Difference between revisions of "Choosing a Small Sprocket"

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It is important not to choose a sprocket too small for the smoothest power transfer.
 
It is important not to choose a sprocket too small for the smoothest power transfer.
  
(pitch /(2*TAN(PI()/ teeth ))) / (pitch /(2*SIN(PI()/ teeth )))
+
Most engineering manuals suggest that 17 teeth be a minimum for high speed systems.
  
Most engineering manuals suggest that 17 teeth be a minimum for high speed systems.
 
  
 +
This graph shows the % change in leverage as the sprocket rotates. (pitch /(2*TAN(PI()/ teeth ))) / (pitch /(2*SIN(PI()/ teeth )))
  
  

Revision as of 17:13, 27 October 2007

Chain Sprockets are effectively regular polygons. Because of this, when the small sprocket is pulling the chain a pulse is created in the system.

It is important not to choose a sprocket too small for the smoothest power transfer.

Most engineering manuals suggest that 17 teeth be a minimum for high speed systems.


This graph shows the % change in leverage as the sprocket rotates. (pitch /(2*TAN(PI()/ teeth ))) / (pitch /(2*SIN(PI()/ teeth )))


Cog-Variance-from-round.gif