ROTERBART BORRSKER

摘要

A roller bit for rock drilling comprising a body having at least one stub axle and a geared cutting element rotatably mounted on said stub axle. The stub axle and cutting element have confronting spaced raceways for a plurality of rolling elements. A shoulder is formed adjacent one end of the raceway in the stub axle to axially fix the rolling elements in one direction. A locking ring is mounted in the cutting element having an abutment shoulder confronting the opposite axial end faces of the rolling elements and axially fixing the rolling elements in a direction in the opposite direction. The locking ring has an outer cylindrical peripheral surface engaging in a complementary cavity in the cutting element adjacent the raceway surface therein. The locking ring has a seat for mounting a resilient sealing member engaging the stub axle adjacent the raceway therein connected in the mounted state to the stub axle.