The Rotary Broach Method To Getting A Square Hole In Steel

If you have a metal lathe grinder an drill press yo can easily make this tool yourself.

As you are going to see in the video below, you need to make a tool steel broach bit the size of the square hole and then you need a mechanism to make it wobble as you press it into the hole.

Watch the video to see how it's done.

There is also another way to do it – Check out this other post.

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