finish_chart.htm

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

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

Average Application

Less Frequent Application