Complaint
| The IADC code is a three numbered system to classify the hardness and type for all roller cone rock bits. | ||
| 1 - Steel Tooth for soft formations | Designates the hardness subclass of major hardness class. This ranges from 1 to 4, where 1 is classified as the softest subclass and 4 is the hardest subclass. | 1 - Roller bearing |
| 2 - Steel Tooth for medium formations | 2 - Roller bearing air-cooled | |
| 3 - Steel Tooth for hard formations | 3 - Roller bearing with gage bevel inserts | |
| 4 - TCI for soft formations | 4 - Sealed roller bearing | |
| 5 - TCI for soft/medium formations | 5 - Sealed roller bearing with gage bevel insets | |
| 6 - TCI for medium/hard formations | 6 - Sealed friction bearing | |
| 7 - TCI for hard formations | 7 - Sealed friction bearing with gage bevel inserts | |
| 8 - TCI for extremely hard formations | 8 - Directional | |
| TRICONE DRILL BITS - STANDARD CONNECTION SIZES | |
| SIZE | STANDARD PIN CONNECTION |
| 2 1/2" to 2 3/4" inclusive | A - AW Rod |
| 2 7/8" to 3 3/8" inclusive | N4 Rod |
| 3 1/2" to 4 1/2" inclusive | 2 3/8" API |
| 4 5/8" to 5" inclusive | 2 7/8" API |
| 5 1/8" to 7 3/8" inclusive | 3 1/2" API |
| 7 1/2" to 9 3/8" inclusive | 4 1/2" API |
| 9 1/2" to 14 3/8" inclusive | 6 5/8" API |
| 14 1/2" to 18 1/2" inclusive | 6 5/8" API or 7 5/8" API |
| 18 5/8" to 26" inclusive | 7 5/8" API or 8 5/8" API |
| 27" and larger | 8 5/8" API |
| NO. | TRICONE ROCK BIT SIZE | API THREAD REG.PIN | |
| in | mm | ||
| 1 | 3 3/4 | 95.3 | 2 3/8 |
| 2 | 3 7/8 | 98.4 | 2 3/8 |
| 3 | 4 1/8 | 104.8 | 2 3/8 |
| 4 | 4 1/4 | 108 | 2 3/8 |
| 5 | 4 1/2 | 114.3 | 2 3/8 |
| 6 | 4 5/8 | 117.5 | 2 7/8 |
| 7 | 4 3/4 | 120.7 | 2 7/8 |
| 8 | 4 7/8 | 123.8 | 2 7/8 |
| 9 | 5 1/2 | 139.7 | 3 1/2 |
| 10 | 5 5/8 | 142.9 | 3 1/2 |
| 11 | 5 2/3 | 143.9 | 3 1/2 |
| 12 | 4 3/4 | 146.1 | 3 1/2 |
| 13 | 5 7/8 | 149.2 | 3 1/2 |
| 14 | 6 | 152.4 | 3 1/2 |
| 15 | 6 1/8 | 155.6 | 3 1/2 |
| 16 | 6 1/4 | 158.8 | 3 1/2 |
| 17 | 6 1/2 | 165.1 | 3 1/2 |
| 18 | 6 5/8 | 168.3 | 3 1/2 |
| 19 | 6 3/4 | 171.5 | 3 1/2 |
| 20 | 7 1/2 | 190.5 | 4 1/2 |
| 21 | 7 5/8 | 193.7 | 4 1/2 |
| 22 | 7 7/8 | 200 | 4 1/2 |
| 23 | 8 3/8 | 212.7 | 4 1/2 |
| 24 | 8 1/2 | 215.9 | 4 1/2 |
| 25 | 8 5/8 | 219.1 | 4 1/2 |
| 26 | 8 3/4 | 222.3 | 4 1/2 |
| 27 | 9 1/2 | 241.3 | 6 5/8 |
| 28 | 9 5/8 | 244.5 | 6 5/8 |
| 29 | 9 7/8 | 250.8 | 6 5/8 |
| 30 | 10 1/2 | 266.7 | 6 5/8 |
| 31 | 10 5/8 | 269.9 | 6 5/8 |
| 32 | 11 | 279.4 | 6 5/8 |
| 33 | 11 5/8 | 295.3 | 6 5/8 |
| 34 | 12 | 304.8 | 6 5/8 |
| 35 | 12 1/4 | 311.2 | 6 5/8 |
| 36 | 12 5/16 | 312.7 | 6 5/8 |
| 37 | 13 3/8 | 314.3 | 6 5/8 |
| 38 | 12 7/16 | 315.9 | 6 5/8 |
| 39 | 12 5/8 | 320.7 | 6 5/8 |
| 40 | 13 1/8 | 333.4 | 6 5/8 |
| 41 | 13 1/2 | 342.9 | 6 5/8 |
| 42 | 13 5/8 | 346.1 | 6 5/8 |
| 43 | 13 3/4 | 349.3 | 6 5/8 |
| 44 | 14 1/2 | 368.3 | 7 5/8 |
| 45 | 14 3/4 | 374.7 | 7 5/8 |
| 46 | 15 1/2 | 393.7 | 7 5/8 |
| 47 | 16 | 406.4 | 7 5/8 |
| 48 | 17 1/2 | 444.5 | 7 5/8 |
| 49 | 18 7/8 | 479.4 | 7 5/8 |
| 50 | 20 | 508 | 7 5/8 |
| 51 | 22 | 558.8 | 7 5/8 |
| 52 | 24 | 609.6 | 7 5/8 |
| 53 | 26 | 660.4 | 7 5/8 |
| 54 | 28 | 711.2 | 7 5/8 |
| 55 | 30 | 762 | 7 5/8 |
