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Reply by Iamjacob

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Posted on Can You drill any steel??

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Iamjacob

48 posts in 3676 days


#1 posted 02-21-2017 08:52 PM

Most likely you need to slow down. You almost cant drill too slow as long as you aren’t stalling to motor of your drill. Use of a drill press is best as you can use the slower pulleys but a hand drill will work.

When drilling steel you absolutely need to be pushing hard enough to be removing metal as the bit turns. If you are not removing metal as the bit is turning then you are rubbing the cutting edge of the drill bit and rapidly dulling it.

When drilling metal, you really do get what you pay for when it comes to drill bits. If you got your drill bits from harbor freight then don’t expect to get very far with them. Good quality drill bits will turn mild steel into swiss cheese with little effort.

jbay is correct. Start with a pilot hole and then step up in bit size. Make sure the the pilot hole is at least as large as the web thickness (see photo (b)) as the next size drill bit. The point of a normal drill bit does not cut but pushes the material out of the way so the flutes can remove it. A pilot hole allows the flutes of the bit to cut efficiently.


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