SURFACE ROUGNESSES PRODUCED BY COMMON PRODUCTION PROCESSES

Roughness Average
Micrometers µm
(Microinches  µ 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)

KEY:
Average Application
Less Frequent Application

Higher or lower values may be obtained under special conditions


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