How do you cut a square hole in a steel plate?

15 Apr.,2024

 

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I have a project I'm working on and looking for ideas. I don't have a mill. and no one I know has a mill.

I have steel plates, 1'by1' by 1"thick. I picked them up and a junk yard. they currently have a 1" round hole in the center. What I need for the project is to increase the size of that hole to 1.5" and square to fit a piece of square tubing. Angle grinder doesn't dig deep enough. i used the drill press for corner holes, and tried for connecting holes, but they started to drift into the enceter hole already there.

any idea how to do this wih a basic selection of handyman tools?

I have files, but I really don't have any file that would make that a practical option except for cleaning up the hole when it gets near it's final size.

 

Bugman said:

Here's my situation. I am making some bumpers(10 to be exact) and I need to make some 1/2" square holes in them. I've been drilling 1/2" holes, then using a die grinder and file to make them square. With 6 holes per bumper, thats 60 holes, and it is going to take a long time to do them all. So, is there a faster way to do it? I have a small press avalible to me. Is there a tool I can buy or make that will make things quicker/easier/more repeatable? Thanks

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How do you cut a square hole in a steel plate?

Making a 1/2" square hole in plate steel"

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