No math way to divide circumference of a dowel into equal parts - Router Forums
Old 12-08-2016, 02:28 PM Thread Starter
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No math way to divide circumference of a dowel into equal parts

Many of you already know and use this trick but just in case you don’t I thought I’d post it.

I wanted to drill six equally spaced holes in the circumference of wood dowel that is about 1 1/4” in diameter. I could get out the calculator and determine the circumference with the pi x d formula and then divide that by 6 and try to measure and mark. But there’s an easier way.

• First mark a line at any spot on the circumference.
• Then align the mark with edge of a sheet of paper.
• Roll the dowel along the paper until the mark hits the paper again and mark the spot.
• Extend the marked line down the page and align a ruler so that you can mark equal parts between the edge of the sheet and the line. (I know you’ve done this before.)
• Mark the divisions at the top of the sheet.
• Cut a narrow marked strip from the sheet and wrap it around the dowel so you can mark the divisions.

That’s it. No math, no trouble, and you end up with nicely spaced holes.
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Old 12-08-2016, 03:52 PM
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For sixths, you can use a compass set to the radius of the dowel. Pick one point on the edge and swing an arc around that point. Repeat using the end of each arc until you have a 6-pointed figure on the dowel. No math, no measurement, just basic geometry.

Only works for six sides/points though.

<Chas>

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Old 12-08-2016, 04:29 PM
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Now Oliver's made me wonder what this 6 spoke wheel is for, what's he making now!!!??!!?!?

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Old 12-08-2016, 05:52 PM
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Just mark the center line & measure off 60 degree angles.
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Old 12-08-2016, 07:38 PM
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Clever method Oliver. Thanks.

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Old 12-08-2016, 07:52 PM
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Quote:
Originally Posted by vindaloo View Post
Now Oliver's made me wonder what this 6 spoke wheel is for, what's he making now!!!??!!?!?

hehehe, he always posts a teaser when starting a new project.....

James
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Old 12-09-2016, 08:04 AM
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Heeeerrrreee We Go, Again!!!!!!!!!!!!!!!!

Quote:
Originally Posted by jw2170 View Post
hehehe, he always posts a teaser when starting a new project.....
Truer words were never spoken...

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Old 12-09-2016, 08:52 AM
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Old 12-09-2016, 10:05 AM
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Quote:
Originally Posted by Cherryville Chuck View Post
Clever method Oliver. Thanks.
+1

Cheers.

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Old 12-10-2016, 12:26 AM
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We will all just have to sit back and see what he comes up with.

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