| US | Ra | Ra | UK |
| GRIT |
µ inch |
µm |
GRIT |
| 125 | 3 | 120 | |
| 85 | 2 | 180 | |
| 80 | 70 | 1.65 | |
| 50 | 1.5 | 240 | |
| 30 | 0.75 | 320 | |
| 180 | 25 | 0.62 | |
| 240 | 18 | 0.45 | |
| 15 | 0.40 | 500 | |
| 320 | 10 | 0.25 |
How do I convert grit finish to Ra finish?
Below is a table cross referencing grit finishes with Ra finishes:
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