Surface Roughness: die_casting to edm_sinker
Surface roughness (Ra) values achievable by various manufacturing processes — turning, milling, grinding, lapping, etc.
| record id | notes | process | process category | ra max uin (uin) | ra max um (um) | ra min uin (uin) | ra min um (um) | ra typical uin (uin) | ra typical um (um) |
|---|---|---|---|---|---|---|---|---|---|
| die_casting | Pressure die casting; aluminum, zinc, magnesium alloys | Die Casting | casting | 126 | 3.2 | 31.5 | 0.8 | 63 | 1.6 |
| drawing | Cold drawing through die; bright finish | Drawing (Wire/Tube) | forming | 63 | 1.6 | 7.9 | 0.2 | 31.5 | 0.8 |
| drilling | Standard twist drill; finish depends on material and drill condition | Drilling | machining | 492.1 | 12.5 | 63 | 1.6 | 248 | 6.3 |
| ecm | Anodic dissolution; no tool wear, no heat-affected zone | Electrochemical Machining (ECM) | non_traditional | 126 | 3.2 | 3.9 | 0.1 | 31.5 | 0.8 |
| edm_sinker | Electrical discharge machining with shaped electrode; finish depends on current | EDM (Sinker / Die-Sinking) | non_traditional | 492.1 | 12.5 | 31.5 | 0.8 | 126 | 3.2 |
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