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20-10-2011 #4
Last Activity: 23-09-2017
Slight difference in the way they work.
rotary broaching can only work to about 2X the diameter of the tool in depth.
the cutting in the video can go far longer and stay vertical.
It's based on the Watts drill that was patented in 1918 but known about long before that.
http://www.youtube.com/watch?NR=1&v=JeIi04JoAooJohn S -
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