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Thread: How to Drill a Straight Hole in a Tin Sheet

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    Supporting Member liberal's Avatar
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    Thumbs up How to Drill a Straight Hole in a Tin Sheet


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    mwmkravchenko (Nov 3, 2021)

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

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    KustomsbyKent (Nov 1, 2021)

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    Second hole isnít quite straight. Could be size of the drill makes a difference. Iíve seen this before. Nice idea.

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    Supporting Member mklotz's Avatar
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    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.
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    mwmkravchenko (Nov 3, 2021)

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    Supporting Member liberal's Avatar
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    I just needed to use wood blocks from a denser wood.

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    Supporting Member mwmkravchenko's Avatar
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    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

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    liberal (Nov 3, 2021)

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    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:






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