Acus rotatoriae ferreae: series NK
| Designatio Ferendi | Dimensiones Limitales | Onus Basicum (KN) | Velocitas Limitans | |||
| d | D | C | Cr | Cor | rpm | |
| NK5/10TN | 5 | 10 | 10 | 2.1 | 1.4 | 36780 |
| NK8/12TN | 8 | 15 | 12 | 3.05 | 3.65 | 29112 |
| NK10/12TN | 10 | 17 | 12 | 4.75 | 5.35 | 23500 |
| NK12/12 | 12 | 19 | 12 | 6.05 | 6.4 | 21640 |
| NK12/16 | 12 | 19 | 16 | 8.2 | 9.8 | 21640 |
| NK15/16 | 14 | 22 | 16 | 8.26 | 9.6 | 18322 |
| NK15/12 | 15 | 23 | 12 | 8.6 | 10.07 | 21004 |
| NK16/16 | 16 | 24 | 16 | 9.03 | 11.9 | 15522 |
| NK16/20 | 16 | 24 | 20 | 10.4 | 16.8 | 15522 |
| NK17/16 | 17 | 25 | 16 | 9 | 13.5 | 14163 |
| NK18/20 | 18 | 26 | 20 | 10.5 | 13.8 | 13628 |
| NK20/16 | 20 | 28 | 16 | 11.5 | 13.4 | 12716 |
| NK20/20 | 20 | 28 | 20 | 12.4 | 21.8 | 12716 |
| NK22/16 | 22 | 30 | 16 | 13.5 | 18 | 11527 |
| NK25/16 | 25 | 33 | 16 | 12.9 | 20.4 | Quindecim milia |
| NK25/20 | 25 | 33 | 20 | 16.8 | 28.5 | Quindecim milia |
| NK26/16 | 26 | 34 | 16 | 15 | 23 | 16300 |
| NK26/20 | 26 | 34 | 20 | 17 | 30 | 16300 |
| NK30/20 | 30 | 40 | 20 | 20.6 | 32 | 14600 |
| NK30/30 | 30 | 40 | 30 | 31.5 | 50 | 12066 |
| NK32/20 | 32 | 42 | 20 | 17.5 | 33.5 | 12066 |
| NK35/20 | 35 | 45 | 20 | 13.851 | 26.9 | Duodecim milia |
| NK40/20 | 40 | 50 | 20 | 19.6 | 43 | 8881 |
| NK40/30 | 40 | 50 | 30 | 22.2 | 513.5 | 8881 |
| NK42/20 | 42 | 52 | 20 | 23.9 | 45 | Decem milia |
| NK42/30 | 42 | 52 | 30 | 27 | 49 | Decem milia |
| NK43/20 | 43 | 53 | 20 | 25.7 | 49 | Decem milia |
| NK43/30 | 43 | 53 | 30 | 39 | 75 | Decem milia |
| NK 45/20 | 45 | 55 | 20 | 27.5 | 53 | Decem milia |
| NK 45/30 | 45 | 55 | 30 | 41 | 88 | Decem milia |
| NK 47/20 | 47 | 57 | 20 | 28.5 | 56 | 9500 |
| NK 47/30 | 47 | 57 | 30 | 43 | 94 | 9500 |
| NK 50/25 | 50 | 62 | 25 | 38 | 74 | 9000 |
| NK 50/35 | 50 | 62 | 35 | 50 | 106 | 9000 |
| NK 55/25 | 55 | 68 | 25 | 40 | 82 | Octo milia |
| NK 55/35 | 55 | 68 | 35 | 53 | 118 | Octo milia |
| NK 60/25 | 60 | 72 | 25 | 42 | 90 | 7500 |
| NK 60/35 | 60 | 72 | 35 | 56 | 130 | 7500 |
| NK 65/25 | 65 | 78 | 25 | 44 | 98 | 7000 |
| NK 60/35 | 65 | 78 | 35 | 59 | 142 | 7000 |
| NK 68/25 | 68 | 82 | 25 | 43.5 | 89 | 6500 |
| NK 68/35 | 68 | 82 | 35 | 62 | 139 | 6500 |
| NK 70/25 | 70 | 85 | 25 | 44.5 | 92 | 6500 |
| NK 70/35 | 70 | 85 | 35 | 63 | 144 | 6500 |
| NK 73/25 | 73 | 90 | 25 | 53 | centum | Sex milia |
| NK 73/35 | 73 | 90 | 35 | 75 | CLVI | Sex milia |
| NK 75/25 | 75 | 92 | 25 | 54 | 104 | Sex milia |
| NK 75/35 | 75 | 92 | 35 | 77 | CLXII | Sex milia |
| NK 80/25 | 80 | 95 | 25 | 56 | 119 | 5500 |
| NK 80/35 | 80 | 95 | 35 | 78 | CLXXXIV | 5500 |
| NK 85/25 | 85 | 105 | 25 | 69 | 123 | Quinque milia |
| NK 85/35 | 85 | 105 | 35 | 98 | 193 | Quinque milia |
| NK 95/25 | 90 | 110 | 25 | 72 | 132 | 4900 |
| NK 95/35 | 90 | 110 | 35 | 103 | 208 | 4900 |
| NK 95/26 | 95 | 115 | 26 | 73 | 137 | 4700 |
| NK 95/36 | 95 | 115 | 36 | 107 | 223 | 4700 |
| NK 100/26 | centum | CXX | 26 | 76 | 146 | 4500 |
| NK 100/36 | centum | CXX | 36 | 111 | 237 | 4500 |
| NK 105/26 | 105 | 125 | 26 | 78 | CLV | 4300 |
| NK 105/36 | 105 | 125 | 36 | 114 | 250 | 4300 |
| NK 110/30 | 110 | 130 | 30 | 98 | 210 | 4100 |
| NK 110/40 | 110 | 130 | 40 | 127 | 290 | 4100 |
