Finding the best metal drill bits for steel is crucial for any DIY enthusiast or professional craftsman. Steel, known for its strength and durability, requires specialized drill bits designed to withstand high temperatures and intense friction without dulling or breaking. This comprehensive guide reviews the top options available, helping you make an informed decision for your next project, ensuring efficient and precise drilling through various steel types, from mild to hardened varieties.
Quick Product Comparison
Our Top 5 Best Metal Drill Bits For Steel Reviews – Expert Tested & Recommended
1. DEWALT Titanium Nitride Coated Pilot Point Drill Bit Set for Steel, 21-Piece
This DEWALT 21-piece set is a powerhouse for anyone regularly drilling into various types of steel. Engineered with a titanium nitride coating and innovative pilot point tip, these bits are designed for superior longevity and precise starts. It’s a comprehensive set for diverse metalworking needs.
Key Features That Stand Out
- ✓ Titanium Nitride Coating for enhanced durability and reduced friction.
- ✓ Pilot Point Tip starts on contact, preventing walking and ensuring clean, accurate holes.
- ✓ Tapered Web Design increases durability and resists breakage.
- ✓ High-speed steel (HSS) construction suitable for steel, wood, and plastic.
Why We Recommend It
We recommend this DEWALT set for its excellent balance of durability, precision, and versatility. The pilot point tip is a game-changer for quick, accurate starts on steel, while the TiN coating ensures these bits last through tough jobs. It’s a reliable choice for both professionals and serious DIYers seeking quality metal drill bits.
Best For
Users who need a versatile, long-lasting drill bit set for frequent drilling in various metals, especially where precise hole starting is critical when working with steel.
Pros and Cons
Pros:
- Excellent durability thanks to Titanium Nitride coating.
- Pilot Point tip ensures accurate, walk-free starts.
- Versatile for use on steel, wood, and plastic.
- Tapered web design enhances strength and reduces breakage.
Cons:
- Not specifically cobalt, so may not perform as well on extremely hardened steel as M35/M42 bits.
- Higher price point than basic HSS sets.
Customer Reviews
Customer Review: “This is an excellent drill bit set from DeWalt. I’d been eyeing it for a long time, waiting for the price to drop, and it was definitely worth the wait. Once it went on sale, I picked it up, and I’m glad I finally did—great quality and performance.”
Customer Review: “I’ve used these bits on several steel projects, and they consistently deliver. The pilot point is fantastic, and they hold their sharpness well. Definitely recommend for anyone serious about metalwork.”
2. Crosstar M35 Cobalt Metal Drill Bits for Hardened Steel with TiAlN Coating and Three Flutes
The Crosstar M35 Cobalt drill bits are engineered for extreme durability and efficiency when tackling hardened steel. Featuring a robust M35 Cobalt core, a TiAlN coating, and a unique triple-flute design, these bits promise to cut faster and last longer in the toughest applications, making them among the best metal drill bits for steel.
Key Features That Stand Out
- ✓ M35 Cobalt High-Speed Steel for superior heat resistance and extended life in hardened metals.
- ✓ TiAlN Nano-coating (89HRC hardness) increases surface hardness and wear resistance.
- ✓ Special 3-Flute Design improves chip removal by 40%, preventing clogging and breakage.
- ✓ 135° Self-Centering Tip for precise, fast drilling without walking.
Why We Recommend It
This Crosstar set is an outstanding choice for anyone regularly drilling into seriously tough materials like stainless steel and hardened alloys. The combination of M35 cobalt, TiAlN coating, and the innovative triple-flute design makes these bits exceptionally fast and durable, minimizing effort and maximizing results on various forms of steel.
Best For
Professionals and serious DIYers who frequently work with hardened steel, stainless steel, or other challenging metals where standard bits fail.
Pros and Cons
Pros:
- Exceptional durability and heat resistance from M35 Cobalt.
- TiAlN coating provides extreme surface hardness for extended life.
- Triple-flute design ensures rapid chip removal and prevents clogging.
- 135° self-centering tip allows for precise starts and fast drilling.
Cons:
- Higher price point compared to standard HSS or TiN-coated bits.
- The specialized design might be overkill for softer materials.
Customer Reviews
Customer Review: “These Crosstar cobalt bits are an absolute beast! I drilled through 1/4″ stainless steel like butter, and the bits barely even got warm. The three-flute design really does make a difference in clearing chips. Highly impressed with their performance on hardened steel.”
Customer Review: “I’ve tried many different brands for drilling into heat-treated steel, but these Crosstar bits are a cut above. The TiAlN coating seems to do wonders for durability, and they stay sharp much longer than anything else I’ve used. Definitely worth the investment for tough jobs.”
3. toolant Cobalt Drill Bit Set for Metal and Steel , Titanium Aluminum Nitride Coated with Bullet …
The toolant Cobalt Drill Bit Set offers a comprehensive collection of titanium aluminum nitride coated cobalt bits designed for efficiency and durability when working with various metals, including steel. With 21 pieces and a specialized coating, this set provides a reliable solution for demanding drilling tasks, making it a strong contender for the best metal drill bits for steel on a budget.
Key Features That Stand Out
- ✓ Cobalt High-Speed Steel construction for increased hardness and heat resistance.
- ✓ Titanium Aluminum Nitride (TiAlN) Coating boosts surface hardness to 89HRC and heat resistance.
- ✓ Bullet Tip Design for faster penetration and reduced walking.
- ✓ 21-piece set offers a wide range of common sizes for versatility.
Why We Recommend It
For those seeking a budget-friendly yet capable set of cobalt drill bits for metal and steel, the toolant set delivers. The TiAlN coating and cobalt material provide a significant upgrade over standard HSS bits, making it a strong contender for various metalworking projects without breaking the bank.
Best For
DIYers and tradespeople on a budget who need durable cobalt drill bits for occasional to regular work on steel and other tough metals.
Pros and Cons
Pros:
- Excellent value for a cobalt drill bit set with TiAlN coating.
- Good heat resistance and surface hardness for drilling steel.
- Comprehensive 21-piece set covers most common drilling needs.
- Bullet tip design aids in fast and precise starts.
Cons:
- Brand might be less recognized than established names.
- Long-term durability compared to premium cobalt bits may vary.
Customer Reviews
Customer Review: “I was hesitant to try a lesser-known brand, but this toolant cobalt set really impressed me. I used them to drill through some fairly thick steel, and they performed admirably, staying sharp much longer than my old HSS bits. Great value for the money!”
Customer Review: “These bits are fantastic for the price! The TiAlN coating seems to work, as they cut smoothly through steel without much effort. The selection of sizes is perfect for my garage projects. Definitely recommend for budget-conscious buyers.”
4. Cobalt M35 High Speed Steel Drill Bit Set for Hardened Metal and Stainless Steel
This Cobalt M35 High Speed Steel drill bit set is specifically designed to tackle the most challenging drilling applications in hardened metals and stainless steel. Manufactured with a high-percentage cobalt alloy and undergoing a full grinding process, these bits are built for exceptional longevity and cutting performance, proving themselves among the best metal drill bits for steel.
Key Features That Stand Out
- ✓ M35 Cobalt Material (5% Cobalt) for superior hardness (up to 67 HRC) and heat resistance.
- ✓ Hardened Full Grinding Process increases wear resistance, sharpness, and overall durability.
- ✓ Up to 12 times longer life compared to average HSS titanium-coated bits.
- ✓ Suitable for stainless steel, cast iron, zinc alloy, titanium, and aluminum.
Why We Recommend It
When you need uncompromising performance on hardened metal and stainless steel, this M35 Cobalt set is an excellent investment. Its robust construction and full grinding process ensure consistent sharpness and impressive longevity, making tough drilling jobs much easier and more efficient.
Best For
Professionals and serious DIYers who frequently encounter very hard materials like stainless steel and require maximum durability and cutting efficiency from their drill bits.
Pros and Cons
Pros:
- Exceptional hardness and longevity due to M35 Cobalt content.
- Highly effective for drilling hardened metal and stainless steel.
- Full grinding process ensures consistent sharpness and durability.
- Well-organized and protected packaging for storage.
Cons:
- Higher cost compared to HSS or TiN-coated alternatives.
- May require slower speeds and cutting fluid for optimal performance.
Customer Reviews
Customer Review: “Good quality bits even though from offshore. Stay sharp for a long time.”
Customer Review: “Had a lug nut stripped. Only way off was to drill lug bolt. These bit eight right through it.”
5. DEWALT 14-Piece Drill Bit Set: Best for Drilling Steel and Tough Metals
The DEWALT 14-Piece Drill Bit Set is a reliable choice for general-purpose drilling in steel and other tough metals. Featuring a 135-degree split point tip and a robust tapered web design, these high-speed steel bits are built for durability and efficient hole creation, providing a solid option for those seeking the best metal drill bits for steel.
Key Features That Stand Out
- ✓ 135-Degree Split Point Tip Design reduces walking and allows for clean, accurate starts.
- ✓ High-Speed Steel (HSS) construction suitable for plastic, wood, and metal.
- ✓ Tapered Web Design for extreme durability and resistance to breakage.
- ✓ Black and gold coating helps reduce heat and friction.
Why We Recommend It
This DEWALT 14-piece set is a solid, go-to option for those who need reliable drill bits for steel and tough metals without the premium price tag of cobalt. The split point and tapered web design make them surprisingly durable and effective for a wide range of applications.
Best For
General contractors, homeowners, and DIYers needing a dependable set of drill bits for various tasks, including regular drilling into mild to medium-hard steel.
Pros and Cons
Pros:
- Reliable performance on steel, wood, and plastic.
- Split point tip prevents walking for accurate starts.
- Excellent durability due to tapered web design.
- Good value for a branded HSS set.
Cons:
- Not cobalt, so less effective on hardened or stainless steel compared to M35 bits.
- Case closure mechanism might be unconventional.
Customer Reviews
Customer Review: “I recently added the DEWALT 14‑piece drill bit set to my toolkit, and it’s been putting in the work. The split‑point tips drill cleanly without walking, making it easy to start holes in plastic, wood, and metal—all without a pilot drill. Made from high‑speed steel with a durable black-and-gold coati.”
Customer Review: “Amazing drill bits for the price!Have used on wood, metal, and plastic. Clean cutting, stayed sharp so far. The case has an odd closure, but otherwise I love these drill bits!”
Complete Buying Guide for Best Metal Drill Bits For Steel
Essential Factors We Consider
When selecting the best metal drill bits for steel, several critical factors come into play to ensure optimal performance and longevity. First, the material of the drill bit is paramount. High-speed steel (HSS) is a good general-purpose choice, but for tougher steels, cobalt (M35 or M42) drill bits are superior due to their heat resistance and hardness, as they contain 5-8% cobalt alloy. For even greater durability, look for bits with advanced coatings like titanium nitride (TiN), titanium aluminum nitride (TiAlN), or black oxide, which reduce friction, dissipate heat, and extend bit life. The tip angle, typically 135 degrees, is ideal for self-centering and preventing “walking” on hard surfaces. Consider the shank type (round, hex, or tri-flat) for compatibility with your drill chuck and to prevent slippage. Finally, the flute design, such as triple flutes, can improve chip removal and drilling speed, especially important when working with steel.
Budget Planning
Investing in quality metal drill bits for steel is a long-term decision. While cheaper sets might seem appealing, they often wear out quickly, leading to frustration and replacement costs. For occasional use on mild steel, a good quality HSS set with a TiN coating might suffice. However, if you frequently work with stainless steel, hardened alloys, or require high precision, opting for a cobalt drill bit set, despite its higher initial cost, will prove more economical in the long run. These bits offer superior durability and performance, reducing the need for frequent replacements. Look for sets that provide a good range of sizes, balancing cost with the specific needs of your typical projects. Remember, the best value isn’t always the cheapest, but the one that delivers consistent performance and lasts through demanding tasks.
Final Thoughts
Choosing the right drill bits for steel can significantly impact the success and ease of your metalworking projects. By understanding the differences in materials, coatings, and designs, you can select bits that not only perform exceptionally but also stand the test of time. Always prioritize safety, use appropriate cutting fluid, and maintain proper drilling techniques to extend the life of your bits and achieve clean, accurate holes every time. Our top recommendations are designed to tackle various steel applications, offering a blend of durability, precision, and value for both professionals and dedicated hobbyists.
Frequently Asked Questions
Q: What’s the difference between HSS and Cobalt drill bits for steel?
A: HSS (High-Speed Steel) drill bits are suitable for general-purpose drilling in softer metals and mild steel. Cobalt drill bits (M35 or M42), which are HSS mixed with 5-8% cobalt, are much harder and more heat-resistant, making them ideal for drilling through tougher materials like stainless steel, hardened steel, and cast iron. Cobalt bits retain their hardness at higher temperatures, extending their lifespan in demanding applications.
Q: Do I need to use cutting fluid when drilling steel?
A: Yes, absolutely. Using a proper cutting fluid or lubricant is highly recommended when drilling steel. It helps to cool the drill bit, reduce friction, prevent chip welding, and extend the bit’s life. This is especially critical for harder steels, where heat generation can quickly dull or even break an unprotected bit.
Q: What is a pilot point tip, and why is it good for drilling steel?
A: A pilot point tip is a drill bit design feature where the tip tapers down to a smaller, sharper point before the full diameter of the bit. This design allows the bit to start drilling precisely on contact without “walking” or wandering across the surface. For drilling steel, this means cleaner, more accurate holes right from the start, eliminating the need for a pilot hole in many cases and improving efficiency.
Q: Can I sharpen metal drill bits?
A: Yes, many metal drill bits, especially HSS and cobalt ones, can be sharpened. This requires a drill bit sharpener or a steady hand with a bench grinder. Properly sharpened bits can significantly extend their useful life, saving you money. However, specialized coatings like TiN or TiAlN will be removed from the sharpened edge, reducing some of their benefits.
Q: What drill speed should I use for drilling steel?
A: When drilling steel, it’s generally recommended to use a slower drill speed than what you might use for wood or softer metals. Slower speeds help to manage heat buildup and allow the bit to cut effectively without overheating or dulling prematurely. The exact speed depends on the drill bit size and the type of steel, but a good rule of thumb is lower RPMs for harder materials and larger bit diameters, coupled with firm, consistent pressure.
Choosing the right metal drill bits for steel is a decision that impacts the quality and efficiency of your work. Our comprehensive review highlights the top contenders, each offering unique strengths for various applications. Whether you prioritize extreme durability, precision, or value, there’s a perfect set for your needs. We encourage you to click on the links provided to explore these exceptional drill bits further and make an informed purchase. Elevate your metalworking projects with the confidence that comes from using the best tools for the job.
I’m Darrell Julian, the founder, lead writer, and hands-on welding enthusiast behind ArcWeldingPro.com. With more than 15 years of real-world welding experience, I created this platform to share what I’ve learned in the field, in the shop, and in the heat of the arc.
