reuleaux...

desdemona discovered this in Mathematics •9 reviews since May 13, 2004
mathematics, machining •upper.us.edu/faculty/smith/reuleaux.htm

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lordpuaka rated 2 weeks ago

Quite useful for me to make a square hole.

WendyFan rated 6 months ago

Awesome description of a method by which a square hole may be drilled. Complete with mathematics :-)

scandly rated 10 months ago

"Drilling Square Holes" also http://whistleralley.com/reuleaux/reuleaux.htm

wjburr rated 16 months ago

This is stinkin cool! I want to drill a square hole! If I get to do one I will definitely post pics.

STufaro rated 17 months ago

Pretty cool! I've often wondered about this.

JohnShepler rated 21 months ago

They sure didn't show us this in shop class, but it would have been really cool if they had.

earthbound rated 22 months ago

Reuleaux triangles make it possible to drill a square hole. At my job I make crankshafts using lathe inserts that look exactly like this, except they are only a few centimeters thick. Instead of drilling vertically and making a square hole, they go horizontally or diagonally.