What are the Best Drill Bits for Drilling Metal?

Struggling to find the perfect drill bit for metal? You're not alone.

Choosing the right drill bit can make all the difference when working with metal.

Don't give up yet—let's explore the best options together.

What Does HS on a Drill Bit Stand For?

Confused by drill bit markings? HS is key.

HS stands for High-Speed Steel, a crucial material for durable drill bits.

Understanding HS can improve your drilling efficiency.

High-Speed Steel (HS) is a type of tool steel that maintains its hardness at high temperatures. This makes HS drill bits ideal for drilling through tough materials like metal. When selecting a drill bit, seeing "HS" stamped on it indicates that the bit is designed to withstand the heat generated during drilling without losing its edge. This durability ensures cleaner holes and longer tool life, which is essential for both professional and DIY projects. Additionally, HS drill bits can be used at higher speeds compared to standard carbon steel bits, allowing for faster drilling with less effort. Whether you're working with stainless steel, aluminum, or other metals, choosing HS drill bits will enhance your performance and reduce the need for frequent bit replacements. Investing in quality HS drill bits ultimately saves time and money, providing a reliable solution for all your metal drilling needs.

Benefits of High-Speed Steel Drill Bits

• Durability¹: Resistant to wear and tear.
• Heat Resistance: Maintains hardness at high temperatures.
• Versatility: Suitable for various metals.

Comparison Table: HS vs. Cobalt Drill Bits

Feature	HS Drill Bits	Cobalt Drill Bits
Material	High-Speed Steel	HS with Cobalt added
Durability	High	Very High
Heat Resistance	Good	Excellent
Cost	Lower	Higher
Best Use	General metal drilling	Harder metals like stainless steel

Is It Safe to Use a Dull Drill Bit Through Metal?

Using dull bits? It’s risky and frustrating.

Drilling with a dull bit can cause accidents and poor results.

Let’s delve into why sharp bits are essential.

Using a dull drill bit on metal is not recommended. A dull bit requires more force to penetrate the material, increasing the risk of the bit slipping or breaking. This can lead to accidents, such as the drill bit snapping or causing the material to warp. Moreover, a dull bit generates excessive heat due to friction, which can damage both the drill bit and the metal being drilled. This overheating can result in rough, uneven holes and may compromise the integrity of the metal. Additionally, using a dull bit decreases drilling efficiency, making the task take longer and requiring more effort. To ensure safety and achieve clean, precise holes, always use sharp, high-quality drill bits. Regularly inspect your drill bits for signs of wear and replace them as needed to maintain optimal performance and safety during metalworking projects.

Risks of Using a Dull Drill Bit

• Increased Slippage²: Higher chance of the bit slipping off the workpiece.
• Overheating: Can damage both the bit and the material.
• Reduced Precision: Results in uneven or rough holes.
• Safety Hazards: Potential for accidents and injuries.

Maintenance Tips for Drill Bits

1. Regular Inspection: Check for signs of wear or damage.
2. Proper Storage: Keep drill bits in a dry, organized place.
3. Sharpening: Use a bench grinder to maintain sharp edges.
4. Cooling: Apply cutting fluid to reduce heat buildup.

How Do You Drill Through a Metal Hand Drill?

Struggling with metal drilling? Let’s fix that.

Drilling metal by hand requires the right technique and tools.

Here’s how to achieve clean, precise holes.

Drilling through metal with a hand drill involves several key steps to ensure success and safety. First, select the appropriate drill bit, preferably a high-speed steel (HS) or cobalt bit designed for metal. Secure the metal piece firmly using a vise or clamps to prevent movement during drilling. Mark the drilling spot accurately with a center punch to guide the drill bit and prevent it from slipping. Apply cutting fluid or oil to the drilling area to reduce friction and heat, which helps prolong the life of the drill bit and ensures a smoother drilling process. Begin drilling at a slow speed, applying consistent pressure without forcing the bit. Let the drill bit do the work, and periodically lift it out to clear any metal shavings and reapply cutting fluid as needed. As the hole begins to form, gradually increase the drilling speed while maintaining control. Once the hole is drilled through, deburr the edges for a clean finish. Using the correct technique and tools not only makes the process easier but also enhances the precision and quality of the drilled holes.

Essential Tools for Hand Drilling Metal

• Hand Drill³: Preferably a power drill with variable speed.
• Clamps or Vise: To secure the metal piece.
• Center Punch: For marking the drilling spot.
• Cutting Fluid: To reduce friction and heat.
• Deburring Tool: For finishing the drilled hole.

Step-by-Step Drilling Process

1. Select the Right Drill Bit: Choose HS or cobalt bits.
2. Secure the Metal: Use clamps or a vise.
3. Mark the Spot: Use a center punch.
4. Apply Cutting Fluid: Lubricate the drilling area.
5. Start Drilling: Begin at a slow speed.
6. Increase Speed: Gradually drill through the metal.
7. Deburr the Hole: Clean the edges for a smooth finish.

Can I Use a Metal Drill Bit to Drill a Concrete Wall?

Using the wrong bit? It won’t work.

Metal drill bits aren’t suitable for drilling concrete walls.

Let’s explore the right tools for the job.

Using a metal drill bit to drill into concrete walls is not recommended. Concrete is a much harder and denser material compared to metal, and it requires specialized drill bits designed to handle its toughness. Metal drill bits are not equipped to penetrate concrete effectively, which can lead to premature wear and breakage of the bit, as well as ineffective drilling results. Instead, use masonry drill bits, which have a different tip design with a carbide or tungsten carbide tip that is specifically engineered to grind through concrete and other masonry materials. Additionally, employing a hammer drill can significantly improve drilling efficiency in concrete by delivering rapid hammering action combined with the rotational motion, making it easier to create clean, precise holes. Using the appropriate drill bit and tool not only ensures better performance but also extends the lifespan of your equipment and achieves the desired results without unnecessary frustration or damage.

Why Metal Bits Fail on Concrete

• Inadequate Tip⁴ Design: Metal bits lack the carbide tips needed for concrete.
• Excessive Wear: Concrete’s hardness quickly dulls metal bits.
• Inefficient Drilling: Metal bits cannot effectively penetrate concrete.

Recommended Drill Bits for Concrete

• Masonry Drill Bits: Designed with carbide or tungsten carbide tips.
• SDS Drill Bits: Compatible with hammer drills for enhanced performance.
• Diamond-Tipped Bits: For extremely hard materials and precision drilling.

Best Drill Bits for Metal for 2025

Looking for top drill bits? I’ve got you covered.

In 2025, the best drill bits offer durability and precision for metalwork.

Here are my top picks for drilling metal this year.

Selecting the best drill bits for metal in 2025 involves considering several factors such as material, coating, and design. High-speed steel (HS) bits remain a popular choice due to their versatility and affordability, making them suitable for a wide range of metal types. However, for tougher metals like stainless steel or cast iron, cobalt drill bits are the superior option, offering enhanced heat resistance and durability. Titanium-coated bits are also highly recommended as they provide extended life and reduced friction, allowing for smoother drilling and less wear on the bit. Additionally, consider bits with a split point tip design, which reduces the likelihood of walking or slipping on the metal surface, ensuring more accurate and clean holes. Brands like DEWALT, Bosch, Tormek, Makita, Milwaukee, and TENYU TOOLS consistently receive high marks for their quality and performance. Investing in a set of these top drill bits will ensure you have the right tools for any metal drilling project, whether for professional use or DIY applications. Always match the drill bit type to your specific metal and drilling requirements to achieve the best results.

Top Drill Bit Recommendations for 2025

Brand	Type	Features	Best For
DEWALT	Cobalt	High durability, heat-resistant	Stainless steel, cast iron
Bosch	Titanium-Coated	Reduced friction, longer lifespan	General metal drilling
Tormek	High-Speed Steel	Versatile, affordable	Various metals
Makita	Carbide-Tipped	Superior hardness, precision drilling	Hard metals
Milwaukee	Cobalt-Titanium	Combines cobalt and titanium benefits	Heavy-duty metal projects
TENYU TOOLS	Customizable	Top quality, customizable logos, best cost	Wholesale, large-scale projects

Factors to Consider When Choosing Drill Bits

1. Material: HS, cobalt⁵, titanium-coated, or carbide-tipped.
2. Coating: Determines friction, heat resistance, and lifespan.
3. Tip Design: Split point for precision and reduced walking.
4. Size and Length: Appropriate for the specific drilling task.
5. Brand Reputation: Trusted brands often offer better quality and reliability.

Why Choose TENYU TOOLS

TENYU TOOLS stands out in 2025 for its exceptional quality and customization options. As a leading manufacturer based in China, TENYU offers top-quality drill bits that cater to both professional and industrial needs. With a focus on durability and precision, TENYU TOOLS provides drill bits that are not only reliable but also customizable with your logo, making them an excellent choice for wholesale and large-scale projects. Their extensive range of drill bits ensures that you have the right tool for any metal drilling task, backed by competitive pricing and excellent customer support. Whether you are a large company buyer, a hardware tools brand buyer, or a hardware tools distributor, TENYU TOOLS delivers products that meet high standards of quality and performance. By choosing TENYU TOOLS, you invest in drill bits that offer longevity, efficiency, and the flexibility to adapt to your specific business needs.

Advantages of TENYU TOOLS Drill Bits

• Top Quality: Manufactured with high-grade materials for superior performance.
• Customizable Logos: Perfect for branding and bulk orders.
• Competitive Pricing: Best cost without compromising on quality.
• Wide Range: Suitable for various metal types and drilling applications.
• Reliable Supply: Factory with 15 production lines ensures consistent availability.

What Kind of Oil Should I Use When Drilling in Metal?

Drilling metal without oil? It’s a mistake.

Using the right oil reduces friction and prolongs drill bit life.

Here’s the best oil for your drilling needs.

When drilling into metal, selecting the appropriate oil is crucial for ensuring smooth operation and extending the lifespan of your drill bits. Cutting oils, also known as machining fluids, are specifically formulated to reduce friction and dissipate heat generated during the drilling process. These oils help lubricate the drill bit, preventing it from overheating and maintaining its sharpness. There are several types of cutting oils available, including mineral-based oils, synthetic oils, and semi-synthetic blends. Mineral-based cutting oils are affordable and effective for general metal drilling tasks. Synthetic oils, on the other hand, offer superior lubrication and cooling properties, making them ideal for high-speed or heavy-duty drilling operations. Semi-synthetic oils provide a balance between performance and cost, suitable for a wide range of metal types and drilling conditions. Additionally, some cutting oils contain additives that help prevent rust and corrosion on both the drill bit and the metal workpiece. When applying cutting oil, ensure that you generously lubricate the drilling area before and during the drilling process to maximize effectiveness. Proper use of cutting oil not only enhances drilling performance but also ensures cleaner, more precise holes with minimal tool wear.

Types of Cutting Oils

• Mineral-Based Oils: Cost-effective and versatile.
• Synthetic Oils: Superior lubrication and cooling.
• Semi-Synthetic Oils⁶: Balanced performance and cost.
• Vegetable-Based Oils: Eco-friendly alternative.

Benefits of Using Cutting Oil

• Reduces Friction: Minimizes heat buildup.
• Prolongs Drill Bit Life: Prevents premature wear.
• Enhances Drilling Efficiency: Allows for smoother operation.
• Prevents Rust: Protects both the tool and workpiece.

Application Tips

1. Generous Application: Ensure the drilling area is well-lubricated.
2. Continuous Lubrication: Reapply oil during prolonged drilling sessions.
3. Clean After Use: Remove excess oil to prevent residue buildup.
4. Choose the Right Type: Match the oil to your specific drilling needs.

How to Drill Through a Metal Door?

Metal doors can be tough, but don’t worry.

Drilling through a metal door requires the right tools and technique.

Follow these steps for success.

Drilling through a metal door involves careful preparation and the use of appropriate tools to ensure a clean and accurate hole. Start by selecting a high-quality cobalt or high-speed steel (HS) drill bit, as these materials are designed to handle the hardness of metal. Mark the exact spot where you want to drill using a pencil or marker, and then create a small indentation with a center punch to guide the drill bit and prevent it from slipping. Secure the metal door firmly using clamps or a vise to keep it stable during the drilling process. Apply cutting oil or lubricant to the drilling area to reduce friction and heat buildup, which helps prolong the life of the drill bit and ensures a smoother drilling experience. Begin drilling at a slow speed, applying steady, moderate pressure without forcing the bit. Allow the drill bit to do the work, and avoid pushing too hard, which can cause the bit to overheat or break. Periodically withdraw the bit to clear any metal shavings and reapply cutting oil as needed. Once the hole is drilled through, remove any burrs or sharp edges with a deburring tool or file for a clean finish. Following these steps will help you drill through a metal door efficiently and safely, achieving precise and professional results.

Tools Needed for Drilling a Metal Door

• Cobalt or HS Drill Bit⁷: Suitable for metal.
• Center Punch: For marking the drilling spot.
• Clamps or Vise: To secure the door.
• Cutting Oil: To lubricate the drilling area.
• Deburring Tool: For finishing the hole.

Step-by-Step Guide

1. Select the Drill Bit: Choose cobalt or HS for durability.
2. Mark the Spot: Use a center punch for accuracy.
3. Secure the Door: Clamp or vise to prevent movement.
4. Apply Cutting Oil: Lubricate the drilling area.
5. Start Drilling: Begin at a slow speed with steady pressure.
6. Clear Shavings: Periodically remove metal debris.
7. Finish the Hole: Deburr for a smooth edge.

Safety Tips

• Wear Protective Gear: Safety glasses and gloves are essential.
• Maintain Control: Keep a firm grip on the drill to prevent slipping.
• Monitor Heat: Ensure the drill bit does not overheat by using cutting oil and pausing as needed.
• Secure the Workpiece: Prevent movement to avoid accidents.

Conclusion

Choosing the right drill bits makes metalworking efficient and safe.