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 Reg. or 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 |