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Surface Roughness Table - Shows the roughness average for different manufacturing processes in micrometers and microinches. The values are shown with a typical range and a less frequent range for each manufacturing process.
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Average Range |
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Less Frequent Range |
Manufacturing
Process |
Roughness Average
Top Number - Micrometers
Bottom Number - (Microinches)
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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 (.5) |
| Flame Cutting |
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| Snagging |
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| Sawing |
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| Planing, Shaping |
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| Drilling |
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| Chemical Milling |
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| EDM Elect Discharge Machining |
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| Milling |
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| Broaching |
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| Reaming |
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| Electron Beam |
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| Laser |
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| Electro-Chemical |
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| Boring, Turning |
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| Barrel Finishing |
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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 (.5) |
| Electrolytic Grinding |
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| Roller Burnishing |
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| Grinding |
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| Honing |
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| Electro-Polish |
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| Polishing |
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| Lapping |
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| Super Finishing |
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| Sand Casting |
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| Hot Rolling |
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| Forging |
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| Permanent Mold Casting |
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| Investment Casting |
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| Extruding |
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| Cold Rolling, Drawing |
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| Die Casting |
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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 (.5) |
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