Agricultural header with damage-reducing clutch

An agricultural harvester, comprising:

• a chassis;
• and
• a header carried by the chassis, the header comprising:
• a header frame;
• at least one cutting unit carried by the header frame and comprising a cutting element and a driveshaft coupled to the cutting element;
• a gearbox configured to drive the cutting element, the gearbox comprising:
• a gearbox output rotatably coupled to the driveshaft;
• and
• a clutch comprising an intermediate shaft and at least one clutch shoe rotatably coupled to the intermediate shaft and displaceable between a non-engaging position where the at least one clutch shoe does not engage the gearbox output and an engaging position where the at least one clutch shoe engages the gearbox output, the clutch being configured such that the at least one clutch shoe displaces to the engaging position when a rotational speed of the intermediate shaft reaches a threshold value;
• and
• a disengagement drum rotatably coupled to the intermediate shaft and configured to displace from a drive position to a neutral position where the disengagement drum prevents the at least one clutch shoe from displacing to the engaging position.