| 摘要 |
A drill bit for roller drilling with bearing blowing includes sections connected to each other, each of those includes a leg with pin, roller cutter, chamber with slide bearings, bearing bushing, lock bushing and elastomer cone-like collar that tightens the chamber and is placed between the pin base and the bottom of the cavity in the lock bushing. The diameter dimensions of the pin provide its strength according to most possible axial load on drill bit. |
