How to Drill a Straight Hole in a Tin Sheet

**liberal** · Oct 30, 2021, 09:58 AM

**Fast.Eddie** · Nov 1, 2021, 08:45 PM

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

**mdhatter3** · Nov 2, 2021, 05:46 AM

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

**mklotz** · Nov 2, 2021, 08:23 AM

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** · Nov 2, 2021, 08:43 AM

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

**mwmkravchenko** · Nov 3, 2021, 10:53 AM

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