The disclosure relates to an assembly for a mower of a mowing or choppingmachine,comprising a tool carrier (1), which is formed with a carrier disk (2) andwhich is configured tobe mounted rotatably about an axis of rotation to a mower of a mowing orchopping machine;and cutting tools (6), which are each formed with a cutting blade locatedradially outwardly tothe axis of rotation and a holding section located radially inwardly to theaxis of rotation andwhich are detachably mounted to the carrier disk (2) in an assigned carriersection (5),wherein the cutting tools (6) are each mounted to the tool carrier (1) bymeans of a mountingbolt; characterized in that the mounting bolt (9) is in each case mounted tothe cutting tools(6) in a non-detachable manner. The disclosure furthermore relates to areplacement cuttingtool and a mower for a mowing or chopping machine.