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Patrick Johnson
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11-14-2012, 09:10 PM

Quote:
Originally Posted by ENGLISH! View Post
I would think that anything involving the different directions of spin of any two(2) 'circular' objects like a gear a 'gear effect' or 'gearing'.
Gears have teeth, so they don't rub against each other. That's why the "gearing english" metaphor is used - it describes exactly enough outside english so the CB's surface rolls across the OB's surface like a ball rolling across the table with no slipping, sliding or rubbing (like two gears meshing).

By the way, there's a simple way to judge the amount of outside spin that will be gearing english for any cut angle (or perfect running english on a rail): visualize the point on the CB that's opposite the CB/OB (or CB/rail) contact point, then offset the tip a little less than halfway (about 40%) to that CB point. Here's a drawing illustrating the method for running english on a rail:

Name:  natural running english.jpg
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Last edited by Patrick Johnson; 11-14-2012 at 09:30 PM.
  
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