A numerically controlled machining center for performing work on a workpiece including a plurality of magazines holding a plurality of tools, each magazine positioned a first distance from an adjacent magazine, a plurality of spindles equal to the number of magazines and movable relative to one another independent of the positions of the magazines, the spindles movable apart from one another in a tool loading position to accommodate large magazine sizes and movable toward one another in a working position to allow the tools to work close together to minimize waste, and a table for supporting a workpiece.

The invention relates to a grinding installation with a grinding machine having a head plate which is driven in a rotating and/or oscillating manner and is designed for receiving and releasably holding a grinding disk and with a device for replacing a grinding disk, which is releasably fixed on the head plate, with a stop element, against which the head plate with the grinding disk can be placed in a removal position, at least one removal finger which is adjustable between a retracted position and an engaged position, in which the removal finger engages into a recess on the head plate in the removal position, and a clamping means, through which the at least one removal finger is displaceable relative to the stop element, wherein the removal finger, for the purpose of releasing the grinding disk, comes to rest against its rear side and clamps the grinding disk on the stop element. The invention furthermore describes a corresponding method for replacing a grinding disk.