How to Drill Into Metal

Drilling into metal requires a different approach than wood or drywall. Metal is harder, generates more heat, and can cause bits to wander if you're not careful. With the right bits, speed settings, and technique, you'll get clean, accurate holes without breaking bits or damaging your workpiece.

What You'll Need

• Cordless or corded drill with variable speed
• HSS (High-Speed Steel) drill bits — designed for metal
• Cutting oil or lubricant — reduces heat and extends bit life
• Center punch and hammer — to mark and indent the starting point
• Clamps — to secure the metal workpiece
• Safety goggles and work gloves

Choosing the Right Drill Bit for Metal

Use HSS (High-Speed Steel) bits for most metals including steel, aluminum, copper, and brass. For harder metals like stainless steel, use cobalt bits. The DEWALT Screwdriver Bit Set (DWA2FTS100) includes drill bits suitable for light metal work and is a great all-around kit. Check it on Amazon →

For your drill, the DEWALT 20V MAX Cordless Drill Kit (DCD771C2) provides the variable speed control needed for clean metal drilling. Check it on Amazon →

Step-by-Step: How to Drill Into Metal

1. Mark your spot with a marker.
2. Use a center punch: Place the punch on your mark and tap with a hammer to create a small indent. This stops the bit from wandering when you start drilling.
3. Secure the metal with clamps — never hold metal freehand while drilling.
4. Apply cutting oil to the drill point — this reduces heat and friction significantly.
5. Set your drill to low speed — slower speed = less heat = longer bit life and cleaner holes.
6. Start drilling at the indent with light pressure. Let the bit cut at its own pace.
7. Apply steady, moderate pressure — don't force it.
8. Add more cutting oil as you drill, especially for thicker metal.
9. For thick metal: Start with a small pilot hole (2–3mm), then step up to your final size.
10. Deburr the hole after drilling — use a larger bit or deburring tool to remove sharp edges.

Speed Guide by Metal Type

• Aluminum: Medium-high speed
• Mild steel: Low-medium speed
• Stainless steel: Very low speed, more cutting oil
• Copper/Brass: Medium speed

Safety Tips

• Always wear safety goggles — metal shavings are sharp and fly fast. DEWALT DPG84 Goggles →
• Wear work gloves — metal edges and hot chips are hazardous. HANDLANDY Work Gloves →
• Never hold the workpiece freehand — always clamp it
• Don't touch the bit or workpiece immediately after drilling — both get very hot

Common Mistakes to Avoid

• Using wood bits on metal — they'll dull instantly
• Drilling too fast — generates heat that ruins bits
• Skipping the center punch — the bit will wander
• Not using cutting oil on steel
• Holding the metal freehand — it can spin and cause injury