Multifunction Spindle for a Machine Tool

A multifunction spindle for a machine tool for machining workpieces, comprising a spindle housing, a rotational drive, and a tool-holding unit, wherein the tool-holding unit is disposed within the spindle housing and pivots relative to the spindle housing about an axis perpendicular to the axis of rotation, wherein at least two mutually independent and adjacent measurement heads for sensing identical position angles are connected to the tool-holding unit by which measurement heads the measured position angle signals are transmitted using a transmission unit on at least two mutually independent transmission paths to a controller of the machine tool equipped with the multifunction spindle, wherein at least one transmission path is used for position control and at least one transmission path establishes functional reliability of the pivot axis positioned perpendicular to the drive shaft, wherein the transmission unit supplies power, without contact, to at least two connected measurement heads, wherein the transmission unit consists of at least two parts which rotate relative to each other at the spindle rotational speed, and wherein the transmission unit has a central bore through which media ducts are passed centrally.