I noticed people often hasn't the slightest idea of the amplitude of angles.
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I noticed people often hasn't the slightest idea of the amplitude of angles.
Ok, the tool for turning steel has a rake angle¹ of 12°, but how much is it?
Look at the watch dial!
15 minutes make a 90° angle, thus every minute the hand moves of 6°, and the rake angle above is the same of 2 minutes.
Easy, isn't it?
Of course this doesn't work on digital watches.
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