Drill bits
Tricone and PDC rock bits — from medium ground to the hardest rock, with API Reg pin connections.
Rock bits, chosen by the formation
A rock bit is chosen for the rock it has to cut. Our tricone bits come in four diameters from 5½″ to 6¾″, each in several IADC grades, so the same hole size can be drilled in soft, medium or hard formations with the right bit.
A tricone bit has three rolling cones that crush and chip the rock as the bit turns. Milled-tooth bits have steel teeth cut into the cones; TCI bits carry pressed-in tungsten-carbide inserts and are the choice for harder and more abrasive rock. The 7⅞″ PDC bit has no moving parts — fixed cutters shear the rock instead of crushing it.
The three-digit IADC code says what a tricone bit is made for. The first digit is the cutting structure and the formation: 1–3 are milled-tooth bits, 4–8 are TCI bits, and the higher the number, the harder the rock. The second digit grades the hardness within that series, from 1 to 4. The third digit is the bearing — every bit here ends in 7, a sealed friction bearing with gauge protection.
- Four diameters: 5½″, 6″, 6½″ and 6¾″ (140 – 171 mm)
- IADC 217 to 837 — milled tooth and TCI
- Sealed friction bearings with gauge protection
- 2⅞″ or 3½″ API Reg pin connection
- Replaceable nozzles in 4, 5 and 8 mm
- PDC bit 7⅞″ with 4½″ API Reg pin
- Pressure-compensated lubrication in the sealed bearings
- Made to ISO 9001:2015 and API Spec 7-1 / 7-2
Sizes, IADC codes and threads
Choose the diameter, then the IADC code for your formation. Press Get quote on any row and we come back with a quote, stock and lead time.
Tricone bits
Nineteen bits, 5½″ to 6¾″, sorted by diameter and IADC code.
| Bit diameter | Part number | IADC code | Type · formation | Thread | Quote |
|---|---|---|---|---|---|
| 5½″ / 140 mm | CGT217 | 217 | Milled tooth · medium | 2⅞″ API Reg pin | |
| 5½″ / 140 mm | CGT547 | 547 | TCI · soft to medium | 2⅞″ API Reg pin | |
| 5½″ / 140 mm | CGT617 | 617 | TCI · medium-hard | 2⅞″ API Reg pin | |
| 5½″ / 140 mm | CGT637 | 637 | TCI · medium-hard | 2⅞″ API Reg pin | |
| 5½″ / 140 mm | CGT647 | 647 | TCI · medium-hard | 2⅞″ API Reg pin | |
| 5½″ / 140 mm | CGT737 | 737 | TCI · hard | 2⅞″ API Reg pin | |
| 6″ / 152 mm | CGT537-2 | 537 | TCI · soft to medium | 2⅞″ API Reg pin | |
| 6″ / 152 mm | CGT617-2 | 617 | TCI · medium-hard | 2⅞″ API Reg pin | |
| 6″ / 152 mm | CGT617-3 | 617 | TCI · medium-hard | 3½″ API Reg pin | |
| 6″ / 152 mm | CGT637-2 | 637 | TCI · medium-hard | 2⅞″ API Reg pin | |
| 6″ / 152 mm | CGT637-4 | 637 | TCI · medium-hard · high RPM | 2⅞″ API Reg pin | |
| 6½″ / 165 mm | CGT437-1 | 437 | TCI · soft | 3½″ API Reg pin | |
| 6½″ / 165 mm | CGT547-1 | 547 | TCI · soft to medium | 3½″ API Reg pin | |
| 6½″ / 165 mm | CGT617-1 | 617 | TCI · medium-hard | 3½″ API Reg pin | |
| 6½″ / 165 mm | CGT637-1 | 637 | TCI · medium-hard | 3½″ API Reg pin | |
| 6½″ / 165 mm | CGT737-1 | 737 | TCI · hard | 3½″ API Reg pin | |
| 6½″ / 165 mm | CGT837-1 | 837 | TCI · very hard | 3½″ API Reg pin | |
| 6¾″ / 171 mm | CGT437-3 | 437 | TCI · soft | 3½″ API Reg pin | |
| 6¾″ / 171 mm | CGT637-3 | 637 | TCI · medium-hard | 3½″ API Reg pin |
PDC bit
One size, 7⅞″, with a 4½″ API Reg pin.
| Bit diameter | Part number | IADC code | Type · formation | Thread | Quote |
|---|---|---|---|---|---|
| 7⅞″ / 200 mm | CGT-MG-1 | — | PDC · fixed cutters | 4½″ API Reg pin |
Nozzles and spares
Nozzles in three sizes, with the clip ring and O-ring that hold and seal them in the bit.
| Description | Part number | Fits | Quote |
|---|---|---|---|
| Nozzle 4 mm | CGT NOZZLE 4MM | Tricone bits | |
| Nozzle 5 mm | CGT NOZZLE 5MM | Tricone bits | |
| Nozzle 8 mm | CGT NOZZLE 8MM | Tricone bits | |
| Nozzle clip ring | CGT CLIPRING | Tricone bits | |
| Nozzle O-ring | CGT O-RING | Tricone bits |
Sizes, IADC codes and threads per our article list. The formation is read from the IADC code and is a guide only — tell us the rock and the rig and we help you choose.
Tell us the job — we'll match the tools.
Send us your machine model and quantity and we'll come back with a quote and lead time.