Mounting attachment and bearing system for an industrial earth-boring cutter

摘要

A rotary cutter mount for an earth-boring cutter includes a bearing journal adapted to be coupled to a cutter body. A first mounting end of the bearing journal is shaped to enable rotationally fixed positioning in a corresponding yoke. The yoke is operatively coupled to the body of the cutter. A ball race is formed in an exterior surface of the journal. A ball loading passage is formed in the journal. The ball loading passage has an exit hole on the race. The hole is positioned so that it is disposed in a rotary orientation which is at a selected angular displacement from the maximum radial loading on the journal. The first mounting end and the corresponding yoke are adapted to enable a plurality of rotary orientations. Each of the rotary orientations is such that the hole is oriented other than in the direction of maximum radial loading.