Abstract: A drilling machine for drilling large drill holes in rock, especially underground, comprises a support, a rotary drilling drive longitudinally displaceable on the support in a drilling direction and provided with a reducing transmission and drive motors. The reducing transmission including a planetary transmission which is transmissively and selectively connectable with two of the drive motors as a superposed transmission.

Abstract: A rock drilling machine, particularly for underground excavations comprises a drilling carriage, and a rotary drilling drive arranged in a longitudinally displaceable manner on the drilling carriage, the rotary drilling drive having a drive shaft, an adaptor connected with the drive shaft for joint rotation therewith and having a threaded end for form-locking receipt of drilling rods with a respective counter thread, and a clamping head co-rotating with the drive shaft for force-transmitting receipt of outwardly smooth drilling rods, the adaptor being arranged forwardly of the clamping head as considered in a drilling direction, the threaded end of the adaptor extending outwardly beyond the clamping head for free observation and being releasably mounted on a part of the drive shaft independently of the clamping head.