Promoting machine tool utilization efficiency and shortening cycle times, FlexArm Hydraulic Tapping Arms run tapping and threading operations offline while CNC is running. Tapping 1 ½ in. in mild steel at 110 rpm is made possible due to Hydraulic Power Packs and gearboxes, and tapping and threading with FlexArm while lathe is running eliminates thread milling operations. End-users can program exact RPM for forward and reverse, and programmable depth control allows consistent tapping depth.