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September 20, 2014

September 20, 2014

Posted by **Troy** on Wednesday, August 1, 2012 at 12:54pm.

- Math -
**Steve**, Wednesday, August 1, 2012 at 1:19pmradius is 3/16 in

speed of edge of drill bit: 1300 rev/min * (2pi*3/16) in/rev = 1531.5 in/min

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