| 摘要 |
<p>Rock bit assembly comprising a rock bit for drilling holes in the earth's crust mainly consisting of an integral bit body which can be connected to a drive shaft, a number of rotatable cutter cones which, by means of a rolling bearing arrangement, is rotatably connected to said bit body, each of said cutter cones comprising a central shaft or pin forming a part of said rolling bearing arrangement, wherein a cutter cone and bearing arrangement form a unit which is disengageably secured to said bit body by means of the outer race ring of said bearing arrangement.</p> |
