Abstract: The present invention relates to a machine tool 100 for machining a workpiece 12 by means of a tool 22, which comprises a clamping means 11 for clamping the workpiece 12 and a support means 21 for receiving the tool 22, wherein the clamping means 11 is mounted on a spindle head of a clamping means-carrying work spindle 10 and the support means 21 is mounted on a spindle head of a support means-carrying work spindle 20, and the machine tool 100 is designed to position the two work spindles 10, 20 by means of numerically controllable axes in relation to one another in such a way that the workpiece 12, which is clamped in the clamping means 11, can be processed by the tool 22, which is received in the support means 21.

Abstract: A grinding tool with a coolant supply device for a machine tool and such a coolant supply device. The coolant supply device for the grinding tool has a main body with engagement portions or holes and a line unit for redirecting coolant to a predeterminable processing area of the grinding tool. Using a clamping device, it is possible to releasably secure the coolant supply device to the shaft of the grinding tool. As a result of the attachment of the coolant supply device on the grinding tool, it is possible to tap the coolant of the machine tool via an additional valve device on the connector ring of the machine tool from the standard cooling circuit and supply it to the grinding location in a predeterminable processing area of the grinding tool.

Abstract: The present invention relates to a two-stage electrohydraulic servo valve with a first stage, which operates as pilot stage and includes a movable nozzle tube, and a second stage which operates as power stage, wherein the nozzle tube of the pilot stage is guided by means of a torsion element and the oil supply of the movable nozzle tube is integrated in the torsion element.

Abstract: The present invention relates to a two-stage electrohydraulic servo valve with a first stage, which operates as pilot stage and includes a movable nozzle tube, and a second stage which operates as power stage, wherein the nozzle tube of the pilot stage is guided by means of a torsion element and the oil supply of the movable nozzle tube is integrated in the torsion element.