1. The back cone adopts spherical buttons, and the main cone adopts conical buttons.
2. Randomly distributed buttons are used to achieve full coverage of the bottom crushing zone.
3. The bearing structure is a core covering bearing for roller cutter.
4. Use high-quality metal seals.
5. The roller cutters can be repaired and customized.
1. Applicable rock hardness: protodyakonov scale of hardness f≤12.
2. Recommended WOB of roller cutter: 100KN~170KN (12″), 60KN~100KN (8″).
3. Maximum WOB (weight on bit): 196KN (12″), 120KN (8″).
4. Recommended cutterhead rotation speed: 3-15 RPM.
5. Maximum linear velocity: 90m/min.
NO. | Model | Size | A | B | C | D | E | F | Taper |
1 | LT28020-00A | 12″ | 340 | 227 | 280 | 45 | 86 | 80 | 20° |
2 | LT21820-00A | 8″ | 192 | 156 | 218 | 30.5 | 59.5 | 49.5 | 20° |