A PISTON CONSTRUCTION FOR AN AXIAL BEARING OF A DRILLING MACHINE

摘要

The invention relates to a piston construction for a drilling machine provided with an axial bearing. The piston construction comprises a separate piston portion (5) and a bearing portion (7) to be mounted coaxially with said piston portion, whereby the piston portion (5) is to be mounted in a cylinder space (4) provided inthe frame of the drilling machine, and the bearing portion (7) is to be mounted between the piston portion (5) and the shank (3).