Abstract: A method for positioning operative cylinders, for example of rolling-mills or paper-mills on a grinding machine, includes at least the following steps: A—positioning the transversal, longitudinal center-line plane of the cylinder in correspondence with a reference point situated between a movable piece-holder head and tailstock center of the machine; B—moving the piece-holder head and the tailstock center in the direction of the cylinder until there is a reciprocal coupling. The present invention relates also to a machine for implementing the above method.

Abstract: A hooking device for moving systems of rolling cylinders includes a load-bearing lifting structure of a cylinder provided with a gripping structure and an upper hooking structure suitable for keeping the device in a raised position. The device also includes a non- load bearing tilt compensation structure. The tilt compensation structure includes a series of guides, where each guide is provided with at least one mass element. The at least one mass element is moveable along the guide.

Abstract: A hooking device (1) for moving systems of rolling cylinders comprises a lifting structure (30-32) of a cylinder (50) provided with gripping means (4) of said cylinder (50) and upper hooking means (10) suitable for keeping said device (1) in a raised position, said device (1) also comprising tilt compensation means. According to the invention, said tilt compensation means comprise a series of guides (100, 120), each guide (100, 120) being provided with at least one mass element (200, 220), said at least one mass element (200, 220) being moveable along said guide (100, 120).