How to Drill a Straight Hole in a Tin Sheet

[liberal]

[Fast.Eddie]

I've always just used a step drill (Unibit).

[mdhatter3]

Second hole isn’t quite straight. Could be size of the drill makes a difference. I’ve seen this before. Nice idea.

[mklotz]

I'm not sure what "neat" and "straight" mean in this context but the larger 15 mm hole is distinctly trilobal, not circular.

Use of a step drill, as suggested, is definitely preferable. Not only will you get a circular hole, but it will be much easier to place it precisely; precision locating on wood is an oxymoron.

[liberal]

I just needed to use wood blocks from a denser wood.

[mwmkravchenko]

You can precisely locate in wood, it takes a pilot hole. Through another piece of wood. Do it rather regularly up to 6 inch diameter when I use large hole saws.

This is a method that works, and not all required hole sizes are available on step drills. I have quite a few of those to

[DIYer]

Thanks liberal! We've added your Sheetmetal Drilling Method to our Drilling and Drill Presses category,
as well as to your builder page: liberal's Homemade Tools. Your receipt:

Sheetmetal Drilling Method by liberal

tags: sheetmetal, drilling