Abstract: A centring ring (5) and a method for reducing the risk of breakage of at least one thin-walled area of a centring ring (4) are proposed, the centring ring (5) having at least two thick-walled segments, i.e. at least one first thick-walled segment (15) and one second thick-walled segment (16), said first thick-walled segment (15) having a side surface (23) which faces a side surface (31) of the second thick-walled segment (16), said side surfaces (23, 31) touching each other at least partially or being separated from each other by a gap (37) having a given clearance B (38), and said centring ring (5) including at least one movement limiter (24, 48) which allows the side surfaces (23,31) to merely drift apart under the application of force and/or drift towards each other under the application of force until a certain clearance B (38) is reached.