Module Calculation︱Gear Rack
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 Module is the unit of size to indicate how big or small a gear pinion is.  It is the ratio of the reference diameter of the gear pinion divided by the number of teeth.  Thus the formula of module calculation is as following:

 

  • Module ( M ) = Reference Diameter ( R d ) / Number of Tooth ( N t )
  • Reference Diameter (R d) = Reference Diameter ( R d ) / Module ( M )
  • Reference Diameter (R d) = π x Module ( M )

 

For Example:  Module 1.5 = 1.5*3.1415926 = Pitch 4.7124 mm

 

 The table presents the method for calculating the mesh of a rack with pinion:  

moduleCaculation2

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