A separating device of a testing unit for the nondestructive physical testing of corresponding test objects that are rotationally symmetrical with respect to an object axis (1.1), having a bottom surface (1.2), a top surface (1.3), and a lateral surface (1.4) extending between the bottom surface (1.2) and the top surface (1.3), comprising - a continuous conveyor system having at least one conveying means, set up for transporting the test objects in a single row in a transport direction (2.2) in a transport plane (2.1), wherein an accumulation section, an engagement section, an acceleration section and a transport section are arranged in succession in the transport direction (2.2) in the transport plane (2.1), - two pocket wheels (3.1, 3.2) having a plurality of pockets (3.4) distributed uniformly over the circumference, which are arranged so as to be rotatable about axes (3.3), - a drive, which makes the pocket wheels (3.1, 3.2) rotate synchronously in opposite directions about their axes (3.3), - wherein the engagement section extends between the two pocket wheels (3.1, 3.2), and the spacing between the axes (3.3) of the pocket wheels and the spacing of the pocket wheels (3.1, 3.2) from the transport plane (2.1) is determined in such a way that the lateral surface (1.4) of each test object comes into contact with in each case one pocket (3.4) of the two pocket wheels (3.1, 3.2) in the engagement section, characterized by - a control system for adjusting the speed of rotation of the pocket wheels (3.1, 3.2) relative to the speed of each conveying means of the continuous conveyor system, which control system is set up in such a way that the transport speed of the test objects in the accumulation and engagement section (7, 8) is lower than the transport speed of the test objects in the acceleration and transport section (9, 10), - the control system for adjusting the speed of rotation of the pocket wheels (3.1, 3.2) relative to the speed of each conveying means of the continuous conveyor system is part of a control circuit which ensures that the accumulation section immediately ahead of the engagement section is maintained, - and a sensor, designed for monitoring the accumulation section for gaps in the transport flow of the test objects, wherein, if a gap is detected, the controller, as a countermeasure, reduces the speed of rotation of the pocket wheels (3.1, 3.2) by means of the control system. - a continuous conveyor system having at least one conveying means, set up for transporting the test objects in a single row in a transport direction (2.2) in a transport plane (2.1), wherein an accumulation section, an engagement section, an acceleration section and a transport section are arranged in succession in the transport direction (2.2) in the transport plane (2.1), - two pocket wheels (3.1, 3.2) having a plurality of pockets (3.4) distributed uniformly over the circumference, which are arranged so as to be rotatable about axes (3.3), - a drive, which makes the pocket wheels (3.1, 3.2) rotate synchronously in opposite directions about their axes (3.3), - wherein the engagement section extends between the two pocket wheels (3.1, 3.2), and the spacing between the axes (3.3) of the pocket wheels and the spacing of the pocket wheels (3.1, 3.2) from the transport plane (2.1) is determined in such a way that the lateral surface (1.4) of each test object comes into contact with in each case one pocket (3.4) of the two pocket wheels (3.1, 3.2) in the engagement section, - a control system for adjusting the speed of rotation of the pocket wheels (3.1, 3.2) relative to the speed of each conveying means of the continuous conveyor system, which control system is set up in such a way that the transport speed of the test objects in the accumulation and engagement section (7, 8) is lower than the transport speed of the test objects in the acceleration and transport section (9, 10), - the control system for adjusting the speed of rotation of the pocket wheels (3.1, 3.2) relative to the speed of each conveying means of the continuous conveyor system is part of a control circuit which ensures that the accumulation section immediately ahead of the engagement section is maintained, - and a sensor, designed for monitoring the accumulation section for gaps in the transport flow of the test objects, wherein, if a gap is detected, the controller, as a countermeasure, reduces the speed of rotation of the pocket wheels (3.1, 3.2) by means of the control system.