Roughness according till finish

Finishing by material removal type Roughness Ra in μm
<0,012 <0,025 <0,05 <0,1 <0,2 <0,4 <0,8 <1,6 <3,2 <6,3 <12,5 <25 <50
Autogenous cutting 2 | $
Sawing 2 | | | $
Chafing 2 | | | $
Blanking 2 | $
Chemical treatment 2 | | $
Spark erosion 2 | | $
Drilling 2 | | $
Clearing 2 | | $
Hobbing 2 | | | $ $
Turning 2 | | | $
Broaching 2 | | $
Boring 2 | | $
Filing 2 | | $
Grinding 2 | | | | $
Brushing 2 | $
Cleansing 2 | $
Honing 2 | | | $
Polishing 2 2 2 | | $
To lap 2 2 | | | $
Superfine polishing 2 2 | | $ $
Finish without material removal Roughness in micro-inch
<0,5 <1 <2 <4 <8 <16 <32 <63 <125 <250 <500 <1000 <2000
Sand casting 2 | $
Hot rolling 2 | $
Blanking 2 2 | | $
Form casting
2 | $
Wax casting 2 | | $
Extruding 2 | | $
Cold rolling 2 | | | $
Die-casting 2 | $

2: more fine |: achievable $: more rough