If you’re looking for a reliable solution to bore through hardened steel, having the right drill bit is key. But with so many options available, it can be tough to know which one to choose. Before purchasing, there are a few factors to consider. Firstly, what type of steel will you be drilling through? Different types of steel have different hardness levels, so you need to make sure you match the drill bit material to the hardness of the steel. Also, consider the size of the hole you need to drill and the depth required. Finally, it’s worth looking at the coating of the drill bit, as this can impact its performance and longevity.
If you need to drill through hardened steel, using an ordinary drill bit is likely to lead to frustration and disappointment. Investing in a high-quality drill bit specifically designed for hardened steel will not only save you time and effort, but will also help ensure precision and accuracy. When shopping for drill bits for hardened steel, you may want to ask yourself questions such as: What is the drill bit’s durability? What is its speed and accuracy? Will it require regular maintenance? Are there any additional features that are important to you, such as a non-slip design or a streamlined shape? By taking the time to carefully consider these factors, you’ll be much more likely to find a drill bit that meets your needs and delivers excellent results.
10 Best Drill Bits For Hardened Steel
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The product is ideal for heavy-duty drilling tasks that require precise and accurate results.
Ideal for drilling through tough materials with high precision and accuracy in various industrial applications.
Ideal for heavy duty drilling projects, with a range of sizes from 1/16" – 1/2" x 64ths and black and gold finish.
Ideal for drilling in hard materials with precision, using a variety of bit sizes and types.
Ideal for drilling through various materials with precision, speed, and durability.
Ideal for drilling large diameter holes in tough materials with reduced shank design for compatibility with various drill chucks.
Ideal for precision drilling in a variety of materials with metric measurements and a conventional point.
This drill bit set is ideal for tough drilling tasks with its 135 degree split point and three flat shank.
The product is ideal for drilling into various materials with precision and durability due to its titanium nitride coating.
Ideal for heavy-duty drilling tasks in wood, metal, and plastic with precise starts thanks to pilot point design.
1. Norseman Drill Bits 44170 Ultra Dex Type 240-Ub 135 Degree Split Point Magnum Super Premium Jobber Drill Set (29 Piece)
The 29 pc. Ultra Dex Set is an ideal choice for professionals and DIY enthusiasts who require high quality and accurate drill bits. This set is made of premium high-speed steel, which is known for its durability and resistance to wear and tear. The NAS 907B 135-degree split point design ensures that the bits penetrate the material efficiently, reducing the risk of walking or slipping. The set includes drill bits ranging from 1/16 to 1/2 by 64ths, providing a wide range of options for various drilling applications. The Ultra Dex drill bits are precision ground to ensure the accuracy of the point, flutes, body, clearance, and drill diameter. The precision of these drill bits ensures that the user can achieve ultimate accuracy and performance. The Hi-Molybdenum tool steel used in the manufacturing of these bits makes them highly durable and resistant to wear and tear. The gold oxide finish adds to the durability of the bits and also provides lubrication during use, reducing heat buildup and extending the lifespan of the bits.
- Made of premium high-speed steel
- NAS 907B 135-degree split point design ensures efficient penetration
- Precision ground for ultimate accuracy and performance
- Hi-Molybdenum tool steel makes the bits highly durable
2. Drill America – D/a29j-Co-Pc 29 Piece M42 Cobalt Drill Bit Set In Round Case (1/16" – 1/2" X 64ths), D/aco Series
The 29-piece M42 Cobalt Drill Bit Set is an essential tool for drilling through tough, high tensile strength materials like stainless steel, Inconel, and titanium. The set includes drill bits in sizes ranging from 1/16" to 1/2" with 1/64" increments. The drill bits are manufactured to Aerospace Standard 907, display high red hardness, and permit speeds up to 30% greater than conventional M2 high-speed steel. The cobalt steel construction provides an extended tool life compared to high-speed steel drill bits and maintains the tool's toughness and hardness in high drilling temperatures. The gold oxide finish acts as a lubricant and provides wear resistance, making the drill bits more durable. The round shanks allow for use with a wide variety of tool holding systems, making it versatile and efficient in different drilling applications.
The drill set is designed for convenience and portability with a unique round drill index that is easy to carry around. The set can be effortlessly gripped in one hand, just like a travel coffee mug, or left in the cup holder of your truck when on the way to a job. When all hands are on deck, the drill index can be hung on your belt whether you're in the shop or field. The drill index combines form and function in a beautifully designed, easy-to-carry drill set.
- Cobalt construction provides an extended tool life compared to high-speed steel drill bits
- Gold oxide finish acts as a lubricant and provides wear resistance
- Round shanks allow for use with a wide variety of tool holding systems
- Unique round drill index is easy to carry around
3. Drill America – Kfd29j-Pc 29 Piece Heavy Duty High Speed Steel Drill Bit Set With Black And Gold Finish In Round Case (1/16" – 1/2" X 64ths), Kfd Series
The assortment of 29 jobber length drill bits is a must-have for professionals and DIY enthusiasts. The set includes inch sizes ranging from 1/16" to 1/2", with 1/64" increments, providing versatility for various applications. The drill bits are made of high-speed steel (HSS) which provides exceptional hardness for wear resistance, making them durable and long-lasting. The black and gold oxide finish on the drill bits adds to their durability by resisting corrosion and increasing their hardness. The self-centering 135-degree split point is a unique feature that allows the drill bit to penetrate hard materials without the need for a pilot hole. This feature also produces small chips that reduce clogging, making the drilling process smooth and efficient. The drill bits come in a plastic storage case which makes them easy to transport and helps keep them organized.
- Versatile range of inch sizes from 1/16" to 1/2" with 1/64" increments
- Made of high-speed steel (HSS) for exceptional hardness and wear resistance
- Black and gold oxide finish resists corrosion and increases the hardness of the drill bit
- Self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging
- Comes in a plastic storage case for easy transportation and organization
4. Dewalt Drill Bit Set, Pilot Point, Cobalt Alloy Steel, 29-Piece (Dwa1269)
The High-Speed Steel Drill Bit Set is designed to offer maximum speed and longevity to its users. The pilot point and split tip design of the bits ensure precision drilling without any bit walking, providing the user with more control. These bits are specially crafted to be used on hard metals, making them ideal for a range of metal working projects.
- Offers maximum speed and longevity
- Pilot point and split tip design ensures precision drilling
- No bit walking providing the user with more control
- Ideal for a range of metal working projects
5. Irwin Drill Bit Set, High-Speed Steel, 29-Piece (3018005)
The Premium High-Speed Steel Drill Bit Set is an excellent tool for all your drilling needs. The set is made from high-quality, durable high-speed steel that can withstand extended drilling in tough materials. The black and gold oxide finish of the bits provides maximum corrosion resistance, ensuring that the bits last for a long time. The 135-degree split-point tip of the bits starts drilling immediately with less force and eliminates 'walking' across the work surface. This feature makes it easier to drill precise holes without any slips or mistakes.
The set comes with a metal index case that allows for easy access and identification of the bits. The case also ensures that the bits stay organized and in good condition. The set includes drill bit sizes ranging from 1/16- to 1/2-inch in 1/64-inch increments, making it a versatile set that can handle a wide range of drilling tasks.
- Made from high-quality, durable high-speed steel
- Black and gold oxide finish provides maximum corrosion resistance
- 135-degree split-point tip starts drilling immediately with less force
- Metal index case allows for easy access and identification of bits
- Includes drill bit sizes ranging from 1/16- to 1/2-inch in 1/64-inch increments
6. Drill America 8 Piece M35 Cobalt Reduced Shank Drill Bit Set In Metal Case (9/16" – 1" X 16ths), Dwdco Series
The 8 Piece Set with 1/2" Reduced Shank Drill Bits is a must-have tool for those who frequently work with tough, high tensile strength materials like stainless steel, Inconel, and titanium. The set includes drill bits of different sizes ranging from 9/16" to 1" to cater to different drilling requirements. The reduced shank drills expand the size range capacity of a portable drill chuck, making it highly versatile and easy to use.
These drill bits feature a 135 degree split point tip that allows for self-centering and reduces thrust, making drilling easier and more efficient. The common flute and overall length of the drill bits ensure minimal adjustment during tool changes, saving time and effort.
The drill bits are manufactured to Aerospace Standard 907, ensuring high red hardness that permits speeds up to 30% greater than with conventional M2 high speed steel. This feature makes them highly efficient and durable, ensuring that they last for a long time.
Whether you are a professional or a DIY enthusiast, the 8 Piece Set with 1/2" Reduced Shank Drill Bits is an excellent choice for all your drilling needs. The set is highly reliable, efficient, and easy to use, making it a must-have for anyone who works with tough, high tensile strength materials on a regular basis.
- Highly efficient and durable drill bits
- Manufactured to Aerospace Standard 907
- Reduced shank drills expand the size range capacity of a portable drill chuck
- Common flute and overall length for minimal adjustment during tool changes
- 135 degree split point tip for self-centering and reducing thrust
7. Chicago Latrobe 57725 150 Series High-Speed Steel Jobber Length Drill Bit Set With Metal Case, Black Oxide Finish, 118 Degree Conventional Point, Metric, 25-Piece, 1.0mm – 13.0mm In 0.5mm Increments
The Set of 25 Jobber Length Drill Bits is a comprehensive kit that includes metric sizes ranging from 1.0 to 13.0 mm, with 0.5 mm increments. These drill bits are made using high-speed steel (HSS) which provides superior hardness, making them highly resistant to wear and tear. The black oxide finish reduces bit wear and promotes chip and coolant flow on ferrous material, thereby increasing the life of the bits. The 118-degree conventional point is perfect for a wide range of drilling applications. These drill bits conform to the DIN 338 standard, ensuring their quality and reliability. Proudly made in the USA, these drill bits are a must-have for anyone who needs to drill through ferrous materials.
- Comprehensive kit with 25 different sizes
- Made from high-speed steel for superior hardness
- Black oxide finish reduces bit wear and promotes chip and coolant flow
- 118-degree conventional point suitable for a range of drilling applications
- Conforms to DIN 338 standard
8. Norseman Super Premium Magnum 29 Piece Drill Bit Set – Orange Ultradex – 46962-135 Degree Split Point – Round Shank With Three Flats
The Norseman Drill & Tool 46962 Type 190-AQF Premium Ultra-Dex Bully 29 Piece Jobber Length Drill Bit Set is a top-quality product that is perfect for professionals and DIY enthusiasts alike. The set comes in an attractive orange case that is easy to carry and store. The set includes 29 drill bits that have a three flats shank and are made from high molybdenum steel. The drill bits are coated in gold and black oxide to prevent rust and wear. The set is made in the USA and is designed to last.
The three flats shank design of the drill bits makes them easy to grip and prevents slipping during use. This design also ensures that the drill bits are securely held in the chuck of the drill. The high molybdenum steel used in the construction of the drill bits makes them incredibly durable and able to handle tough materials. The gold and black oxide coating on the drill bits prevents rust and wear, ensuring that they have a long lifespan.
This drill bit set is an excellent choice for those who need a versatile and reliable set of drill bits that can handle a wide range of materials. Whether you are a professional or a DIY enthusiast, this set is a great investment that will last for years to come.
- Durable and long-lasting
- Versatile and reliable
- Easy to grip and prevents slipping
- Comes in an attractive orange case
9. Dewalt Titanium Nitride Coated Drill Bit Set With Pilot Point, 29-Piece (Dw1369)
The Titanium Nitride Coated Pilot Point drill bit set is a must-have for any DIY or professional project. These drill bits are designed to last longer than standard bits due to their special coating. The coating reduces wear and tear, providing a longer lifespan for each bit. This set includes sizes ranging from 1/16-inch to 1/2-inch, giving the user a variety of options for different projects. The bits are stored in a tough case that keeps them organized and protected.
- Titanium Nitride Coating for longer bit life
- Starts on contact for cleaner holes
- No spin shanks
- Tapered web provides greater durability to reduce breaking
- Includes a range of sizes from 1/16-inch to 1/2-inch
- Comes with a tough case for storage and protection
10. Dewalt Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (Dw1361)
The DEWALT drill bit set is a must-have for any DIY enthusiast or professional tradesperson. This set comes with 21 different sizes of bits, ranging from 1/16-inch to 1/2-inch, that are designed to tackle a wide range of drilling tasks. The bits are organized in a connectable accessory storage system that optimizes storage space and keeps your workspace clutter-free.
The patented bit-bar design allows for easy removal of bits and customizable placement. Plus, the tapered web provides greater durability to reduce breaking, making these bits a reliable and long-lasting addition to your toolkit. The clear lid of the Titanium Nitride Coated drill bit set allows you to easily see the contents at a glance, so you can quickly find the right bit for the job. The clip latch ensures that the case stays securely closed, so you never have to worry about losing any of your bits.
The small bulk storage size of the DEWALT drill bit set fits inside the Small and Medium ToughCase Plus (sold separately), making it easy to transport and store your bits wherever you need them. This is ideal for organizing loose bits, so you can always find what you need when you need it. Whether you're working on a DIY project at home or a professional job site, the DEWALT drill bit set is an essential tool that you can count on.
The DEWALT drill bit set has a number of strengths, including its wide range of sizes, connectable accessory storage system, and durable tapered web design. It is also easy to transport and store thanks to its small bulk storage size. However, one potential weakness is that the Small and Medium ToughCase Plus is sold separately, so you may need to purchase it separately if you want to maximize the storage space of your bits.
- 21 different sizes of bits ranging from 1/16-inch to 1/2-inch
- Patented bit-bar design allows for easy removal of bits and customizable placement
- Clear lid of the Titanium Nitride Coated drill bit set allows you to easily see the contents at a glance
- Tapered web provides greater durability to reduce breaking
- Small bulk storage size fits inside the Small and Medium ToughCase Plus (sold separately)
- – Small and Medium ToughCase Plus is sold separately
Best Drill Bits For Hardened Steel FAQs
Can regular drill bits be used for drilling into hardened steel?
No, regular drill bits cannot be used for drilling into hardened steel. Hardened steel is a tough material that requires a specialized drill bit that is designed to withstand the high pressure and heat generated during the drilling process. Regular drill bits are made from high-speed steel or carbon steel and are not strong enough to drill through hardened steel without breaking or dulling quickly.
To drill into hardened steel, you need to use a drill bit made from cobalt, carbide, or diamond. These drill bits are much harder than regular drill bits and can withstand the high temperatures and pressures generated during drilling. They are also designed with specialized cutting edges that can cut through hardened steel without dulling or breaking.
It's important to use the right drill bit for the job to ensure that you get the best results and avoid damaging your tools or workpiece. So, if you need to drill into hardened steel, make sure to use a specialized drill bit that is designed for the task.
How do you prevent drill bits from overheating when drilling into hardened steel?
Drilling into hardened steel can be a tough job, and if not done properly, it can cause drill bits to overheat and even break. However, there are a few ways to prevent this from happening. Firstly, it is essential to use the right type of drill bit that is designed specifically for drilling into hardened steel. Carbide-tipped drill bits are the best option for this task as they are more heat resistant and durable.
Secondly, it is crucial to use proper drilling techniques to prevent the drill bit from overheating. This includes using a lubricant to cool down the drill bit and reduce friction. Applying a few drops of oil or coolant to the drill bit and the surface being drilled can significantly reduce the heat generated during the process.
Moreover, it is advisable to use a slower drilling speed to prevent the drill bit from getting too hot. Slower drilling speed means less heat is generated, and the drill bit can work more efficiently. It is also important to avoid applying too much pressure while drilling as it can cause the drill bit to overheat and break.
In summary, to prevent drill bits from overheating when drilling into hardened steel, use the right type of drill bit, apply lubricant, use slower drilling speed, and avoid applying too much pressure.
How do you sharpen drill bits for hardened steel?
Sharpening drill bits for hardened steel requires patience and precision. The first step is to select the appropriate sharpening tool, such as a bench grinder or a sharpening stone. It is important to use a tool that is specifically designed for sharpening drill bits, as using the wrong tool can damage the bit.
Next, the drill bit should be secured in a clamp or vise to prevent it from moving during the sharpening process. The cutting edge of the bit should be carefully ground down to remove any dull or damaged areas, taking care not to overheat the bit.
After grinding, the bit should be honed using a sharpening stone or diamond file to create a sharp, polished edge. This step is crucial for achieving a clean, precise cut in hardened steel.
Finally, the bit should be cleaned and inspected for any remaining damage or defects before being used. With practice and attention to detail, anyone can learn to sharpen drill bits for hardened steel and achieve professional-grade results.
What are the best drill bits for hardened steel?
When it comes to drilling through hardened steel, it is important to have the right drill bit to ensure efficient and effective results. There are a few types of drill bits that are known to work well with hardened steel.
One of the best drill bits for hardened steel is the cobalt drill bit. These are made from a high-speed steel material that contains cobalt, making them extremely durable and capable of withstanding high temperatures. Another option is the carbide drill bit, which is made from tungsten carbide and is known for its ability to maintain sharpness even after prolonged use.
Diamond-coated drill bits are also a great option for drilling through hardened steel. They are incredibly hard and can withstand high temperatures, making them ideal for tough drilling jobs. Lastly, titanium drill bits are another great option as they have a high heat resistance and can handle high-speed drilling.
In conclusion, choosing the best drill bit for hardened steel depends on the job you are undertaking and the type of steel you are drilling through. However, with the options mentioned above, you can rest assured that your drilling job will be completed efficiently and effectively.
What are the safety precautions to take when using drill bits for hardened steel?
When using drill bits for hardened steel, it is important to take necessary safety precautions to avoid accidents and injuries. Firstly, it is recommended to wear protective gear such as safety glasses, gloves, and a dust mask to prevent debris and metal shavings from entering your eyes, skin, or respiratory system.
It is also important to use the right type and size of drill bit for the job. Hardened steel requires a harder and more durable drill bit, such as a carbide-tipped or cobalt drill bit, to prevent the bit from breaking or wearing too quickly.
When drilling, it is important to keep the drill bit lubricated with oil or coolant to prevent overheating and to extend the life of the bit. Also, make sure to use a steady and controlled grip on the drill to prevent slipping or losing control.
Lastly, always make sure to unplug the drill when changing or adjusting the drill bit, and store the drill and drill bits in a safe and secure location away from children and pets. By following these safety precautions, you can ensure a safe and successful drilling experience on hardened steel.
What is the difference between cobalt and carbide drill bits for hardened steel?
Cobalt and carbide drill bits are two popular options when it comes to drilling through hardened steel. The main difference between these two types of drill bits lies in their composition and performance.
Cobalt drill bits are made of high-speed steel with added cobalt, which makes them more resistant to heat and wear. They are suitable for drilling through tough materials like stainless steel, cast iron, and high-temperature alloys. Cobalt drill bits are also more affordable than carbide drill bits, making them a popular choice among DIY enthusiasts and professionals on a budget.
On the other hand, carbide drill bits are made of tungsten carbide, which is a much harder and more durable material than high-speed steel. They are designed for drilling through extremely hard materials like hardened steel, ceramics, and composites. Carbide drill bits are also more expensive than cobalt drill bits, but they offer superior performance and longevity.
In summary, if you need to drill through relatively tough materials, cobalt drill bits will work just fine. However, if you want to drill through hardened steel or other extremely hard materials, carbide drill bits are the better choice.
What is the ideal size of drill bits for drilling into hardened steel?
The ideal size of drill bits for drilling into hardened steel largely depends on the thickness of the steel and the size of the hole required. In general, it is recommended to use high-speed steel (HSS) or cobalt drill bits for drilling into hardened steel. These types of drill bits are known for their durability and ability to withstand heat generated during drilling.
For thinner sheets of hardened steel, smaller drill bits ranging from 1/16 inch to 1/4 inch can be used. However, for thicker sheets of steel, larger drill bits ranging from 1/2 inch to 1 inch may be required. It is important to note that using a drill bit that is too small can cause it to break or wear out quickly, while using a drill bit that is too large can cause the drill to become unstable and potentially damage the material being drilled.
Ultimately, the ideal size of drill bits for drilling into hardened steel will depend on the specific project requirements and the user's experience and skill level. It is always recommended to consult the manufacturer's recommendations and use the appropriate safety equipment when drilling into hardened steel.
What is the lifespan of drill bits for hardened steel?
The lifespan of drill bits for hardened steel depends on various factors such as the quality of the drill bit, the type of steel being drilled, and the drilling conditions. Generally, high-quality drill bits made of cobalt, carbide, or diamond can last longer and perform better than those made of regular steel. The hardness of the steel being drilled also affects the lifespan of the drill bit. Harder steel requires a more durable and robust drill bit that can withstand the heat generated during the drilling process. The drilling conditions, such as the speed, feed rate, and coolant used, also play a crucial role in determining the lifespan of the drill bit. If the drill bit is used at high speeds or without proper lubrication, it can wear out quickly. Therefore, it is essential to choose the right drill bit, use it correctly, and maintain it properly to ensure a longer lifespan.
What is the maximum drilling speed for drill bits when drilling into hardened steel?
The maximum drilling speed for drill bits when drilling into hardened steel depends on several factors. The hardness of the steel, the size of the drill bit, and the type of drill bit all play a role in determining the maximum drilling speed. In general, it is recommended to start with a slower speed and gradually increase the speed as needed. It is important to use a high-quality drill bit that is specifically designed for drilling into hardened steel to ensure the best results. Generally, the maximum drilling speed for hardened steel ranges from 50 to 200 RPM (Rotations Per Minute). However, it is important to note that drilling at a high speed may cause the drill bit to become hot and wear out quickly. Therefore, it is important to monitor the drilling process and adjust the speed as necessary to prevent damage to the drill bit and ensure the best results.
What type of material is used to make drill bits for hardened steel?
Drill bits for hardened steel are made from a variety of high-performance materials that can withstand the high temperatures and extreme pressure generated during drilling. The most common materials used for making drill bits for hardened steel include high-speed steel (HSS), cobalt, carbide, and diamond-tipped bits.
HSS drill bits are made of alloy steel and are highly resistant to wear and tear. They are suitable for drilling softer metals and alloys, but not for hardened steel. Cobalt drill bits, on the other hand, are made of high-speed steel with added cobalt. They are more durable and can handle the heat generated by drilling through hardened steel.
Carbide drill bits are made of tungsten carbide and are highly resistant to wear, heat, and corrosion. They are ideal for drilling through hardened metals, including steel. Finally, diamond-tipped drill bits are the most durable and expensive option. They are made of high-strength steel with diamond particles on the tip, making them ideal for drilling through the toughest materials, including hardened steel.