The Mechanical
Engineering Handbook




Surface Roughness Aproximation Calculator







 

 

 


How This Is Calculated



$$ R_a = \frac{f^2}{32r} $$ where:

Ra   =   Average surface rougness   (mm)

f   =   Feed rate   (mm)

r   =   Tool corner radius   (mm)


Assumptions



  • Cutting conditions remain constant.
  • The tool cutting speed is the primary factor affecting the tool life.
  • Tool wear is uniform.
  • Temperature effects are neglected.


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