... and tapping 2- Gear driven system, 12 speed steps Vertical drilling machine: Z50501- New-designed, compact construction2- CE, CSA, UL ... spindle speed stepless5- Digital display of spindle speed and cutting depth6- Both motor-driven and manual-operated lifting system of ... for single piee, small batch and mass production for drilling,counter boring,reaming, tapping,spot facing,etc. ModelZ5050 Max ...