Degree | Roughness values | ||
CT-5 | CT-6 | CT-7 | |
0-10 | 0.36 | 0.52 | 0.74 |
10-16 | 0.38 | 0.54 | 0.78 |
| 16-25 | 0.42 | 0.58 | 0.82 |
| 25-40 | 0.46 | 0.64 | 0.90 |
| 40-63 | 0.50 | 0.70 | 1.00 |
| 63-100 | 0.56 | 0.78 | 1.10 |
| 100-160 | 0.62 | 0.88 | 1.20 |
| 160-250 | 0.70 | 1.00 | 1.40 |
| 250-400 | 0.78 | 1.10 | 1.60 |
| 400-630 | 0.90 | 1.20 | 1.80 |
| 630-1000 | 1.00 | 1.40 | 2.00 |
| 1000-1600 | 1.60 | 2.20 | |
| 1600-2500 | 2.60 | ||