Patent ID: 8707835

Claim:
A movable tool holder for turning a brake disc, the tool holder comprising: a cutting tool for cutting the brake disc; a shaft mounted for rotation about a rotation axis; a coupling section that includes a plate fastened by bolts to a hub that is mounted on the shaft; securing devices for securing the brake disc; and devices for keeping the brake disc at right angles, wherein the devices comprise: a hinge construction with a first part formed by a sphere and a second part formed by a receiver and a compression ring; wherein the receiver is connected to the coupling section; wherein the compression ring is connected to the securing devices; a bearing connection connecting the second part and the securing devices; wherein the first part is connected to the coupling section and the second part is connected to the securing devices; and wherein the sphere has a hollow tube passing through it, which is connected to the coupling section, and in that the sphere, receiver, and compression ring have an opening in the middle and are pushed over the tube of the first part, so that the sphere is enclosed between both the receiver and the compression ring, and in which the receiver and the compression ring may be clamped onto the sphere.