... They are capable of making vertical, horizontal and slant drilling. Diamond wire thread through the holes and then ... work. ModelUnitQQZ-12/14 Max. drilling depthm35-40 Dia. Of drilling holemm80, 90 Drilling speedm/h6-8 Min. air pressureMpa0 ... pneumatic motor, reducer, chain Drilling head rotation device pneumatic motor, reducer Drilling direction any direction Adjusting height of the bottom jackmm220 ...