Have you ever tried drilling through hardened steel? It’s like trying to cut through a rock with a butter knife! This tough material needs a special tool. Cobalt drill bits are the answer, but picking the right one can be tricky. You might end up with a dull bit, a ruined project, and a whole lot of frustration. It’s easy to get confused by all the different types and sizes.
Choosing the wrong drill bit wastes time and money. You might also damage your project. This is why it is important to know what to look for in a good cobalt drill bit. We will help you understand how to find the best drill bits for your needs. We will also explain how to use them correctly.
By the end of this post, you’ll be ready to tackle any hardened steel project. You’ll learn what makes cobalt drill bits special. You’ll also discover how to choose the best ones. Get ready to make your drilling jobs easier and more successful! Let’s dive into the world of cobalt drill bits!
Our Top 5 Cobalt Drill Bits For Hardened Steel Recommendations at a Glance
Top 5 Cobalt Drill Bits For Hardened Steel Detailed Reviews
1. 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: 8.7/10
The BOSCH CO14B is a 14-piece drill bit set. These bits are made for tough jobs. They are designed to drill into hard metals. This set is perfect for working with stainless steel, cast iron, titanium, and other metals. The set includes a case to keep the bits organized. The bits are built to last and handle high heat.
What We Like:
- Cobalt M42 drill bits last a long time.
- The bits have a high heat resistance.
- They are made for tough metals.
- The thick design keeps them steady.
- The hardened tip helps them cut.
- The set has many different sizes.
- The case keeps everything in order.
What Could Be Improved:
- Could be expensive for some users.
This BOSCH drill bit set is a great choice for professionals and DIYers. These bits are strong and can tackle tough projects. You will be happy with these drill bits.
2. GMTOOLS 13Pcs Cobalt Drill Bits Set
Rating: 8.7/10
Need drill bits that can handle tough materials? The GMTOOLS 13Pcs Cobalt Drill Bits Set is a great option. This set is made for drilling into hardened metal, cast iron, stainless steel, plastic, and wood. You get 13 different sized bits, from 1/16″ to 1/4″, all in a handy storage case. These bits are designed to cut quickly and accurately. They are perfect for many jobs.
What We Like:
- These drill bits use a precision grinding process. This gives you a clean surface and accurate holes.
- The 135-degree split point helps the bit start easily. It also prevents it from “walking” on the surface.
- The M35 alloy material is strong. These bits have 5% cobalt, making them wear-resistant.
- The set includes a range of common sizes. You’ll have the right bit for many projects.
- The included storage case keeps the bits organized.
- The company offers a 30-day money-back guarantee.
What Could Be Improved:
- Some users may prefer a wider range of sizes, but this set covers the most common needs.
The GMTOOLS drill bit set offers great value and performance. If you need a reliable set of drill bits for tough materials, this is a solid choice. You can drill with confidence knowing these bits are designed to last.
3. Sinyeenglon Cobalt Drill Bit Set for Hardened Metal and Stainless Steel
Rating: 8.6/10
The Sinyeenglon Cobalt Drill Bit Set is a heavy-duty set of drill bits. It is made for tough jobs. This 99-piece set is designed for hardened metal and stainless steel. These drill bits are made of M35 high-speed steel with cobalt. This set comes in a sturdy plastic case for storage.
What We Like:
- The M35 cobalt material is strong. It makes the bits cut faster. The bits will last a long time.
- These drill bits are fully ground. This makes them sharp and durable. They are good for many materials, including stainless steel and cast iron.
- The plastic storage case is well-designed. It keeps the bits organized. You can easily find the size you need.
- The set includes a wide range of sizes. You will have the right bit for most jobs.
What Could Be Improved:
- The product doesn’t mention if cutting fluid is included.
This drill bit set is a good choice for those who need to drill into hard materials. The set offers durability and convenience, making it a useful addition to any toolbox.
4. COMOWARE Cobalt Drill Bit Set- 15Pcs M35 High Speed Steel Twist Jobber Length for Hardened Metal
Rating: 9.3/10
Need a drill bit set that can handle tough materials? The COMOWARE Cobalt Drill Bit Set is designed for you. This set includes 15 drill bits made from M35 high-speed steel with 5% cobalt. They are made to drill through hard stuff like stainless steel, cast iron, and even wood and plastic. The set comes with a handy storage case to keep your bits organized. The bits are designed with a 135° split point to help prevent walking when you start drilling.
What We Like:
- The M35 cobalt steel is strong and lasts longer than regular drill bits.
- The twist design helps remove chips quickly and easily.
- The 135° split point helps the drill bit start accurately.
- These bits work well on hard materials like stainless steel and cast iron.
- The set includes a good range of sizes from 1/16″ to 3/8″.
- The storage case keeps the bits organized.
What Could Be Improved:
- While the set includes a good range of sizes, some users may need more sizes.
This COMOWARE Cobalt Drill Bit Set is a great tool for anyone who needs to drill into tough materials. The bits are made of good quality materials, and the set is easy to use.
5. DEWALT Cobalt Alloy Steel Drill Bit Set with Pilot Point
Rating: 9.1/10
The DEWALT Cobalt Alloy Steel Drill Bit Set (DWA1240) is a 14-piece set. This set is made for drilling into wood, metal, and even i-beams. It comes with features to help you keep your drill bits organized. The set is designed for easy storage and quick access. It is a good choice for both DIYers and professionals.
What We Like:
- The storage system helps you save space.
- You can easily remove and place the drill bits.
- The clear lid lets you see the bits.
- A clip latch keeps the case closed tightly.
- The case fits into other DEWALT ToughCase+ storage.
What Could Be Improved:
- The set only has 14 pieces.
- The ToughCase+ is sold separately.
This DEWALT drill bit set is a handy tool to have. It is a great choice for anyone needing to drill into different materials.
Cobalt Drill Bits for Hardened Steel: Your Buying Guide
Cobalt drill bits are tough. They are perfect for drilling into hard materials like hardened steel. If you need to drill into something super strong, cobalt is the way to go. This guide will help you pick the right cobalt drill bits.
Q: What are the main Key Features?
A: Look for these features when you buy cobalt drill bits:
- Cobalt Content: The amount of cobalt in the bit is important. More cobalt usually means a harder bit. Look for bits with 5% to 8% cobalt content. This makes the bit tougher.
- Point Angle: The point angle is the angle at the tip of the drill bit. A 135-degree point angle is common for hardened steel. This angle helps the bit bite into the metal. It stops the bit from wandering.
- Flute Design: Flutes are the grooves that run along the drill bit. They remove the metal shavings. Good flute design helps the bit drill faster and cleaner.
- Shank Type: The shank is the part that goes into your drill. Choose the right shank for your drill. Common shank types are round and hex.
- Surface Treatment: Some bits have a surface treatment. This might be a black oxide or titanium nitride (TiN) coating. These coatings can make the bit last longer. They can also reduce friction.
Q: What are the important materials?
A: Cobalt drill bits are made from special materials. The most important is:
- High-Speed Steel (HSS): HSS is the base metal. It’s strong and can handle heat.
- Cobalt: Cobalt is added to the HSS. It increases the hardness and heat resistance.
- Coatings (Optional): Some bits have coatings like black oxide or TiN. These coatings help the bit last longer.
Q: What factors improve or reduce quality?
A: Several things affect the quality of a cobalt drill bit:
- Cobalt Percentage: Higher cobalt content usually means a better bit.
- Manufacturing Process: Good manufacturing creates a better bit. Look for bits made by a reputable company.
- Heat Treatment: Proper heat treatment makes the bit stronger.
- Sharpness: A sharp bit will drill better. Check the sharpness of the cutting edges.
- Coating Quality: If the bit has a coating, the quality of the coating matters. A good coating reduces friction and wear.
Q: What is the user experience and use cases?
A: Using cobalt drill bits is different than using regular bits. Here is what you need to know:
- Use Cases: Cobalt drill bits are great for:
- Drilling hardened steel
- Drilling stainless steel
- Drilling other hard metals
- Drilling Speed: Drill slower than you would with regular bits.
- Coolant: Use cutting oil or coolant. This helps reduce heat and wear.
- Pressure: Apply steady pressure. Don’t force the bit.
- Starting the Hole: Use a center punch to start the hole. This prevents the bit from walking.
- Maintenance: Keep your bits sharp. Sharpen them when they become dull.
Q: Can I use cobalt drill bits on wood?
A: Yes, you can use cobalt drill bits on wood. However, it’s not usually necessary. Cobalt bits are designed for hard metals. Regular drill bits work fine for wood. Using a cobalt bit on wood can be overkill. You might damage the wood if you drill too fast.
Q: How do I choose the right size cobalt drill bit?
A: Pick the right size bit for the job. Measure the hole you need. Check the drill bit sizes available. Match the bit size to your needs.
Q: How do I sharpen a cobalt drill bit?
A: Sharpening a cobalt bit is tricky. You need a special grinder. You should also know how to grind the correct angles. If you are not comfortable, take your bits to a professional. They can sharpen them for you.
Q: What is the difference between cobalt and titanium drill bits?
A: Both are for hard materials. Cobalt bits are good for hardened steel. Titanium bits are good for general metalworking. Cobalt is often more expensive. Both are better than regular steel bits.
Q: How do I make my cobalt drill bits last longer?
A: Follow these tips:
- Use coolant or cutting oil.
- Drill at the right speed.
- Apply steady pressure.
- Don’t overheat the bit.
- Sharpen the bit when it gets dull.
- Store the bits properly.
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!