range, material, coating, shank type, point angle, flute design, and price. It is essential to invest in a high-quality set that meets your needs and provides durability and precision in drilling through hard materials.
