Abstract: A method for the measurement of the stock of a gear with an axis of rotation which has to be finished in the hardened state, wherein the gear has a gearing with a plurality of teeth at its outer and/or inner circumference and wherein the teeth have, compared with the finished geometry, a stock on their tooth flanks. To carry out a reliable measurement of the stock the invention proposes that the position of the surface of the tooth flank with the stock is detected by using optical distance measurement by means of a distance sensor, wherein a light beam is directed by the distance sensor onto the surface, wherein the light beam is guided onto the surface in such a way that it is perpendicular to the axis of rotation or that it is parallel to this direction.

Abstract: The invention covers a method and a mechanism for the simultaneous machining of profile sections of one and the same work piece by two grinding wheels. Acc. to the method first the finish-grinding positions of the two grinding wheels (4.1 and 4.2) are calculated. After moving the two grinding wheels (4.1 and 4.2) into these positions these two grinding wheels (4.1 and 4.2) are profiled by the dressing tool (1) to generate a surface/roughness suitable for rough-grinding. Then the two grinding wheels (4.1 and 4.2) are moved into the calculated rough-grinding positions and then this operation takes place. Then the two grinding wheels (4.1 and 4.2) are moved into the finish-grinding positions followed by dressing to generate the surface/roughness for finish grinding. Acc. to the mechanism the grinding slides (14.1 and 14.2) are arranged in such a way that the two grinding wheels (4.1 and 4.2) have a common axis of rotation (15).