Sunday, November 27, 2011

How to Drill a Square Hole

You just need the right drill bit:


[YouTube direct link] (Viewer #32,054)

3 comments:

  1. Also known as a Rouleaux wheel, same principle as the rotary engine.

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  2. It doesn't hurt to have the drill press either. ;-)

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  3. Yep. Saw these in action at the McCormic machine show back in 1995 or so...

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