Surface Roughness Produced by Different Manufacturing Process
Knowing what manufacturing process can produce surface finishes that desired on a surface can be an added advantage while making the designs. Here is a table showing maximum and minimum Ra values can produced on each production methods.
| Process | Roughness Average, Ra – Micrometers μm | |
| Maximum | Minimum | |
| Flame Cutting | 25 | 12.5 |
| Snagging | 25 | 6.3 |
| Sawing | 25 | 1.6 |
| Planing, Shaping | 12.5 | 1.6 |
| Drilling | 6.3 | 1.6 |
| Chemical Milling | 6.3 | 1.6 |
| Elect. Discharge Machining | 4.75 | 1.6 |
| Milling | 6.3 | 0.8 |
| Broaching | 3.2 | 0.8 |
| Reaming | 3.2 | 0.8 |
| Electron Beam | 6.3 | 0.8 |
| Laser | 6.3 | 0.8 |
| Electro-Chemical | 3.2 | 0.2 |
| Boring, Turning | 6.3 | 0.4 |
| Barrel Finishing | 0.8 | 0.2 |
| Electrolytic Grinding | 0.6 | 0.2 |
| Roller Burnishing | 0.4 | 0.2 |
| Grinding | 1.6 | 0.1 |
| Honing | 0.8 | 0.1 |
| Electro-Polish | 0.8 | 0.1 |
| Polishing | 0.4 | 0.1 |
| Lapping | 0.4 | 0.5 |
| Super Finishing | 0.2 | 0.025 |
| Sand Casting | 25 | 12.5 |
| Hot Rolling | 25 | 12.5 |
| Forging | 12.5 | 3.2 |
| Perm. Mold Casting | 3.2 | 1.6 |
| Investment Casting | 3.2 | 1.6 |
| Extruding | 3.2 | 0.8 |
| Cold Rolling, Drawing | 3.2 | 0.8 |
| Die Casting | 1.6 | 0.8 |
Above high and low values are typical for each production methods. But values other than high and low Ra can be obtained under special conditions for each process.
Labels: Engineering Knowledge Base, feature, Surface Finish
