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Metalworking
10 Tips to Drill through Metal Download ArticleExplore this Article IN THIS ARTICLE 1 Choose a drill bit based on the metal’s hardness. 2 Put on work gloves and safety glasses. 3 Clamp the metal to your workstation. 4 Mark the position of the hole with a pencil. 5 Make a dent on your mark with a center punch. 6 Apply cutting oil onto the indentation. 7 Drill through the metal at a slow, steady speed. 8 Stop drilling if the drill bit gets hot. 9 Reverse the drill bit out from the metal. 10 Remove sharp edges with a deburring tool. + Show 7 more... - Show less... Other Sections VideoWATCH NOW Tips and Warnings Related Articles Expert Interview References Article Summary Co-authored by Christopher Thomas and Hunter Rising
Last Updated: August 2, 2024 Fact Checked
Download Article ARTICLE VIDEO X
This article was co-authored by Christopher Thomas and by wikiHow staff writer, Hunter Rising. Christopher Thomas is a Metallurgist based in Birmingham, Alabama. With 16 years of experience working for Commercial Metals Company, Christopher specializes in designing modern infrastructure, metal recycling, fabrication, performance steel, and construction services. His company is responsible for creating high-end structures, from the AT&T Stadium in Dallas to the Pentagon. Christopher holds a BS in Metallurgical Engineering from the University of Alabama. There are 10 references cited in this article, which can be found at the bottom of the page. This article has been fact-checked, ensuring the accuracy of any cited facts and confirming the authority of its sources. This article has been viewed 316,837 times.
If you're tackling a DIY project that requires you to drill through metal, how can you know if you have the best tools for the job? Even if it may seem like a tough material to work with, you can easily drill through metal using a regular hand drill. Keep reading for everything you need to know and with a little patience, you'll be able to safely drill metal for any project!
Steps
1
Choose a drill bit based on the metal’s hardness.
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You’ll need a stronger bit when you’re drilling harder metals.[1]X Expert Source Ryaan TuttleHome Improvement SpecialistExpert Interview If you’re using your drill on a softer metal like aluminum, you can use a standard high-speed steel bit that you’d use on wood. If you’re drilling steel or another hard metal, use a cobalt, titanium, or carbide bit since they’re stronger.
If you need to make a hole that’s larger than 1 inch (2.5 cm), get a hole saw attachment for your drill instead.
Try a cone-shaped step bit if you’re working with thin sheet metal. Step bits also let you drill multiple sizes of holes without changing the bit.
A drill press will give you the most power to cut through the thickest metals, and you may be able to use one at a community workshop in your area.
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Put on work gloves and safety glasses.
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Gloves and safety glasses[2]X Expert Source Christopher ThomasMetallurgistExpert Interview protect you from sharp metal shavings. Drilling through metal can kick up small and sharp scrap pieces. Wear thick work gloves and a pair of safety glasses whenever you’re using your drill so you don’t get any nicks or cuts.
Wear a long-sleeved shirt with a closed collar to protect your arms and body too.
3
Clamp the metal to your workstation.
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Using clamps keeps the metal from moving around while you drill. It’s better to hold your tool with both hands when you drill metal. Secure the ends of the metal onto a sturdy work surface with your clamps so the piece doesn’t shift or move.[3]XResearch source
If you’re drilling a hole through thin sheet metal, sandwich it between 2 pieces of plywood so the edges stay flat and smooth.
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Mark the position of the hole with a pencil.
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Marking the metal ensures you drill in the right spot. Start the end of a tape measure on the edge of the metal and measure in to where you want to drill. Mark where you want the center of the hole to be with an X or a dot.[4]XResearch source
5
Make a dent on your mark with a center punch.
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An indentation prevents your drill bit from slipping.[5]X Expert Source Christopher ThomasMetallurgistExpert Interview Put the pointed end of a center punch on the mark you made in the metal. Tap the top of the center punch lightly with a hammer to make a small dent on the surface where you can place the end of the drill bit.[6]XResearch source
In a pinch, you can use a nail instead of a center punch.
Advertisement 6
Apply cutting oil onto the indentation.
Download Article
Using cutting oil adds lubrication so it’s easier to drill through metal. Drilling into metal makes a drill bit heat up, but the cutting oil cools it down and keeps it running smoothly. Dab a coin-sized amount of the oil into the divot you just made. Keep the oil nearby just in case you need to add more lubrication while you’re drilling.[7]XResearch source
Cutting oil also helps keep your drill bit sharp so it doesn’t dull as fast.
7
Drill through the metal at a slow, steady speed.
Download Article
A slow speed prevents the metal or drill bit from breaking or getting hot. Put the end of the drill bit into the divot and hold it perpendicular to your piece of metal. Hold the handle with one hand and put your other hand on top for extra support. Lightly squeeze the trigger to use your drill and push the bit down into the metal to start boring a hole through it.[8]XResearch source
You can use drill bits smaller than 1⁄16 inch (1.6 mm) up to a speed of 3,000 RPM. If you’re working with a drill bit that’s larger than 1⁄2 inch (1.3 cm), keep it around 1,000–1,500 RPM.[9]XResearch source
If you’re trying to drill a large hole in thick metal, start with a 1⁄4 in (0.64 cm) bit to make a pilot hole since it’ll be easier to cut out. Then, change the drill bit to the next size larger and drill through the hole again to widen it out.
Advertisement 8
Stop drilling if the drill bit gets hot.
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You’re more likely to damage a drill bit when it heats up. If the drill bit or piece of metal gets hot or starts glowing, let go of the trigger and let them cool down. While you’re waiting, squirt a few drops of cutting oil into the hole to lubricate the metal again.
9
Reverse the drill bit out from the metal.
Download Article
Reversing the drill bit makes it easier to pull it out. Find the switch on your drill that changes the direction your drill spins, and set it to reverse. Squeeze the trigger to back the drill bit out of the metal. As the drill bit spins, pull it straight up and out of the hole.[10]XResearch source
Advertisement 10
Remove sharp edges with a deburring tool.
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A deburring tool smoothes out edges so you don’t cut yourself. A deburring tool has small blades that shave off raised edges on metal. Put the point of the deburring tool into the hole and apply light pressure as you turn it. When you remove the tool, the edges of the hole will be smooth and safe to touch.[11]XResearch source
Collect metal shavings in a plastic bucket with a lid to recycle or take to a scrapyard.[12]XResearch source
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Tips
Submit a Tip All tip submissions are carefully reviewed before being published Name Please provide your name and last initial Submit Thanks for submitting a tip for review!
Warnings
Metal shavings are sharp, so clean them up with a brush or wear thick work gloves when you handle them. Thanks Helpful 2 Not Helpful 0
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Expert Interview
Thanks for reading our article! If you’d like to learn more about drilling metal, check out our in-depth interview with Christopher Thomas.
References
↑ Ryaan Tuttle. Home Improvement Specialist. Expert Interview
↑ Christopher Thomas. Metallurgist. Expert Interview
CT Co-authored by: Christopher Thomas Metallurgist This article was co-authored by Christopher Thomas and by wikiHow staff writer, Hunter Rising. Christopher Thomas is a Metallurgist based in Birmingham, Alabama. With 16 years of experience working for Commercial Metals Company, Christopher specializes in designing modern infrastructure, metal recycling, fabrication, performance steel, and construction services. His company is responsible for creating high-end structures, from the AT&T Stadium in Dallas to the Pentagon. Christopher holds a BS in Metallurgical Engineering from the University of Alabama. This article has been viewed 316,837 times. 15 votes - 87% Co-authors: 14Updated: August 2, 2024 Views: 316,837 Categories: Metalworking | Hole Making ToolsArticle SummaryX
Before drilling metal, choose the right kind of bit. For softer metals, like aluminum, a high-speed steel bit will work. For steel or other hard metals, use carbide, cobalt, or titanium. Put on a pair of work gloves and safety glasses, then clamp down the piece of metal to hold it steady while you drill. Draw an X on the metal where you want to drill, then make a dent on the mark with a hammer and center punch. Put a coin-sized amount of cutting oil on the spot to help lubricate and cool the drill bit. Hold the drill perpendicular to the metal and squeeze the trigger lightly while applying pressure to help push the bit through the metal. If the metal starts to glow or get too hot, take a break and add more cutting oil. Once you pierce the metal, switch the drill to reverse and carefully pull the bit out. Smooth the edges of the hole with a deburring tool when you’re done. Did this summary help you?YesNo
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Reader Success Stories
Dee Clark
Apr 17, 2017
"I now know I need a special bit for drilling metal and was told what kind. Thanks!"
More reader stories Hide reader stories Share your story If you buy through links on our site, we may earn a commission.
Did this article help you?
Yes No Advertisement If you buy through links on our site, we may earn a commission.Cookies make wikiHow better. By continuing to use our site, you agree to our cookie policy. CT Co-authored by: Christopher Thomas Metallurgist Co-authors: 14Updated: August 2, 2024 Views: 316,83787% of readers found this article helpful. 15 votes - 87% Click a star to add your vote
Dee Clark
Apr 17, 2017
"I now know I need a special bit for drilling metal and was told what kind. Thanks!"
Pamela Vizuete
Dec 7, 2017
"Great instructions that even I can understand. Thanks so much for the help." Share yours! More success stories Hide success stories
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Download Article Explore this Article IN THIS ARTICLE 1 Choose a drill bit based on the metal’s hardness. 2 Put on work gloves and safety glasses. 3 Clamp the metal to your workstation. 4 Mark the position of the hole with a pencil. 5 Make a dent on your mark with a center punch. 6 Apply cutting oil onto the indentation. 7 Drill through the metal at a slow, steady speed. 8 Stop drilling if the drill bit gets hot. 9 Reverse the drill bit out from the metal. 10 Remove sharp edges with a deburring tool. + Show 7 more... - Show less... Other Sections VideoWATCH NOW Tips and Warnings Related Articles Expert Interview References Article Summary Co-authored by Christopher Thomas and Hunter Rising 
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604 
You’ll need a stronger bit when you’re drilling harder metals.[1] If you’re using your drill on a softer metal like aluminum, you can use a standard high-speed steel bit that you’d use on wood. If you’re drilling steel or another hard metal, use a cobalt, titanium, or carbide bit since they’re stronger. 
Gloves and safety glasses[2] protect you from sharp metal shavings. Drilling through metal can kick up small and sharp scrap pieces. Wear thick work gloves and a pair of safety glasses whenever you’re using your drill so you don’t get any nicks or cuts. 
Using clamps keeps the metal from moving around while you drill. It’s better to hold your tool with both hands when you drill metal. Secure the ends of the metal onto a sturdy work surface with your clamps so the piece doesn’t shift or move.[3] 
Marking the metal ensures you drill in the right spot. Start the end of a tape measure on the edge of the metal and measure in to where you want to drill. Mark where you want the center of the hole to be with an X or a dot.[4] 
An indentation prevents your drill bit from slipping.[5] Put the pointed end of a center punch on the mark you made in the metal. Tap the top of the center punch lightly with a hammer to make a small dent on the surface where you can place the end of the drill bit.[6] 
Using cutting oil adds lubrication so it’s easier to drill through metal. Drilling into metal makes a drill bit heat up, but the cutting oil cools it down and keeps it running smoothly. Dab a coin-sized amount of the oil into the divot you just made. Keep the oil nearby just in case you need to add more lubrication while you’re drilling.[7] 
A slow speed prevents the metal or drill bit from breaking or getting hot. Put the end of the drill bit into the divot and hold it perpendicular to your piece of metal. Hold the handle with one hand and put your other hand on top for extra support. Lightly squeeze the trigger to use your drill and push the bit down into the metal to start boring a hole through it.[8] 
You’re more likely to damage a drill bit when it heats up. If the drill bit or piece of metal gets hot or starts glowing, let go of the trigger and let them cool down. While you’re waiting, squirt a few drops of cutting oil into the hole to lubricate the metal again. 
Reversing the drill bit makes it easier to pull it out. Find the switch on your drill that changes the direction your drill spins, and set it to reverse. Squeeze the trigger to back the drill bit out of the metal. As the drill bit spins, pull it straight up and out of the hole.[10] Advertisement 
A deburring tool smoothes out edges so you don’t cut yourself. A deburring tool has small blades that shave off raised edges on metal. Put the point of the deburring tool into the hole and apply light pressure as you turn it. When you remove the tool, the edges of the hole will be smooth and safe to touch.[11]