Best Drill Bits For Hardened Steel Bolts (2024 Update)
If you're looking for the best drill bits for hardened steel bolts, you've come to the right place. Choosing the right drill bits is crucial to ensure the drilling process goes smoothly and efficiently. However, it's not always easy to find the right ones. You need to consider several factors before buying any.
The first thing you need to consider is the material you'll be drilling through. Hardened steel bolts require drill bits made of a strong and durable material such as cobalt, carbide, or titanium. The size of the bit, the angle of the tip, and the flutes are also critical factors to consider. The best drill bit for hardened steel bolts will have an angled tip and sharp edges that can easily penetrate the surface.
Are you tired of constantly replacing broken bits? Do you want to avoid frustration during your next drilling project? If so, keep reading. In this article, we'll provide you with all the information you need to choose the best drill bits for hardened steel bolts. We'll guide you through the different materials, sizes, and specifications to help you make an informed decision. With the right drill bits, you'll not only save time and money but also achieve the desired results on your project. So, let's get started!
10 Best Drill Bits For Hardened Steel Bolts
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Ideal for drilling through hard metals, hardened stainless steel, and cast iron with three flute design for better accuracy.
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The product is ideal for drilling into hardened metal, stainless steel, cast iron, plastic, and wood.
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Ideal for drilling through stainless steel, hard metal, cast iron, plastic, and wood materials with high precision.
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The product is ideal for drilling through hard metals, stainless steel, cast iron, and various types of plastics.
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Ideal for drilling through tough materials with precision and speed while maintaining durability and longevity.
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The product is ideal for drilling into hard materials such as hardened metal, stainless steel, cast iron, wood, and plastic.
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The product is ideal for drilling holes with a conventional point, left-hand flute, and jobber length.
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The product is ideal for drilling through hard metals, stainless steel, plastics, and wood with its cobalt, high-speed steel bits.
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This drill bit set is ideal for mechanics and DIY enthusiasts looking for high-speed steel bits with reduced shanks.
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Ideal for drilling into hard metals, stainless steel, and cast iron with its three-flute design and HSS cobalt material.
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1. Lichamp Cobalt Drill Set: Power Through Tough Metal.
The Lichamp drill bit is a must-have tool for heavy-duty drilling in tough metals. It boasts a unique 3x flute design that clears chips and particles faster, making the drilling experience more efficient. This patent design enables the user to complete drilling tasks with ease and precision.
The drill bit is made from industrial-grade M35 high-speed steel with 5% cobalt, providing exceptional hardness for wear resistance. This high-quality material can withstand high temperatures of up to 1100 degreeF, ensuring durability and longevity.
This versatile drill bit is suitable for drilling in hard abrasive alloy metal, hardened stainless steel, or cast iron, making it a go-to tool for various applications. It is perfect for industrial and DIY projects alike.
The 135-degree split point tip and twist design of the Lichamp drill bit increases cutting speed and self-centering, preventing skating starts or walking. This design ensures smooth drilling and precise results.
The Lichamp drill bit comes in a pack of five, with a 3/8-inch diameter HSS drill bit in each pack. The round straight shanks make it easy to install and use with any standard drill. The well-organized clear PS case provides easy storage and transportation, keeping the drill bits organized and easily accessible.
2. Ultimate Metal And Wood Drill Set
Introducing a set of drill bits that is sure to impress even the most discerning of users – the High Speed Steel M35 Cobalt 5% Drill Bit Set. Made from top-notch materials, these drill bits boast a longer tool life when compared to ordinary drill bits, making them a smart and efficient choice for those who demand the best.
The drill bits feature a 135° split point with round straight shank, which helps prevent walking and ensures precise and faster drilling. Additionally, the fully ground twist design helps clear particles faster, decreases friction, and reduces heat for a cooler drilling performance. These characteristics make these drill bits ideal for a wide range of applications, particularly in cutting harden metals such as stainless steel, cast iron, high-temperature alloy, titanium alloy, hard plastics, and woods. They can also be used for softer materials.
The set includes 29 jobber length drill bits, ranging in size from 1/16" to 1/2" by 1/64" increments. This comprehensive set ensures that you have the right drill bit for any job you may encounter. Whether you're a DIY enthusiast or a professional contractor, these drill bits are perfect for anyone who needs high-quality tools that deliver exceptional results.
This product has a 100% satisfaction guarantee, so if you're not fully satisfied with your purchase for any reason, feel free to contact the manufacturer. They will do their best to assist you and ensure that you are completely happy with your purchase.
3. High-Speed Steel Drill Set For All Materials.
Introducing the ultimate drilling solution for professionals and DIY enthusiasts alike – the Premium 6% Cobalt Steel Drill Bit Set. With a remarkable Rockwell Hardness Scale of 69 HRC, these drill bits are designed to deliver the best heat, wear, and chip resistance, ensuring long-lasting tool life.
Crafted from high-quality cobalt steel, the cutting edge of each drill bit has been ground three times to ensure maximum hardness and heat resistance. This makes it the perfect tool for drilling through tough materials like stainless steel, hardened steel, iron, aluminum, pipes, wood, PVC, and plastics.
This heavy-duty cobalt drill bit is typically capable of running two to three times faster than other bits, making it a highly efficient option for drilling through materials. Despite the higher price point, the cost per hole when using cobalt drill bits will be the lowest, as they can produce so many more holes.
Thanks to their sufficiently sharp bit edge, these drill bits can cut through metal materials with ease, producing long strips of iron chips rather than slowly grinding through the material like a blunt drill bit. This makes them a superior choice for professionals and DIY enthusiasts who want to get the job done quickly and efficiently.
The 17-piece set includes drill bits in various sizes, ranging from 1/16" to 1/2". The 135-degree cobalt industrial HSS drill bits kit includes 1/16" (2pcs), 5/64", 3/32" (2pcs), 7/64", 1/8" (2pcs), 9/64", 5/32", 3/16", 7/32", 1/4" (2pcs), 5/16", 3/8", and 1/2". With this comprehensive set, you'll have the right drill bit for any job that comes your way.
4. Ultimate Cobalt Drill Set With Metal Storage
This drill bit set is a great addition to any toolbox, offering 29 sets of various sizes including 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64“, 3/8", 25/64", 13/32", 27/64", 7/16, 29/64, 15/32", and 31/64". The M35 cobalt drill bit is durable, robust, and sharp, making it suitable for cutting a variety of materials such as stainless steel, iron castings, copper, aluminum, plastics, and wood.
The cobalt drill bit set is designed for quick and efficient use, with a 135-degree point tip and twist design for faster cutting and self-centering to prevent walk-off. It also features faster chip and particle removal for smoother and quicker drilling. The HSS cobalt drill bit set for hardened steel offers excellent cutting performance, with 29 sets of drill bits for long-term use. The inserts are hardened and polished, enhancing sharpness and precise cutting without wobbling.
The drill set comes with drill holders that have size indexes, making it easy to store and sort the drill bits. The package is small yet sturdy, making it convenient to store in your toolbox or other storage areas. If you have any questions, the customer service team is always happy to help.
5. Golden Precision Drill Set For Pros
This set of 29 jobber length drill bits is a must-have for any professional or DIY enthusiast. The set includes inch sizes ranging from 1/16" through 1/2" in 1/64" increments, providing users with a range of options to tackle various drilling tasks.
Constructed from cobalt steel, these drill bits provide an extended tool life compared to high-speed steel drill bits when drilling hard materials. The gold oxide finish lubricates and provides wear resistance on ferrous materials, ensuring that the bits remain sharp and durable even after extended use.
Featuring a self-centering 135-degree split point, these drill bits penetrate hard material without a pilot hole, producing small chips that reduce clogging. The extra thick web provides increased strength and rigidity compared to standard drill bits, ensuring that the bits can withstand heavy use and maintain their performance over time.
Whether you're working with metal, wood, or other materials, this set of drill bits is a versatile and reliable option that will help you get the job done with precision and efficiency. With its high-quality construction and range of sizes, this set is an excellent investment for any professional or DIY enthusiast looking to take their drilling capabilities to the next level.
6. Ultra-Durable Drill Bit Set For Any Job
Introducing the 29 PCS M35 Twist Drill Bit Set, a comprehensive drill bit collection that includes 29 different sizes ranging from 1/16" to 1/2". This set is designed to meet all your drilling needs, making it an essential addition to your tool kit.
Crafted from high-speed steel M35 with a 5% cobalt content, these drill bits are capable of drilling through tough and high tensile materials, including stainless steel, cast iron, superalloys, titanium alloys, rigid plastics, and wood. The M35 drill bit is especially suitable for cutting hard metals, and it can also be used in soft materials.
Featuring a 135° split point with a round straight shank, these drill bits are self-centering, which prevents walking and ensures precise and faster drilling. The double back angle process and full grinding process are adopted for a fully ground process twist design that helps clear particles faster, decreases friction and heat, and delivers a cooler drilling performance.
The metal drill bit set comes in a portable iron case that can be hung anywhere for easy access and storage. Whether you're a professional woodworker, handyman, builder, or just taking on the occasional housing project as a relaxing hobby, this 29 piece cobalt drill bit set has everything you need to get the job done.
At BeHappy, customer satisfaction is our top priority. We take pride in our specialized tool products, and if you have any doubts about our products, you can always contact us, and we will be happy to help you solve any problem. Invest in the 29 PCS M35 Twist Drill Bit Set today and experience the convenience and efficiency that this comprehensive set has to offer.
7. Left-Handed Steel Drill Set – Improved Precision.
This set of 29 jobber length drill bits is a must-have for any professional or DIY enthusiast. With inch sizes ranging from 1/16" to 1/2" in 1/64" increments, it offers a comprehensive range of drill bits for all your drilling needs.
What sets this drill bit set apart is its left-hand helix, which allows for counterclockwise drilling and easy broken screw removal. This feature is particularly useful when dealing with stubborn screws or bolts that just won't budge.
Made from high-speed steel (HSS), these drill bits are exceptionally hard and wear-resistant, ensuring a long-lasting and durable performance. The uncoated (bright) finish is an untreated surface that can be used on a range of materials, especially soft metals.
The 118-degree conventional point is perfect for a range of drilling applications, making these drill bits a versatile addition to any toolbox. Plus, with the added benefit of being made in the USA, you can be confident in their quality and craftsmanship.
Whether you're a professional or a DIY enthusiast, this set of 29 jobber length drill bits is an essential tool for any project. With its comprehensive range of sizes, left-hand helix, and high-speed steel construction, it offers exceptional performance and reliability. Order yours today and experience the difference for yourself!
8. Cobalt Jobber Drill Set – Gmtools
The Perfect Drill Bits are a must-have for anyone looking for precision and accuracy in their drilling projects. These high-quality drill bits are made using a precision grinding process that ensures a clean surface and high grinding accuracy. The universal round drill shank is widely applicable to tool holding systems and can be tightly clamped for added stability.
Featuring a 135° split point and twist design, these drill bits are designed to penetrate quickly with less pressure, reducing walking and ensuring a fully ground drill bit with a sharp and durable cutting edge. The twist design also allows for clear chips to be produced faster, making drilling more efficient and reducing the risk of clogging.
The Perfect Drill Bits are made using enhanced M35 alloy material, which contains 5% cobalt alloy steel. This increases wear resistance and durability, making them perfect for use in a wide range of applications. These drill bits are made using industry grade 6542 high-speed steel, which is harder than the 4241 HSS used in other similar drill bit sets.
This set includes a comprehensive range of sizes, from 1/16 inch to 1/2 inch bits, making it suitable for a wide range of drilling applications. The set comes in a metal indexed storage case, making it easy to store and transport.
The manufacturers of the Perfect Drill Bits are committed to providing high-quality products and offer a 30-day money-back guarantee. If for any reason you are not satisfied with your purchase, please contact them for a full refund. With a 100% satisfaction guarantee, you can shop with confidence knowing that you are getting a quality product that will meet your needs.
9. Astro Tools Ts29 Onyx 29pc Turbostep Hss Reduced Shank Mechanics Length 1/16" – 1/2" Drill Bit Set
Introducing the revolutionary Spiral Fluted Patent Stepped-Tip Drill Bits, the ultimate solution for your drilling needs. These drill bits are designed to outperform any conventional drill bit in almost all materials, making them a must-have for any DIY enthusiast or professional.
The patented design of these drill bits eliminates the need for pilot holes and prevents bit walk, ensuring precise and accurate drilling every time. They excel in drilling through hard alloys, sheet metal, and imperfect parts that are difficult to start drilling into, making them versatile and reliable.
Crafted from heat-treated quality M2 High-Speed Steel and coated with Onyx oxide, these drill bits are built to last and prevent chip buildup, providing long-lasting performance. The precision ground design ensures a sharp and precise point that can handle any drilling task with ease.
These drill bits come with three-flat shanks, reduced shanks above 3/8", and mechanic's length, making them a perfect fit for cramped spaces and providing superior access. With these drill bits, you can be confident that you will get the job done quickly and efficiently.
10. 10pc Hss Cobalt Drill Bits For Hard Metal
The Lichamp drill bit boasts a unique three flute patent design that allows it to clear chips and particles faster, providing a more efficient drilling experience. Additionally, this drill bit is made from industrial grade M35 high-speed steel with 5% cobalt, offering a four times longer lifespan than other materials and withstanding temperatures up to 1100 degrees Fahrenheit.
This versatile drill bit is perfect for heavy-duty drilling in tough metals such as hard abrasive alloy metal, hardened stainless steel, or cast iron. Its 135-degree split point tip and twist design increase cutting speed while providing self-centering capabilities, preventing skating starts or walking.
The Lichamp drill bit features a 1/4" cobalt drill bit with round straight shanks. With the purchase, you receive ten drill bits that are 1/4-inch in diameter, all neatly organized in a clear PS case.
The Lichamp drill bit is a reliable and high-quality tool perfect for any metalworking project. Its unique design and durable materials make it a must-have addition to any tool collection. Whether you're a professional or a DIY enthusiast, the Lichamp drill bit is sure to provide smooth and efficient drilling every time.
Best Drill Bits For Hardened Steel Bolts FAQs
Can regular drill bits be used on hardened steel bolts, or do you need specialized ones?
Regular drill bits may not be able to drill through hardened steel bolts effectively. Hardened steel is a tough and durable material that requires specialized drill bits to penetrate through it. Regular drill bits are usually made of high-speed steel and are designed to drill through softer materials like wood, plastic, and soft metals.
To drill through hardened steel bolts, you will need to use a specialized drill bit such as cobalt, carbide, or diamond-coated drill bits. These drill bits are made of harder and stronger materials that can withstand the high temperatures and pressure generated when drilling through hardened steel.
Using regular drill bits on hardened steel bolts may result in the bits getting dull or even breaking, which can be dangerous. Therefore, it is recommended to use specialized drill bits designed for drilling through hardened steel bolts to ensure the job is done safely and effectively.
How do you know if a drill bit is specifically designed for hardened steel bolts?
To determine if a drill bit is specifically designed for hardened steel bolts, you need to check its hardness level and coating. The drill bits that are designed for hardened steel bolts are made of high-speed steel (HSS) or cobalt. These materials are harder than regular steel and can withstand the heat generated during drilling.
Additionally, the drill bit should have a coating that reduces friction and dissipates heat. The most common coatings used are titanium nitride (TiN) and black oxide. TiN coating is gold in color and provides excellent wear resistance, while black oxide coating is black and helps to reduce friction and increase durability.
You can also refer to the manufacturer's specifications or packaging to see if the drill bit is specifically designed for hardened steel bolts. They may mention the materials it can drill through or the specific applications it is suitable for.
In summary, to determine if a drill bit is designed for hardened steel bolts, check for its hardness level, coating, and manufacturer's specifications.
How do you maintain and sharpen drill bits for hardened steel bolts?
Maintaining and sharpening drill bits for hardened steel bolts is crucial to ensure that the drilling process is efficient and accurate. Here are some steps to follow:
1. Choose the right drill bit: Make sure to use a drill bit specifically designed for hardened steel bolts. High-speed steel (HSS) or cobalt drill bits are preferred for their ability to withstand the high temperatures generated during drilling.
2. Use a grinding wheel: Place the drill bit in a grinding jig and use a grinding wheel to sharpen the cutting edges. The grinding wheel should be fine-grained and diamond-tipped for best results.
3. Angle the drill bit correctly: When sharpening the drill bit, make sure to angle it correctly. The angle should be slightly less than 180 degrees, with a sharper angle for harder materials.
4. Check for burrs: After sharpening, check the drill bit for burrs or rough edges. Use a diamond file or honing stone to remove any rough spots.
5. Clean and lubricate the drill bit: Before using the drill bit, make sure to clean it thoroughly and apply a lubricant. This will help to reduce friction and heat during drilling, prolonging the life of the drill bit.
By following these steps, you can maintain and sharpen drill bits for hardened steel bolts, ensuring that your drilling tasks are accurate and efficient.
How important is the coating on drill bits for hardened steel bolts?
The coating on drill bits plays a crucial role in drilling hardened steel bolts. Hardened steel is a dense material that can be challenging to penetrate, and without the right coating, drill bits can quickly wear down or break during the drilling process.
Coatings such as titanium nitride (TiN), titanium carbonitride (TiCN), and titanium aluminum nitride (TiAlN) are popular choices for drill bits used for hardened steel. These coatings provide a layer of protection to the drill bit, reducing friction and heat generated during drilling. This helps to prolong the life of the drill bit and improve its overall performance.
Additionally, the coating can also improve the drill bit's ability to maintain its sharpness, enabling it to maintain its effectiveness for longer periods. This is especially important when drilling hardened steel bolts, which require a lot of force and pressure to penetrate.
In conclusion, the coating on drill bits is extremely important when it comes to drilling hardened steel bolts. It helps to protect the drill bit, reduce friction and heat, and maintain the bit's sharpness, resulting in efficient and effective drilling.
What are the best materials for drill bits to use on hardened steel bolts?
When it comes to drilling through hardened steel bolts, it's important to choose the right drill bit material for the job. The best materials for drill bits to use on hardened steel bolts are cobalt, carbide, and high-speed steel (HSS).
Cobalt drill bits are made from a mixture of cobalt and steel, making them extremely hard and heat-resistant. They are ideal for drilling through hardened steel bolts because they can withstand high temperatures and maintain their sharpness for longer periods.
Carbide drill bits are made from tungsten carbide and are known for their high heat resistance and durability. They are particularly effective for drilling through hardened steel bolts because they stay sharp even under high-stress conditions.
HSS drill bits are made from high-speed steel and are known for their ability to drill through tough materials like hardened steel. While not as durable as cobalt or carbide, HSS bits are more affordable and can still get the job done.
Ultimately, the best drill bit material for your needs will depend on the specific application and the level of hardness of the steel bolt. It's always a good idea to choose a high-quality bit from a reputable brand to ensure the best results.
What are the most common sizes of drill bits used for hardened steel bolts?
When it comes to drilling through hardened steel bolts, you need to use the right size of drill bit to ensure that the process is successful. The most common sizes of drill bits used for drilling through hardened steel bolts are 1/8 inch, 3/16 inch, 1/4 inch, 5/16 inch, and 3/8 inch. These sizes are chosen because they are suitable for the most common sizes of hardened steel bolts used in various applications.
It is important to note that the size of the drill bit used will depend on the size of the bolt being drilled. For instance, a smaller bolt will require a smaller drill bit while a larger bolt will require a larger drill bit. Additionally, it is important to use high-speed steel (HSS) drill bits when drilling through hardened steel bolts as they are designed to withstand the heat generated during the drilling process. Using the wrong size of drill bit or a drill bit made from the wrong material can result in damaging the bolt, the drill bit, or both.
What are the safety precautions to take when using drill bits on hardened steel bolts?
When using drill bits on hardened steel bolts, there are several safety precautions that must be taken to prevent accidents and ensure a successful outcome. Firstly, it is important to wear proper personal protective equipment (PPE) such as safety glasses, gloves, and a dust mask to protect yourself from flying debris and harmful dust particles.
Secondly, it is recommended to use a high-quality drill bit that is specifically designed for use on hardened steel. Using a dull or incorrect drill bit can cause the bit to break or become stuck in the bolt, leading to potential injury.
Thirdly, it is important to use the correct drilling speed and pressure to avoid overheating and damaging the bit. Using a lower speed and applying constant, even pressure can help to prevent the bit from overheating and breaking.
Lastly, it is important to secure the bolt firmly in place before drilling to prevent it from moving or spinning, which can cause the bit to slip and potentially cause injury. By following these safety precautions, you can safely and effectively use drill bits on hardened steel bolts.
What is the best technique to use when drilling through hardened steel bolts with drill bits?
When drilling through hardened steel bolts, it is essential to use the proper technique to ensure that the job is done efficiently and safely. Firstly, you should select the appropriate drill bit for the job, which should be a high-speed steel (HSS) or cobalt drill bit. Secondly, you should use cutting oil to lubricate the drill bit and prevent it from overheating. Thirdly, you should start drilling at a slow speed to create a pilot hole in the bolt. Once the pilot hole is created, you can increase the speed to drill through the bolt. It is important to keep the drill bit perpendicular to the bolt and apply downward pressure to prevent it from slipping. Finally, you should periodically remove the drill bit from the hole to clear any metal shavings and apply more cutting oil. By following these steps, you can efficiently and safely drill through hardened steel bolts.
What is the difference between cobalt and carbide drill bits for hardened steel bolts?
Cobalt and carbide drill bits are both popular choices for drilling hardened steel bolts, but they have some notable differences. Cobalt drill bits are made from high-speed steel with added cobalt, which increases their hardness and heat resistance. They are ideal for drilling through tough materials, such as stainless steel and cast iron. However, they may lose their sharpness quickly when drilling through hardened steel bolts.
On the other hand, carbide drill bits are made from tungsten carbide, which is a much harder and more durable material. They can easily drill through hardened steel bolts, making them the preferred choice for professionals who need to drill through tough materials regularly. Carbide drill bits also stay sharper for longer and can withstand high temperatures, making them ideal for use in high-speed drilling applications.
In summary, cobalt drill bits are suitable for drilling through tough materials, but they may not be the best choice for hardened steel bolts. Carbide drill bits, however, are specifically designed for drilling through hardened steel and can offer better performance and longevity.
What is the optimal angle for drill bits to use on hardened steel bolts?
When it comes to drilling hardened steel bolts, the optimal angle for the drill bit largely depends on the specific type of bolt you are working with. However, in general, a drill bit with a 135-degree angle is often recommended for use on hardened steel. This angle is known to provide a good balance of cutting power and durability, allowing you to drill through tough materials without wearing down the bit too quickly.
It is important to note that other factors can also impact the effectiveness of your drill bit, such as the size and shape of the bit itself, the speed at which you are drilling, and the amount of pressure you are applying. To ensure the best possible results, it may be helpful to consult with a professional or reference the manufacturer's specifications for the specific drill bit you are using.
Overall, drilling through hardened steel bolts can be a challenging task, but by selecting the right drill bit and using proper techniques, you can achieve the desired results with confidence.
