Who Makes the Best Drill Bits for Metal: Top Brands Reviewed

Who Makes The Best Drill Bits For Metal

When you need to drill through metal, your choice of drill bit is critical. The right bit cuts cleanly, lasts longer, and keeps your work safe and efficient. But with so many brands and types, it’s easy to feel lost.

Which drill bits truly stand out for metalwork? Are the most expensive always the best? Or can you find quality without breaking your budget?

Many people think any drill bit can handle metal if you apply enough pressure. This is a myth. Metal is tough, and the wrong bit can dull quickly, snap, or even damage your tools. That’s why professionals and hobbyists alike seek the best drill bits designed specifically for metal.

In this guide, you’ll discover which brands lead the field, what materials and coatings matter most, how to spot real quality, and which common mistakes to avoid.

We’ll walk through the top brands, their strengths, and what sets them apart. You’ll also find detailed comparisons, practical tips, and answers to the questions most people ask before buying. Whether you’re drilling steel, aluminum, or tough alloys, this article will help you pick the best drill bits for metal—confidently and without regret.

What Makes A Drill Bit Good For Metal?

Not all drill bits are created equal, especially when it comes to metal. Here are the main factors that separate the best from the rest:

Material: High-Speed Steel (HSS), Cobalt, and Carbide are the top materials for metal bits. HSS is affordable and good for light jobs. Cobalt is tougher and handles harder metals. Carbide is the hardest, best for heavy-duty or industrial use.
Coating: Coatings like Titanium nitride (TiN) or black oxide help reduce friction and heat. This makes bits last longer.
Point Angle: Most bits for metal have a 135-degree split point. This design helps the bit start quickly and prevents wandering.
Flute Design: Flutes carry away metal shavings. Wider flutes are better for deep drilling.
Size Tolerance: Quality bits have precise diameters, important for tight-fitting holes.

Many beginners overlook the coating and point angle, but these can double or triple bit life. Also, not all “cobalt” bits are pure cobalt; most are alloyed with steel, so check the percentage (often 5-8%).

Top Brands That Make The Best Drill Bits For Metal

Some brands have become trusted names in metal drilling due to their commitment to quality and innovation. Let’s explore the leaders:

1. Dewalt

DEWALT is popular among both professionals and DIYers. Their cobalt and titanium-coated HSS bits are especially favored for metal.

Strengths: Reliable, widely available, and affordable. DEWALT’s Pilot Point technology reduces walking (slipping) and creates cleaner holes.
Popular sets: The DEWALT Cobalt Drill Bit Set (DWA1240) is a bestseller for stainless steel and cast iron.
Unique insight: DEWALT’s bits often feature a “no-spin shank” to prevent slipping in your drill chuck, which many people overlook but is crucial for safety.

2. Irwin Tools

IRWIN is known for high-performance bits, especially their “Cobalt M-35” series.

Strengths: Excellent for tough metals like stainless steel. Their 8% cobalt alloy bits last longer than many competitors’ 5% versions.
Popular sets: IRWIN 29-Piece Cobalt M-35 Metal Index Drill Bit Set.
Non-obvious tip: IRWIN’s “Turbo Point” tips start drilling instantly, reducing surface skidding, which many new users find frustrating with standard bits.

3. Bosch

Bosch offers German engineering and consistent quality.

Strengths: Durable, precise, and excellent for repeated use. Bosch’s bits stay sharp longer and often feature a split-point tip.
Popular sets: Bosch CO21 21-Piece Cobalt Metal Drill Bit Set.
Hidden gem: Bosch’s heavy-duty carbide-tipped bits are especially good for drilling through high-alloy steel, which is tricky for softer bits.

4. Milwaukee

Milwaukee is praised for innovation and durability, especially in demanding professional environments.

Strengths: Their Red Helix cobalt bits have a unique flute design for faster chip removal.
Popular sets: Milwaukee Red Helix Cobalt Drill Bits.
Unique insight: The variable flute design reduces heat buildup, which beginners often ignore but is vital for bit longevity.

5. Makita

Makita is a favorite for general-purpose use, balancing quality and price.

Strengths: Great for both home and light industrial use. Their titanium-coated bits are a good upgrade from basic HSS.
Popular sets: Makita B-65399 Impact Gold Titanium Drill Bit Set.
Non-obvious insight: Makita bits often include a 1/4″ hex shank, making them compatible with quick-change impact drivers, which saves time during projects.

6. Viking Drill & Tool

Less known to the public, but Viking is trusted by machinists and metalworkers.

Strengths: Made in the USA, tight tolerances, and premium M42 cobalt steel.
Popular sets: Viking Drill and Tool 02911 Type 240-UB 29-Piece Heavy-Duty Cobalt Drill Bit Set.
Pro tip: Viking’s focus on tighter diameter tolerances makes them ideal for precision metalwork.

7. Chicago-latrobe

Another brand favored in machine shops.

Strengths: High precision, long-lasting, and known for their 150 series M42 cobalt bits.
Popular sets: Chicago-Latrobe 150 Series Cobalt Steel Jobber Length Drill Bit Set.
Non-obvious benefit: These bits have a self-centering 135-degree split point, reducing the need for pilot holes.

8. Drill America

Drill America combines affordability with solid quality.

Strengths: Good cobalt bits for the price, especially for hobbyists or occasional use.
Popular sets: Drill America DWDCO Series Cobalt Steel Drill Bits.
Unique insight: Their bits come in “jobber length,” which gives a good balance of reach and stiffness—important for accurate holes in metal.

9. Norseman Drill & Tool

A hidden gem for those seeking premium performance.

Strengths: Superior M42 cobalt steel, highly polished flutes for smooth drilling.
Popular sets: Norseman Gold Oxide Magnum Super Premium Drill Bits.
Pro tip: Norseman’s bits are often chosen by professional fabricators for critical jobs where bit failure isn’t an option.

10. Comoware

COMOWARE is a newer brand but gaining traction for budget-friendly sets.

Strengths: Affordable, good for light metalworking and home projects.
Popular sets: COMOWARE Cobalt Drill Bit Set.
Caution: These are not for heavy-duty industrial use, but perfect for occasional drilling in softer metals like aluminum.

Who Makes the Best Drill Bits for Metal: Top Brands Reviewed

Credit: www.drillbitwarehouse.com

Comparing Top Metal Drill Bit Brands

To help you choose, here’s a direct comparison of key features among the leading brands:

Brand	Best For	Main Material	Coating	Price Range (USD)
DEWALT	DIY & Pros	Cobalt, HSS	Titanium, None	20–60
IRWIN	Tough Metals	8% Cobalt	None	40–80
Bosch	Precision	Cobalt, Carbide	None	30–70
Milwaukee	Heavy Duty	Cobalt	None	30–90
Makita	General Use	HSS	Titanium	15–40
Viking	Precision Work	M42 Cobalt	None	80–150
Chicago-Latrobe	Machine Shops	M42 Cobalt	None	90–160
Drill America	Hobbyists	Cobalt	None	25–60
Norseman	Premium Jobs	M42 Cobalt	Gold Oxide	100–180
COMOWARE	Budget	Cobalt	None	10–30

Drill Bit Materials Explained

Understanding the material is key before buying. Here’s what you need to know:

High-speed Steel (hss)

Best for: Mild steel, aluminum, and softer metals.
Pros: Affordable, easy to sharpen, good for general use.
Cons: Wears out faster on harder metals.

Cobalt (m35, M42)

Best for: Stainless steel, cast iron, titanium alloys.
Pros: Handles heat better, stays sharp longer, resists breaking.
Cons: More expensive, can be brittle if misused.

Carbide

Best for: Hardened steel, tough alloys, industrial jobs.
Pros: Longest life, stays sharp, excellent for production work.
Cons: Expensive, brittle (breaks if flexed), mostly for industrial use.

Comparison Of Drill Bit Materials

Here’s a breakdown to help you compare:

Material	Hardness (HRC)	Heat Resistance	Price	Ideal Use
HSS	62	Good	Low	General metal, aluminum
M35 Cobalt	66	Very Good	Medium	Stainless steel
M42 Cobalt	68	Excellent	High	Hardened steel
Carbide	75+	Excellent	Very High	Tool steel, alloys

Coatings And Their Importance

A good coating doesn’t just look cool—it makes a real difference.

Titanium Nitride (TiN): Gold-colored, reduces friction and heat. Can extend bit life by up to 2–3 times.
Black Oxide: Improves corrosion resistance and lubricity.
Gold Oxide: Used by brands like Norseman, offers additional hardness and easy identification.
No Coating: Bare cobalt or carbide bits are fine for heavy-duty use, but a coating is helpful for most users.

One mistake people make is thinking the coating is forever. In reality, coatings wear off with use, especially at the tip. But even a worn coating can help with heat resistance along the flutes.

What To Look For When Choosing Drill Bits For Metal

Before you buy, consider these key factors:

Type of Metal: Drilling stainless steel? Go for M42 cobalt or carbide. For aluminum, HSS or titanium-coated bits work fine.
Frequency of Use: Frequent drilling justifies investing in better bits like Norseman or Chicago-Latrobe.
Bit Size and Set: Do you need a full set or just a few sizes? A full set offers flexibility but costs more.
Shank Type: Round, hex, or reduced shank? Hex shanks are less likely to slip in cordless drills.
Budget: Don’t overspend if you rarely drill metal, but avoid the cheapest bits for important work.
Availability: Some high-end brands are only available online or through specialty stores.

Credit: www.protoolreviews.com

Real-world Performance: What Reviews And Pros Say

Looking at user reviews and professional feedback gives you a clearer picture.

DEWALT: Praised for value and accessibility. Many users report drilling hundreds of holes in mild steel with a single set.
IRWIN: Loved for stainless steel. Some report the bits outlasting others by 2–3 times in side-by-side tests.
Bosch: Noted for consistent size and sharpness, especially in CNC and workshop environments.
Milwaukee: Pros appreciate the fast chip removal, which keeps holes cleaner and bits cooler.
Viking and Norseman: These brands are often the “secret weapon” for machinists. Their bits are expensive, but users say they rarely break or dull, even after months of heavy use.

An interesting insight: Some experienced metalworkers keep two sets—one premium for tough jobs and a cheaper set for rough work. This helps avoid wearing out expensive bits on easy materials.

Common Mistakes When Choosing Or Using Drill Bits For Metal

Many beginners and even experienced users fall into these traps:

Using wood or masonry bits on metal: These won’t cut properly and can damage both the bit and your workpiece.
Choosing the wrong coating or material: For example, using HSS on hardened steel will dull the bit almost instantly.
Drilling too fast: High speed equals more heat, which ruins bits quickly. Always use a slower speed for metal.
Skipping lubrication: A few drops of cutting oil can double bit life.
Not securing the workpiece: Loose metal can spin dangerously and damage both the bit and drill.
Over-tightening the chuck: Can damage the shank and cause slipping.

How To Make Your Drill Bits Last Longer

You can get more value from your investment with these tips:

Use Lubricant: Apply cutting oil, especially on tougher metals.
Drill at the Right Speed: Lower speeds mean less heat and longer bit life.
Let the Bit Do the Work: Don’t force it—if it’s not cutting, sharpen or replace the bit.
Sharpen When Needed: A dull bit is dangerous and inefficient. Use a bench grinder or professional sharpener.
Store Properly: Keep bits dry and in their cases to prevent rust and damage.

Drill Bit Set Recommendations For Different Needs

Here are some recommendations based on real-world use:

For Home DIYers: DEWALT Titanium or Makita Titanium sets.
For Heavy-Duty Metalwork: IRWIN 8% Cobalt or Milwaukee Red Helix.
For Precision Jobs: Viking or Chicago-Latrobe M42 cobalt sets.
For Occasional Use: Drill America or COMOWARE cobalt sets.
For Professional Fabricators: Norseman Magnum Gold Oxide.

Practical Examples: Matching Bit To Metal

Let’s look at real scenarios:

Drilling 1/8″ holes in aluminum sheet for a car project: HSS or titanium-coated bits from Makita or DEWALT are perfect.
Making holes in 1/4″ stainless steel for a kitchen remodel: Use IRWIN or Viking M42 cobalt bits, with cutting oil.
Drilling hardened steel bolts: Carbide bits from Bosch or Norseman, slow speed, plenty of lubricant.

Real Data: Bit Life And Performance

A 2022 independent test by Project Farm compared leading cobalt bits on stainless steel. The IRWIN and Norseman bits drilled over 75 holes before dulling, while generic HSS bits dulled after fewer than 10 holes. This highlights the huge gap in performance between bargain and premium brands.

Credit: www.boomandbucket.com

Where To Buy The Best Drill Bits For Metal

Most top brands are available at hardware stores or online retailers. For high-end brands like Viking, Norseman, or Chicago-Latrobe, check industrial suppliers or order directly from their websites. Always buy from reputable sources to avoid counterfeits—a growing problem with popular brands.

For more technical details on drill bit materials and manufacturing, you can visit the Wikipedia page on drill bits.

Frequently Asked Questions

What Is The Difference Between Cobalt And Titanium Drill Bits?

Cobalt bits are made with a steel alloy that includes 5–8% cobalt, making them stronger and more heat-resistant. They’re best for hard metals like stainless steel. Titanium bits are usually HSS with a titanium nitride coating, which reduces friction and heat but eventually wears off. Titanium-coated bits are best for softer metals.

Can I Use Regular Wood Drill Bits On Metal?

No. Wood drill bits are not designed for metal. They will dull quickly, may break, and can cause rough or oversized holes. Always use bits made for metal, such as HSS, cobalt, or carbide.

How Do I Sharpen A Metal Drill Bit?

You can use a bench grinder or a dedicated drill bit sharpener. Hold the bit at the original angle and grind gently, keeping both sides even. For most users, replacing small bits is easier, but sharpening larger or expensive bits saves money.

Why Does My Drill Bit Keep Getting Dull So Fast?

Common causes include drilling too fast, using no lubricant, or choosing the wrong bit for the metal. Cheap bits also wear out quickly. Slow down your drill, use cutting oil, and select a quality cobalt or carbide bit for hard metals.

Are Expensive Drill Bits Really Worth The Cost?

For frequent or demanding use, yes. Premium bits like Norseman, Viking, or IRWIN last much longer, cut cleaner, and are less likely to break. If you only drill metal occasionally, mid-range brands like DEWALT or Bosch offer good value.

Choosing the best drill bits for metal isn’t just about the brand—it’s about matching the bit to your project, material, and budget. Investing in quality bits saves time, money, and frustration. Armed with this knowledge, you can drill into any metal with confidence and achieve professional results every time.