2-11 Lab                                               

3.6.2 Surface                                          
Texture                                                



Brass                            

Speed (RPM)    Feed (thou./rev)     Roughness (Ra scale)           
       



     1000              1.1                0.79         

     1000              2.6                1.06         

     1000              6.5                1.52         

     1000              9.2            out of range     





Steel                            

Speed (RPM)    Feed (thou./rev)     Roughness (Ra scale)    
        



      255              1.2                2.02         

      255              2.1                1.95         

      255              5.8                3.37         

      255               9                 4.71