METHOD OF MOUNTING ROLLER DRILL BIT BEARING Russian patent published in 2012 - IPC E21B10/22 

FIELD: mining.

SUBSTANCE: invention relates to rock cutting tools, namely to roller drill bit bearings. Proposed method comprises fitting roller cutter with annular groove on journal and locking its against axial displacement by lock assembly elements. Prior to fitting roller cutter on journal, lock assembly spring-loaded elements are recessed in journal radial grooves flush with its outer surface and locked thereat. Then, roller cutter is fitted on said journal to align spring-loaded elements with cutter annular grooves and release said elements.

EFFECT: higher efficiency.

2 dwg