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Backoff fishing spear Pulling power KN 166 Allowed pulling power KN 850
Descriptions of Backoff fishing spear Pulling power KN 166 Allowed pulling power KN 850:
Releasing back off spear is used for fishing, back off and releasing the fish. It can catch and transmit left hand torque during back off. It can instead of left hand taper taps and die collars. The function is similar to back off sub. The difference is that it doesn’t need to make up thread with fish and catch at any part internally.
Specification:
| Type | Size | ID mm(in) | Allowed pulling power KN |
Initial pilling power and relevant torque | Connection | |
| Pulling power KN | Torque N-M | |||||
| DLM-T60 | 2 3/8 | 50.8(2) | 330 | 147 | 4313 | 2 7/8REG |
| DLM-T73 | 2 7/8 | 57.4(2 1/4) | 500 | 166 | 5799 | NC31 |
| 62(2 7/16) | ||||||
| 69.9(2 3/4) | ||||||
| 74.2(2 59/64) | ||||||
| 76.2(3) | ||||||
| 77.9(3 3/64) | ||||||
| DLM-T89 | 3 1/2 | 76(3) | 650 | 166 | 9593 | NC31 |
| 77.9(3 3/64) | ||||||
| 84.8(3 11/32) | ||||||
| 88.3(3 31/64) | ||||||
| 90.1(3 35/64) | ||||||
| DLM-T114 | 4 1/2 | 97.2(3 53/64) | 850 | 196 | 11522 | 4 1/2REG |
| 99.6(3 59/64) | ||||||
| 101.6(4) | ||||||
| 102.8(4 3/64) | ||||||
| 103.6(4 5/64) | ||||||
| DLM-T127 | 5 | 108.7(4 9/32) | 860 | 196 | 12320 | 4 1/2REG |
| 112(4 13/32) | ||||||
| 114.1(4 1/2) | ||||||
| 115.8(4 9/16) | ||||||
| DLM-T140 | 5 1/2 | 118.6(4 43/64) | 880 | 196 | 13263 | NC50 |
| 5 1/2 | 121.4(4 3/4) | |||||
| 124.3(4 57/64) | ||||||
| 125.7(4 61/64) | ||||||
| 127.3(5 1/64) | ||||||