Ever tried to drill through something super tough, like hardened steel or strong alloys, and your regular drill bit just spun and got dull? It’s a common frustration for DIYers and pros alike! Choosing the right drill bit for hard metal isn’t just about picking one off the shelf; it’s about knowing what makes a bit capable of tackling those stubborn materials. Get it wrong, and you’ll waste time, money, and your patience.
This is where understanding the world of drill bits for hard metal becomes incredibly important. We’re going to dive into what makes these bits special, the different types available, and how to pick the perfect one for your project. By the end of this post, you’ll have the knowledge to confidently select a drill bit that cuts through hard materials like butter, saving you from those frustrating moments and ensuring your projects get done right.
So, let’s get started and discover the secrets to drilling through even the hardest metals with ease.
Our Top 5 Drill Bit For Hard Metal Recommendations at a Glance
Top 5 Drill Bit For Hard Metal Detailed Reviews
1. DEWALT Titanium Nitride Coated Drill Bit Set
Rating: 9.4/10
Tackle any drilling job with confidence using the DEWALT Titanium Nitride Coated Drill Bit Set. This 21-piece set, model DW1361, is built for serious DIYers and professionals alike, offering a wide range of sizes to handle diverse projects. The advanced titanium nitride coating makes these bits last much longer, so you won’t be replacing them as often.
What We Like:
- The titanium nitride coating means these bits stay sharp and last longer.
- The Pilot Point starts drilling right away, giving you cleaner holes without the bit wandering.
- No spin shanks keep the bits from slipping in your drill chuck, making drilling safer and more controlled.
- The tapered web design makes the bits stronger and less likely to break, even when you’re drilling through tough materials.
- You get a great selection of sizes, from tiny 1/16-inch bits to a large 1/2-inch bit, all organized in a handy plastic case.
What Could Be Improved:
- While the case is useful, it might not be the most heavy-duty option for constant job site use.
- For extremely demanding applications like drilling into hardened steel, you might need specialized bits.
This DEWALT drill bit set delivers excellent performance and durability for most common drilling tasks. It’s a reliable addition to any toolbox.
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
Rating: 8.6/10
Tackle tough metal drilling jobs with confidence using the BOSCH CO14B 14-Piece Assorted Set. This set features M42 Cobalt drill bits designed to power through stainless steel, cast iron, titanium, and even light-gauge metals. The special M42 alloy with 8% cobalt gives these bits a longer life, up to 10 times longer than regular bits. They can handle high heat, so you can drill for longer without worrying about them getting too hot. The thick design adds stability when you’re working with harder materials, and the hardened tip helps them cut through tough surfaces easily.
What We Like:
- Built with M42 Cobalt for superior durability and heat resistance.
- The 8% Cobalt alloy ensures these bits last much longer than standard ones.
- They can handle high temperatures, making them great for extended drilling.
- The thick web-helix design provides extra stability for tough jobs.
- The surface-hardened tip easily penetrates abrasive materials.
- The set includes a good range of sizes from 1/16″ to 1/2″ and comes with a case for storage.
What Could Be Improved:
- While the set is great for metal, it might be overkill for softer materials like wood.
- The price point might be higher than basic drill bit sets.
Overall, for anyone regularly drilling into harder metals, this Bosch set is a solid investment. It delivers the performance and longevity you need for a smooth drilling experience.
3. NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals
Rating: 8.8/10
Tackle tough metal drilling jobs with the NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set. These bits are designed for stainless steel and other hard metals. Their short size makes them ideal for tight spaces. The set includes common SAE sizes and fits easily into your drill.
What We Like:
- Made from strong M35 Cobalt steel for a long life.
- Stubby design lets you drill in hard-to-reach spots.
- 135° split point tip helps the bit center itself and drills fast.
- Works on stainless steel, cast iron, titanium, and aluminum.
- 1/4″ hex shank fits most drills and impact drivers.
- Comes with popular sizes: 3/32″, 1/8″, 3/16″, 1/4″, and 5/16″.
- The special case keeps bits organized and clearly labeled.
- The case has a hook for easy hanging on a pegboard.
What Could Be Improved:
- The set only includes five common sizes.
- For very deep holes, longer bits might be needed.
This NordWolf drill bit set is a solid choice for anyone needing to drill into tough metals. It offers durability and convenience for various projects.
4. Cobalt Drill Bit Set 10PCS
Rating: 9.4/10
Tackle your toughest drilling jobs with the Cobalt Drill Bit Set 10PCS. This kit features M35 cobalt drill bits, designed to power through hard metals like stainless steel and cast iron, as well as wood and plastic. The set includes 10 common sizes from 1/16″ to 13/64″, all neatly organized in a durable storage case.
What We Like:
- High-Quality Material: Made from M35 cobalt high-speed steel, these bits resist wear and heat, staying sharp longer.
- Upgraded Design: The 135° split point tip starts drilling quickly and prevents “walking” on harder surfaces.
- Fast & Efficient: Fully ground surfaces reduce friction for faster drilling. The double helix groove removes chips quickly, keeping your work clean.
- Convenient Storage: The included plastic case keeps your drill bits organized and protected, making them easy to find and carry.
- Versatile Sizes: Ten different sizes cover a wide range of common drilling needs for various projects.
What Could Be Improved:
- Limited Range: While the included sizes are useful, the set doesn’t cover larger drill bit requirements.
- Case Durability: The plastic storage case is functional but might not withstand heavy-duty workshop abuse over time.
This drill bit set offers excellent performance for its price. It’s a reliable choice for DIYers and professionals needing durable bits for tough materials.
5. DEWALT Drill Bit Set
Rating: 8.6/10
Tackle your projects with confidence using the DEWALT Drill Bit Set, 14-Piece, 135 Degree Split Point, For Plastic, Wood and Metal (DWA1184). This versatile set is designed for a wide range of tasks, making it a must-have for any DIY enthusiast or professional.
What We Like:
- The 135-degree split point tip helps the drill bit start on contact and stops it from “walking” or sliding around your material. This means cleaner, more accurate holes.
- Made from High Speed Steel, these bits can handle drilling into plastic, wood, and metal with ease.
- The tapered web design makes the bits extra strong and less likely to break, even during tough jobs.
- A black and gold coating protects the bits from rust and wear, so they last longer.
- The 3-flat shank grips firmly in your drill’s chuck, preventing the bit from spinning and losing its grip.
- You can quickly find the size you need thanks to the size markings directly on the drill bit shank.
What Could Be Improved:
- While the set is great for general use, some extremely hard metals might require specialized bits.
- The case is functional but could be a bit more robust for heavy-duty transport.
This DEWALT drill bit set offers excellent performance and durability for a variety of drilling needs. It’s a reliable choice that will help you get the job done right.
Choosing the Best Drill Bit for Hard Metal
Drilling into hard metals like stainless steel, hardened tool steel, or titanium can be tricky. You need the right drill bit to get the job done cleanly and efficiently. This guide will help you pick the perfect drill bit for your tough metalworking projects.
Key Features to Look For
When you’re buying a drill bit for hard metal, keep these important features in mind:
- Material: The type of metal the drill bit is made from is crucial.
- Coating: Some drill bits have special coatings that make them last longer and drill better.
- Flute Design: The spiral grooves (flutes) on the drill bit help remove chips and keep the bit cool.
- Point Angle: The sharp tip of the drill bit matters for starting the hole.
- Shank Type: This is the part that goes into your drill. It needs to fit securely.
Important Materials
The material of the drill bit is the most important factor for drilling hard metals.
High-Speed Steel (HSS)
HSS is a common material for drill bits. It’s strong and can handle heat. For harder metals, look for HSS bits that are cobalt-infused.
Cobalt (M35, M42)
Cobalt is added to HSS to make it even stronger and more heat-resistant. Cobalt drill bits are excellent for drilling through hardened steel and stainless steel. M35 and M42 are common grades of cobalt steel, with M42 being the stronger of the two.
Carbide
Carbide bits are the hardest and most heat-resistant. They are ideal for very tough materials and high-volume work. However, they can be brittle, so they need careful handling.
Factors That Improve or Reduce Quality
Several things can make a drill bit perform better or worse.
Improving Quality
- Cobalt Content: Higher cobalt content generally means better performance on hard metals.
- Heat Treatment: Proper heat treatment makes the bit harder and more durable.
- Sharpness: A very sharp point starts holes easily and reduces the chance of the bit slipping.
- Ground Flutes: Flutes that are ground into the metal are usually sharper and more precise than rolled flutes.
- Quality Coatings: Coatings like Titanium Nitride (TiN), Titanium Carbonitride (TiCN), or Black Oxide add hardness and reduce friction.
Reducing Quality
- Soft Materials: Using regular HSS bits on very hard metals will dull them quickly.
- Poor Sharpening: A dull bit will struggle, overheat, and can break.
- Cheap Manufacturing: Bits made with lower-quality materials or less precise manufacturing will not last as long.
- Incorrect Use: Using the wrong speed or pressure can damage the bit.
User Experience and Use Cases
Drill bits for hard metal are used by both professionals and serious DIYers.
Professional Use
Machinists, metal fabricators, and mechanics rely on high-quality cobalt or carbide bits for tasks like drilling into engine blocks, creating precise holes in machine parts, or working with stainless steel appliances.
DIY Projects
If you’re building a metal frame, working on car repairs, or even drilling through thick metal sheeting for a project, the right drill bit will save you time and frustration. You’ll find that a good bit makes the work much easier and gives you cleaner results.
Using the correct drill bit ensures your drill doesn’t overheat, the bit doesn’t break, and you get a clean hole every time. Investing in a good quality drill bit for hard metal is essential for success.
Frequently Asked Questions (FAQ)
Q: What is the best type of drill bit for stainless steel?
A: Cobalt drill bits (M35 or M42) are excellent for stainless steel. They can handle the heat and hardness of this material.
Q: Can I use a regular HSS drill bit on hardened steel?
A: You can try, but it’s not recommended. Regular HSS bits will dull very quickly and may even break. Cobalt or carbide bits are much better suited for hardened steel.
Q: What does the coating on a drill bit do?
A: Coatings like TiN or TiCN add a layer of hardness to the drill bit. This helps it cut through tough materials more easily, reduces friction, and makes the bit last longer.
Q: How fast should I drill into hard metal?
A: You should drill slower when working with hard metals. Too much speed creates heat, which can dull or damage the drill bit. Start slow and adjust as needed.
Q: Do I need a special drill for hard metal drill bits?
A: No, you can use most standard drills. However, a drill with variable speed control is very helpful for adjusting your drilling speed to suit the material.
Q: How can I tell if my drill bit is dull?
A: A dull drill bit will require more force to drill. It might also produce more heat, smoke, or shavings that are more like powder than curls.
Q: What is the difference between M35 and M42 cobalt drill bits?
A: M42 cobalt is a higher grade of cobalt steel than M35. It contains more cobalt, making it harder and more heat-resistant, which is better for drilling extremely hard metals.
Q: Should I use cutting fluid when drilling hard metal?
A: Yes, using cutting fluid or a lubricant is highly recommended. It helps to cool the drill bit and the workpiece, reducing friction and extending the life of your drill bit.
Q: Can I resharpen drill bits for hard metal?
A: Yes, you can resharpen them. However, it requires a specific drill bit grinding jig or a sharpening stone designed for metal. It’s important to maintain the correct point angle.
Q: How do I store my drill bits for hard metal?
A: Store them in a dry place, ideally in a drill bit organizer case. This prevents them from rusting and protects the sharp edges from damage.
In conclusion, every product has unique features and benefits. We hope this review helps you decide if it meets your needs. An informed choice ensures the best experience.
If you have any questions or feedback, please share them in the comments. Your input helps everyone. Thank you for reading.
Hi, I’m Tom Scalisi, and welcome to The Saw Blog! I started this blog to share my hands-on experience and insights about woodworking tools—especially saws and saw blades. Over the years, I’ve had the chance to work with a wide range of tools, and I’m here to help both professionals and hobbyists make informed decisions when it comes to selecting and using their equipment. Whether you’re looking for in-depth reviews, tips, or just advice on how to get the best performance out of your tools, you’ll find it here. I’m excited to be part of your woodworking journey!