Bit Make-up Torque
| Bit Size | API Pin Size | Recommended Torque | |||
|---|---|---|---|---|---|
| in. | mm | in. | mm | ft-lbs. | N-m |
| 3 1/2 to 4 1/2 | 89 to 114 | 2 3/8 Reg. | 60 | 3,000 to 3,500 | 4,000 to 4,800 |
| 4 5/8 to 5 | 118 to 127 | 2 7/8 Reg. | 73 | 4,500 to 5,500 | 6,000 to 7,000 |
| 5 1/8 to 7 3/8 | 137 to 187 | 3 1/2 Reg. | 89 | 7,000 to 9,000 | 9,500 to 12,000 |
| 7 5/8 to 9 | 194 to 229 | 4 1/2 Reg. | 114 | 12,000 to 16,000 | 16,000 to 22,000 |
| 9 1/2 to 28* | 241 to 711 | 6 5/8 Reg. | 168 | 28,000 to 32,000 | 38,000 to 43,000 |
| 14 3/4 to 28* | 375 to 711 | 6 5/8 Reg. or 7 5/8 Reg. | 168 or 194 | 28,000 to 32,000 – 34,000 to 40,000 | 38,000 to 43,000 – 46,000 to 54,000 |
| 18 1/2 to 28* | 470 to 711 | 7 5/8 Regor 8 5/8 Reg. | 194 or 219 | 34,000 to 40,000 – 40,000 to 60,000 | 46,000 to 54,000 – 54,000 to 81,000 |
