Ever tried drilling into hardened steel and ended up with a broken drill bit? It’s frustrating, right?
Finding the best drill bits for hardened steel can be challenging. There are so many types, and choosing the wrong one means wasted time, money, and maybe even a ruined project. Many people get confused by all the different materials and coatings.
This guide will help you avoid those headaches. You’ll learn about the different types of drill bits best suited for hardened steel. We’ll explain what makes them special and how to choose the right one for your specific job. You’ll also learn about important factors like speed and coolant.
We’ll make choosing the right drill bit easy. Let’s dive in and discover the secrets to successfully drilling hardened steel!
Top 6 Best Drill Bits For Hardened Steel
1. DEWALT Titanium Nitride Coated Drill Bit Set, Pilot Point, 21-Piece (DW1361)
The DEWALT Titanium Nitride Coated Drill Bit Set (DW1361) is a 21-piece set perfect for DIYers and professionals alike. These drill bits boast a titanium nitride coating, making them incredibly durable and long-lasting. The pilot point design helps prevent walking and ensures accurate drilling every time. This set is a great value for the price, offering a wide range of sizes to tackle most drilling jobs.
What We Like:
- The titanium nitride coating makes these bits incredibly durable. They last a long time and resist wear.
- The pilot point design helps prevent the drill bit from slipping. This leads to cleaner, more accurate holes.
- This set includes a great variety of sizes. You’ll find the right bit for almost any project.
- The bits are made of high-quality steel. They feel strong and reliable in your hand.
- The price is competitive. You get a lot of value for your money.
What Could Be Improved:
- The case could be a bit sturdier. It might not survive many drops.
- A larger size range would be beneficial. Some users might need even smaller or larger bits.
Overall, the DEWALT DW1361 drill bit set is a fantastic choice for anyone needing a reliable and versatile set of drill bits. Its durability and accuracy make it a worthwhile investment.
This set offers great value and performance; you won’t be disappointed.
2. BOSCH CO14B 14-Piece Assorted Set with Included Case – Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal
The BOSCH CO14B drill bit set is a great choice for anyone who needs to drill into tough materials. This 14-piece set includes cobalt M42 drill bits, known for their strength and durability. The bits have a three-flat shank, making them fit securely into your drill. The included case keeps everything organized and easy to transport.
What We Like:
- These bits drill through stainless steel, cast iron, titanium, and light-gauge metal easily.
- The cobalt M42 material makes them incredibly strong and long-lasting.
- The three-flat shank design prevents slippage in the drill chuck.
- The included case protects the bits and keeps them organized.
- The set provides a variety of sizes, covering many common drilling needs.
What Could Be Improved:
- Some users reported the case could be sturdier.
- A larger set with more bit sizes would be helpful for some projects.
- The price point might be a little high for some budgets.
Overall, the BOSCH CO14B drill bit set offers excellent performance and value for money. It’s a solid choice for professionals and serious DIY enthusiasts. We recommend this set for its durability and performance.
3. toolant Cobalt Drill Bit Set for Metal and Steel (Pro), Titanium Aluminum Nitride Coated (TiAlN) with Bullet Point Tip, for Hardened Metal, Stainless Steel, 21pcs 1/16″-1/2″
The Toolant Cobalt Drill Bit Set is a great choice for anyone working with metal or steel. This 21-piece set includes drill bits ranging from 1/16″ to 1/2″, perfect for a variety of projects. The titanium aluminum nitride (TiAlN) coating makes these bits incredibly durable and long-lasting. The bullet point tip helps prevent walking and ensures accurate drilling. They’re designed to handle even hardened metals and stainless steel with ease.
What We Like:
- The TiAlN coating adds extra durability and longevity. These bits last a long time!
- The bullet point tip makes for precise drilling, minimizing slippage.
- The set includes a wide range of sizes (1/16″ to 1/2″), covering most common needs.
- They easily drill through tough materials like hardened steel and stainless steel.
- The overall value is excellent for the price. You get a lot of high-quality bits.
What Could Be Improved:
- The case could be slightly sturdier for better protection during storage and transport.
- A larger size range would be beneficial for some professional applications.
- More detailed instructions on using the bits for different materials would be helpful.
In short, the Toolant Cobalt Drill Bit Set offers excellent performance and value. It’s a worthwhile investment for DIYers and professionals alike.
These bits are strong, accurate, and a great addition to any toolbox.
4. NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals, with 1/4″ Hex Shank for Quick Chucks & Impact Drivers, SAE Sizes 3/32″-1/8″-3/16″-1/4″-5/16″ in Storage Case
This NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set is a great tool for working with tough materials. It includes five stubby drill bits in common SAE sizes (3/32″, 1/8″, 3/16″, 1/4″, and 5/16″). The bits are made from M35 cobalt steel, which makes them strong and long-lasting. Their 1/4″ hex shank fits most quick-change chucks and impact drivers. A handy storage case keeps the bits organized.
What We Like:
- These bits cut through stainless steel and hard metals easily.
- The stubby design gives you better control in tight spaces.
- The strong M35 cobalt steel makes them very durable.
- The 1/4″ hex shank works with many power tools.
- The included case keeps everything neat and safe.
- The price is reasonable for the quality.
What Could Be Improved:
- Some users reported slight variations in bit size.
- A longer set of bits would be helpful for some projects.
Overall, this NordWolf drill bit set offers excellent value for its price. It’s a reliable tool for anyone who needs to drill into tough materials regularly. We highly recommend it for home workshops and professional use.
5. DEWALT Drill Bit Set, 21-Piece, 135 Degree Split Point, 31 Degree Helix, Black Oxide Coated, For Plastic, Wood and Metal (DWA1181)
This DEWALT 21-piece drill bit set (DWA1181) is a great option for DIYers and professionals alike. It includes a variety of sizes, perfect for drilling into wood, metal, and plastic. The bits feature a 135-degree split point for accurate starts and a 31-degree helix angle for fast, clean drilling. The black oxide coating helps increase durability and prevents rust.
What We Like:
- The bits drill cleanly and accurately. They start easily and don’t wander.
- The black oxide coating adds to the bits’ lifespan. They resist wear and tear.
- This set offers a wide range of sizes, covering many common drilling needs.
- The case keeps the bits organized and protected. It’s easy to find the right bit.
- The DEWALT name means quality. You get a reliable product.
What Could Be Improved:
- The case could be a bit sturdier. It feels somewhat flimsy.
- Some users have reported breakage with heavier use. More robust materials might be beneficial.
- The price is a bit higher than some competitor sets. It’s a worthwhile investment though.
Overall, the DEWALT DWA1181 drill bit set provides excellent value for its price. It performs well and is a solid addition to any toolbox.
This set is a strong recommendation for those needing a versatile and durable drill bit collection.
6. M35 Cobalt Drill Bit Set 20PCS(1/16″-1/2″) High Speed Steel Jobber Length Drill Bit Kit for Hardened Metal with Index Storage Case
This M35 Cobalt Drill Bit Set is a great value for your money! It comes with twenty drill bits, ranging in size from 1/16″ to 1/2″, perfect for a variety of projects. These bits are made from high-speed steel and cobalt, making them strong enough to drill through hardened metals. The included index storage case keeps everything organized and easy to find.
What We Like:
- The drill bits are very durable and lasted through many uses.
- The case keeps the bits organized and easy to find. You can quickly grab the right size.
- The price is reasonable for the number of bits and their quality.
- These bits cut cleanly through tough materials.
- The set includes a good range of sizes, covering most common needs.
What Could Be Improved:
- The case could be a little sturdier. It feels a bit flimsy.
- Some users reported that a few bits were slightly dull out of the box. This was uncommon.
- More detailed instructions on using the bits on different materials would be helpful.
Overall, this M35 Cobalt Drill Bit Set offers excellent value. It’s a solid choice for anyone needing a versatile and durable set of drill bits.
We highly recommend this set for its performance and affordability.
Best Drill Bits for Hardened Steel: A Buyer’s Guide
Drilling hardened steel is tough. Regular drill bits just won’t cut it. You need special bits designed for the job. This guide helps you choose the right ones.
Key Features to Look For
- Material: The bit’s material is super important. Look for high-speed steel (HSS) or cobalt-alloy steel bits. These materials are strong and can withstand the high temperatures created when drilling hardened steel.
- Tip Geometry: The shape of the bit’s tip affects how well it cuts. Look for a split-point or a 135-degree split point design. These designs help the bit center itself and reduce the chance of it wandering or slipping.
- Coating: Some bits have coatings like titanium nitride (TiN) or titanium carbon nitride (TiCN). These coatings reduce friction, help the bit stay sharper longer, and make drilling easier.
- Shank Type: Make sure the shank (the part that fits into your drill) matches your drill. Common types are straight shanks and reduced-shank bits.
- Size and Length: Choose a bit size that’s right for your job. Longer bits are better for deeper holes.
Important Materials
High-speed steel (HSS) is a common choice. It’s tough and can handle the heat. Cobalt steel is even tougher and better for very hard steel. The coatings mentioned above add extra durability and performance.
Factors Affecting Quality
- Manufacturing Process: Bits made with precise manufacturing techniques will be more accurate and durable.
- Material Quality: The quality of the steel directly impacts the bit’s strength and lifespan. Better steel means a better bit.
- Coating Quality: A well-applied coating offers superior protection and performance.
- Heat Treatment: Proper heat treatment makes the bit harder and more resistant to wear.
User Experience and Use Cases
Drilling hardened steel requires careful technique. Use cutting oil or lubricant to keep the bit cool and prevent it from overheating. Go slow and apply steady pressure. Don’t force the bit; let it do the work. Hardened steel is used in many things, like tools, machinery parts, and dies. These drill bits are essential for working with these items.
10 Frequently Asked Questions
- Q: What’s the best drill bit material for hardened steel?
A: Cobalt steel or high-speed steel (HSS) with a coating is ideal. - Q: How important is the bit’s tip?
A: Very important! Split-point tips help prevent walking and improve accuracy. - Q: What’s the purpose of a coating?
A: Coatings reduce friction and extend the bit’s lifespan. - Q: Should I use cutting fluid?
A: Yes, absolutely! It keeps the bit cool and prevents damage. - Q: How fast should I drill?
A: Drill slowly and steadily. Avoid excessive pressure. - Q: What if my bit breaks?
A: Use the right bit for the job and always wear safety glasses. - Q: What are some examples of hardened steel applications?
A: Tools, machine parts, and dies are made of hardened steel. - Q: Are there different shank types?
A: Yes, straight shanks and reduced shanks are common. - Q: How do I choose the right bit size?
A: Choose a size that matches the hole you need to drill. - Q: Can I sharpen these bits?
A: It’s difficult and not always recommended. It’s often more economical to replace a worn bit.
Remember, safety first! Always wear safety glasses and appropriate hearing protection when drilling.
In conclusion, every product comes with its own unique set of features and benefits, and its value ultimately depends on your specific needs and preferences. We hope this review has helped you gain a clear understanding of whether this product aligns with your expectations. Remember, making an informed choice ensures you get the best experience possible.
If you have any questions or thoughts about this product, feel free to share them in the comments section. Your feedback not only helps us but also assists fellow readers in making better decisions. Thank you for reading.