Drilling drive has drilling unit, which has drilling shaft, piston rod with piston, stay bolt arranged laterally to each other, and stored in housing

摘要

The drilling drive has drilling units (3) lying next to each other. A drilling unit has drilling shaft, piston rod with piston and a stay bolt arranged laterally to each other and are connected to a yoke plate. The drilling unit is stored axially in a housing (1) and controlled by piston.