Roughness Average - Micrometers m (Microinches  in.)
Process 50
(2000)
25
(1000)
12.5
(500)
6.3
(250)
3.2
(125)
1.6
(63)
0.80
(32)
0.40
(16)
0.20
(8)
0.10
(4)
0.05
(2)
0.025
(1)
0.012
(0.5)
Flame Cutting      
Snagging      
Sawing            
Planing, Shaping            
Drilling        
Chemical Milling        
Elect. Discharge Mach.          
Milling              
Broaching        
Reaming        
Electron Beam          
Laser          
Electro-Chemical                
Boring, Turning                  
Barrel Finishing            
Electrolytic grinding        
Process 50
(2000)
25
(1000)
12.5
(500)
6.3
(250)
3.2
(125)
1.6
(63)
0.80
(32)
0.40
(16)
0.20
(8)
0.10
(4)
0.05
(2)
0.025
(1)
0.012
(0.5)
Roller Burnishing      
Grinding                
Honing            
Electro-Polish              
Polishing            
Lapping            
Superfinishing            
Sand Casting      
Hot Rolling      
Forging        
Perm Mold Casting      
Investment Casting        
Extruding          
Cold Rolling, Drawing          
Die Casting      
Process 50
(2000)
25
(1000)
12.5
(500)
6.3
(250)
3.2
(125)
1.6
(63)
0.80
(32)
0.40
(16)
0.20
(8)
0.10
(4)
0.05
(2)
0.025
(1)
0.012
(0.5)

    Average Application
 
    Less Frequent Application