CONE BIT BEARING Russian patent published in 2006 - IPC E21B10/22 

FIELD: rock cutting tools, particularly cone bits.

SUBSTANCE: bearing comprises axes with channel for locking finger receiving and rolling cutter installed on the axle. Rolling cutter and axle have race for ball retaining bit bearing. Annular race is defined by part of circular arch and two chords, which connect circular arches with axle channel for bearing assembly. Point of channels for locking finger receiving and chords intersection in diametrical axle plane is located over axle axis. Part of race made as part of circular arch is located in lower axle part and the arch defines 110-130° angle. Channel for locking finger receiving is parallel to axle axis.

EFFECT: increased operational stability.

4 cl, 2 dwg