钻铤螺纹型号 | 外径D/mm(in) | 内径d/mm(in) | 长度L/mm | 台肩倒角直径 DF/mm | 参考的弯曲 强度比 |
NC26-35(23/8IF) | 88.9(31/2) | 38.1(11/2) | 9150 | 82.9 | 2.42:1 |
NC35-47 | 120.7(43/4) | 50.8(2) | 9150 | 114.7 | 2.58:1 |
NC46-62(4IF) | 158.8(61/4) | 71.4(213/16) | 9150或9450 | 150 | 2.63:1 |
NC46-65(4IF) | 165.1(61/2) | 71.4(213/16) | 9150或9450 | 154.8 | 3.15:l |
NC50-70(41/2IF) | 177.8(7) | 71.4((213/16) | 9150或9450 | 164.7 | 2.73:1 |
NC56-80 65/8REG | 203.2(8) | 71.4(213/16) | 9150或9450 | 190.1 | 3.02:l |
NC61-9075/8REG | 228.6(9) | 71.4(213/16 | 9150或9450 | 212.7 | 3.17:1 |