When tackling projects involving robust materials, having the right tools is paramount. For anyone working with metal, especially challenging materials like steel, selecting the best metal drill bits for steel is crucial for efficiency, precision, and durability. Standard drill bits simply won’t cut it, leading to frustration, broken bits, and subpar results. This comprehensive guide reviews the top drill bits engineered to slice through steel with ease, providing you with the knowledge to make an informed decision for your workshop or job site.
Quick Product Comparison
Our Top 5 Best Metal Drill Bits For Steel Reviews – Expert Tested & Recommended
1. DEWALT 21-Piece Titanium Nitride Coated Pilot Point Drill Bit Set for Steel
The DEWALT 21-Piece Titanium Nitride Coated Pilot Point Drill Bit Set is an excellent choice for professionals and serious DIYers looking for reliable performance in steel. These bits are designed for precision and longevity, ensuring a cleaner hole every time. With their superior coating and pilot point, they stand up to the demands of daily use.
Key Features That Stand Out
- ✓ Titanium Nitride Coating for enhanced durability and reduced friction.
- ✓ Pilot Point tip starts on contact, preventing walking and ensuring cleaner, accurate holes.
- ✓ Designed for longer life, making it a cost-effective choice over time.
- ✓ Offers outstanding durability and reliability for consistent performance.
Why We Recommend It
We recommend this DEWALT set because of its robust construction and thoughtful design features. The Titanium Nitride coating significantly extends bit life, especially when drilling tough materials like steel. The pilot point is a game-changer for precise starts, eliminating the need for a center punch and ensuring a clean finish.
Best For
This set is best for tradespeople, mechanics, and avid DIY enthusiasts who frequently drill into various types of steel and other metals, requiring precision and long-lasting performance.
Pros and Cons
Pros:
- Exceptional durability due to Titanium Nitride coating.
- Pilot Point tip ensures accurate, walk-free starts.
- Suitable for a wide range of metal drilling applications.
- Comes in a convenient 21-piece set for versatility.
Cons:
- May be overkill for occasional light-duty users.
- The price point is higher 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: “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.Read more”
2. Crosstar M35 Cobalt Drill Bits for Hardened Metal and Stainless Steel, TiAlN Coated, Three-Flute
The Crosstar M35 Cobalt Drill Bits are engineered for tackling the toughest materials, including hardened metal and stainless steel. Featuring an M35 Cobalt High-Speed Steel core and a cutting-edge TiAlN coating, these bits offer industry-leading durability. Their unique three-flute design ensures rapid cutting and efficient chip removal.
Key Features That Stand Out
- ✓ M35 Cobalt High-Speed Steel construction with 5% Cobalt for extreme heat resistance and longevity.
- ✓ TiAlN Nano-coating (89HRC hardness) provides superior wear resistance and speeds up drilling.
- ✓ Special 3-flute design enhances cutting speed by 40% and improves chip removal, preventing clogging.
- ✓ 135° self-centering tip allows for immediate drilling without walking, even on hard surfaces.
- ✓ Outlasts standard bits by 5X when working with hardened steel.
Why We Recommend It
These Crosstar bits are our Editor’s Choice for their revolutionary design and exceptional performance on challenging materials. The combination of M35 Cobalt, TiAlN coating, and the triple-flute geometry makes them incredibly efficient and durable, significantly reducing breakage and drilling time in hardened steel and stainless steel.
Best For
These drill bits are ideal for professional fabricators, welders, and serious DIYers who frequently work with difficult-to-drill materials like hardened steel, stainless steel, and other high-strength alloys.
Pros and Cons
Pros:
- Superior durability and heat resistance due to M35 Cobalt.
- TiAlN coating provides excellent wear protection and faster drilling.
- Three-flute design ensures rapid material removal and prevents clogging.
- 135° self-centering tip eliminates the need for pilot holes.
Cons:
- Higher cost compared to standard HSS bits.
- May require proper cooling for maximum longevity in extreme applications.
Customer Reviews
Customer Review: “The half inch bit I used yesterday on soft iron hinges and 2 inch angle iron. Amazed how sharp these bits are! Never seen the most perfect curly shavings as it cut through the metal with ease. Don’t know how long these will last but boy am I impressed so far. These were used in a cordless drill.”
Customer Review: “The half inch bit I used yesterday on soft iron hinges and 2 inch angle iron. Amazed how sharp these bits are! Never seen the most perfect curly shavings as it cut through the metal with ease. Don’t know how long these will last but boy am I impressed so far. These were used in a cordless drill.”
3. Cobalt M35 Drill Bit Set for Hardened and Stainless Steel, 1/16 to 3/8 Inch
This Cobalt M35 Drill Bit Set offers an excellent balance of performance and value, making it our top budget pick for drilling hardened and stainless steel. Constructed from high-quality M35 Cobalt material, these bits boast exceptional hardness and a significantly longer lifespan compared to standard HSS bits. The full grinding process further enhances their wear resistance and sharpness.
Key Features That Stand Out
- ✓ Made from M35 Cobalt material, providing superior hardness (up to 67 HRC) for cutting faster.
- ✓ Up to 12 times longer life compared to average HSS titanium coated bits.
- ✓ Hardened Full Grinding Process increases wear resistance, sharpness, and overall durability.
- ✓ Ideal for stainless steel, cast iron, zinc alloy, titanium, and aluminum.
- ✓ Comes in a hard, thick plastic box with compartmentalized storage for organization and protection.
Why We Recommend It
For those seeking robust performance without breaking the bank, this Cobalt M35 drill bit set is an outstanding choice. Its M35 Cobalt composition ensures it can tackle difficult metals with ease, while the full grinding process maintains sharpness and extends tool life. The secure packaging also adds to its overall value and convenience.
Best For
This set is perfect for hobbyists, homeowners, and tradesmen who need durable and sharp drill bits for occasional to moderate use on hardened steel, stainless steel, and other demanding metals, offering great value for money.
Pros and Cons
Pros:
- Excellent performance on hardened metals at a competitive price.
- Significantly longer lifespan than standard HSS bits.
- Very sharp and durable due to M35 Cobalt and full grinding.
- Well-organized and protected in a sturdy storage case.
Cons:
- The range of sizes might be limited for some specialized tasks.
- While durable, extreme heavy-duty industrial use might benefit from more premium options.
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.”
4. DEWALT Drill Bit Set, 3-Flats Shank,14-Piece, 135 Degree Split Point, for Plastic, Wood and Metal
The DEWALT 14-Piece Drill Bit Set is a versatile collection designed for drilling a variety of materials, including metal, wood, and plastic. These high-speed steel bits feature a 135-degree split point tip, which significantly reduces walking and ensures precise hole starts. The tapered web design further contributes to their extreme durability and resistance to breakage.
Key Features That Stand Out
- ✓ 135 Degree Split point tip design minimizes walking for accurate starts.
- ✓ Made from High Speed Steel (HSS), suitable for drilling in plastic, wood, and metal.
- ✓ Tapered web design enhances durability and prevents bit breakage.
- ✓ 3-Flats Shank prevents bits from slipping in the chuck, ensuring stable drilling.
- ✓ Comes in a durable case for easy organization and transport.
Why We Recommend It
This DEWALT set is a great all-around option for those who work with multiple materials, including light to medium-gauge steel. The 135-degree split point is particularly effective for metal, while the 3-flats shank ensures a secure grip in your drill. It’s a reliable choice for general-purpose applications where versatility is key.
Best For
This drill bit set is best for homeowners, general contractors, and DIYers who need a versatile set of bits capable of drilling into various materials like wood, plastic, and common types of metal, including mild steel.
Pros and Cons
Pros:
- Versatile for use on multiple materials (metal, wood, plastic).
- 135-degree split point for precise and quick starts.
- 3-Flats Shank prevents slippage in the drill chuck.
- Durable High-Speed Steel construction.
Cons:
- Less specialized for hardened steel compared to cobalt bits.
- Coating is not as advanced as TiN or TiAlN, potentially limiting extreme heat resistance.
Customer Reviews
Customer Review: “I needed a reliable set of bits for a remodeling project that involved drilling through metal studs and old plumbing. This DEWALT set performed admirably, cutting through everything without dulling quickly. The no-slip shank is a huge plus.”
Customer Review: “Excellent general-purpose drill bits. I’ve used them on sheet metal, wood, and even some PVC. They stay sharp longer than cheap bits, and the split point really makes a difference for starting holes precisely. A solid addition to any toolbox.”
5. M35 Cobalt Metal Drill Bit Set for Steel: Durable, TiN Coated, 3-Flute Design
This M35 Cobalt Metal Drill Bit Set is engineered to revolutionize your drilling experience in steel and other metals. Combining the strength of M35 cobalt high-speed steel with a durable TiN coating and an innovative 3-flute design, these bits deliver superior performance. They are built for serious metalworking, offering faster penetration and extended tool life.
Key Features That Stand Out
- ✓ M35 Cobalt High-Speed Steel construction (5% cobalt) for enhanced durability and heat resistance.
- ✓ TiN (Titanium Nitride) Coating provides extra hardness, reduces friction, and extends bit life up to 3X.
- ✓ Special 3-Flute Design offers three cutting edges for faster material penetration and smoother operation.
- ✓ 125° split point tip ensures precise starts and prevents bit walking.
- ✓ Built specifically for metal, ensuring optimal performance and longevity.
Why We Recommend It
We highly recommend this set for its combination of premium materials and smart design. The M35 cobalt makes it incredibly tough, while the TiN coating further enhances its ability to cut through steel without overheating. The 3-flute design is a significant advantage, providing efficient chip evacuation and a faster, cleaner cut, making your drilling tasks smoother.
Best For
This set is an excellent choice for professionals and advanced DIYers who frequently encounter tough metal drilling tasks, including heavy-duty steel, stainless steel, and other demanding alloys, where speed and bit longevity are critical.
Pros and Cons
Pros:
- Exceptional durability and heat resistance from M35 Cobalt.
- TiN coating significantly extends tool life and drilling speed.
- Three-flute design ensures fast and clean cuts with excellent chip removal.
- 125° split point for accurate, walk-free drilling starts.
Cons:
- May be overkill or too expensive for very light-duty applications.
- The specific size range included needs to be checked for individual project needs.
Customer Reviews
Customer Review: “Finally, a set of drill bits for steel that actually works! I was struggling with some thick stainless steel, and these M35 cobalt bits with the TiN coating just powered through. The 3-flute design is noticeable, less grabbing and smoother drilling. Highly impressed.”
Customer Review: “These bits are fantastic for anyone serious about working with metal. I’ve put them through their paces on various types of steel, and they hold up incredibly well. The coating helps immensely with heat, and the precision of the cut is top-notch. Worth every penny.”
Complete Buying Guide for Best Metal Drill Bits For Steel
Essential Factors We Consider
Choosing the best metal drill bits for steel involves understanding several key characteristics. The material of the bit is paramount; High-Speed Steel (HSS) bits are common for general use, but for tougher steel, Cobalt (M35 or M42) drill bits are superior due to their heat resistance and hardness, as cobalt alloyed with HSS maintains its cutting edge at higher temperatures. Carbide-tipped bits offer even greater hardness but are more brittle and expensive, typically reserved for extreme applications.
Coatings like Titanium Nitride (TiN), Titanium Carbonitride (TiCN), or Titanium Aluminum Nitride (TiAlN) further enhance a bit’s performance. These coatings reduce friction, increase hardness, and extend tool life, especially when drilling steel. The point angle, often 118° for softer metals and 135° for harder materials like steel, affects how quickly the bit starts and its resistance to walking. A split-point tip (usually on 135° bits) is highly recommended for steel as it eliminates the need for a pilot hole and ensures accurate starts. Lastly, consider the shank type (round, hex, three-flats) to ensure compatibility with your drill chuck and prevent slippage during high-torque applications.
Budget Planning
When investing in metal drill bits for steel, it’s important to consider value over just the lowest price. While HSS bits are budget-friendly, they will dull quickly in hard steel, requiring frequent replacement and potentially costing more in the long run. Cobalt drill bits, though a higher upfront investment, offer significantly longer life and better performance in challenging metals. For professionals who regularly drill steel, the durability and efficiency of cobalt or coated HSS bits often justify the higher cost, leading to better long-term value. For occasional use on mild steel, a good quality HSS set with a TiN coating might suffice. Always weigh the frequency and intensity of your projects against the bit’s material and coating to determine the most cost-effective solution.
Final Thoughts
Ultimately, the “best” drill bit for drilling steel depends on your specific needs and the type of steel you’re working with. For general-purpose drilling, a good quality HSS bit with a titanium coating can get the job done. However, for hardened steel, stainless steel, or frequent drilling applications, investing in cobalt drill bits (M35 or M42) with advanced coatings like TiAlN will provide superior performance, durability, and a much more satisfying drilling experience. Always remember to use appropriate cutting fluid and proper drilling techniques to maximize bit life and ensure safety.
Frequently Asked Questions
Q: What type of drill bit is best for drilling steel?
A: For general steel, High-Speed Steel (HSS) bits with a Titanium Nitride (TiN) coating are effective. For hardened or stainless steel, Cobalt drill bits (M35 or M42) are highly recommended due to their superior heat resistance and hardness.
Q: Do I need to use cutting fluid when drilling steel?
A: Yes, absolutely. Using cutting fluid or oil is critical when drilling steel. It helps dissipate heat, lubricates the cutting edge, and flushes away chips, all of which extend the life of your drill bit and improve drilling efficiency and quality.
Q: What is a 135-degree split point tip, and why is it good for metal?
A: A 135-degree split point tip is a design feature where the cutting edge is split at the tip, creating two additional cutting lips. This design allows the bit to start drilling on contact without walking, eliminates the need for a pilot hole, and reduces the amount of force needed, making it ideal for hard materials like steel.
Q: Can I use regular HSS drill bits on stainless steel?
A: While you can technically use regular HSS bits on stainless steel, they will dull very quickly and generate a lot of heat, which can harden the stainless steel further (work hardening). For optimal results and bit longevity, it’s best to use cobalt drill bits designed specifically for stainless steel.
Q: How can I prevent breaking my drill bits when working with steel?
A: To prevent bit breakage when drilling steel, use consistent, firm pressure without forcing the bit, maintain a slow to moderate RPM, use cutting fluid, and ensure the workpiece is securely clamped. Also, choose the right bit material and size for the job, and clear chips frequently to prevent heat buildup and jamming.
Selecting the right metal drill bits for steel is a game-changer for any project involving this robust material. By understanding the different types, coatings, and design features, you can significantly improve your drilling precision, speed, and the lifespan of your tools. Our top recommendations provide a range of excellent options, from versatile HSS sets to specialized cobalt drill bits for hardened steel. Invest wisely in your tools, and you’ll find that even the toughest metal jobs become manageable. Click here to explore more options and find the perfect drill bits for your needs on Amazon!
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.
