How can I drill through metal with a drill?

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Forum topic by EricWrights posted 04-13-2011 03:58 AM 8935 views 1 time favorited 5 replies Add to Favorites Watch
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94 posts in 3249 days

04-13-2011 03:58 AM

Topic tags/keywords: drill metal

Do I need a special metal drilling bit or do I have to have a completely different tool?

I want to drill through a small piece of metal that is about 4mm thick to that I can lock my garden gate.

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5 replies so far

View gfadvm's profile


14940 posts in 2687 days

#1 posted 04-13-2011 04:01 AM

Use a sharp bit at slow speed and you should do fine.A drill press makes metal drilling much easier but may not work in your situation.Hope this helps.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View Jack_T's profile


623 posts in 3029 days

#2 posted 04-13-2011 04:05 AM

You should also use a lubricant to keep the bit cooler.

-- Jack T, John 3:16 "For God so loved the world that he gave his only Son, so that everyone who believes in him might not perish but might have eternal life."

View whit's profile


246 posts in 3974 days

#3 posted 04-13-2011 04:27 AM

You might also want to start with a smaller bit (.125) and work your way up to a larger size – depending on how large you need to drill. It’s a lot easier on the bits. If the metal isn’t attached to anything (like the gate or a post) make sure you have it well secured before you drill it; it will bite just as the bit breaks through the far side of the hole.


-- Even if to be nothing more than a bad example, everything serves a purpose. cippotus

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18269 posts in 3673 days

#4 posted 04-13-2011 07:32 AM

Like they say above use HSS drill, not black oxide or coated drill. If it is tough going, keep center punching the hole until you get through.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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Jim Finn

2656 posts in 2919 days

#5 posted 04-13-2011 10:20 PM

When drilling in metal keep the speed down and the pressure up. (A drill press helps with this) There should be large chips generated not fine powder when drilling.

-- Website is No PHD just a DD214 and a GED

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