Induction heating device (40a-c) for a shrink-clamping and/or unshrink-unclamping of tools (1 0a-c) into and/or out of a tool holder (12a-c), with an induction heating unit (16a-c) which comprises at least one induction coil (14a-c) and is configured, in a shrink-clamping and/or unshrink-unclamping process, to heat-expand at least a portion of a tool holder (12a-c) that is arranged in a receiving region (18a-c) of the induction heating unit (16a-c), wherein the receiving region (18a-c) of the induction heating unit (16a-c) is in particular oriented at least substantially parallel to designated rotation axes (20a-c) of tool holders (12a-c) which are insertable in the induction heating unit (16a-c), with at least one magnetic flux conducting unit (24a-c) comprising at least one magnetic flux conducting element (22a-c) for a conduction of a magnetic flux generated by the induction coil (14a-c), and with a bearing unit (26a-c) which is configured at least for a movable support at least of the magnetic flux conducting element (22a-c), wherein at least a large portion of all points of the magnetic flux conducting element (22a-c), preferably all points of the magnetic flux conducting element (22a-c), each have a respective movement path (28a-c, 30a-c, 32a-c) that is predetermined by the bearing unit (26a-c), in particular by at least one slotted guide (44a, 46a; 44b, 46b; 44c) of the bearing unit (26a-c), characterised in that each of the movement paths (28a-c, 30a-c, 32a-c) has an essential movement component (34a-c) that is oriented perpendicularly to a radial direction (36a-c) of the receiving region (18a-c) and at the same time perpendicularly to an axial direction (38a-c) of the receiving region (18a-c), and wherein at least one of the movement paths (28a-c, 30a-c, 32a-c) is a purely linear movement path (28a-c). with an induction heating unit (16a-c) which comprises at least one induction coil (14a-c) and is configured, in a shrink-clamping and/or unshrink-unclamping process, to heat-expand at least a portion of a tool holder (12a-c) that is arranged in a receiving region (18a-c) of the induction heating unit (16a-c), wherein the receiving region (18a-c) of the induction heating unit (16a-c) is in particular oriented at least substantially parallel to designated rotation axes (20a-c) of tool holders (12a-c) which are insertable in the induction heating unit (16a-c), with at least one magnetic flux conducting unit (24a-c) comprising at least one magnetic flux conducting element (22a-c) for a conduction of a magnetic flux generated by the induction coil (14a-c), and with a bearing unit (26a-c) which is configured at least for a movable support at least of the magnetic flux conducting element (22a-c), wherein at least a large portion of all points of the magnetic flux conducting element (22a-c), preferably all points of the magnetic flux conducting element (22a-c), each have a respective movement path (28a-c, 30a-c, 32a-c) that is predetermined by the bearing unit (26a-c), in particular by at least one slotted guide (44a, 46a; 44b, 46b; 44c) of the bearing unit (26a-c), characterised in that each of the movement paths (28a-c, 30a-c, 32a-c) has an essential movement component (34a-c) that is oriented perpendicularly to a radial direction (36a-c) of the receiving region (18a-c) and at the same time perpendicularly to an axial direction (38a-c) of the receiving region (18a-c), and wherein at least one of the movement paths (28a-c, 30a-c, 32a-c) is a purely linear movement path (28a-c).