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[–] Adminstrater 0 points 2 points (+2|-0) ago 

It could be a fail safe to prevent more damage to the machinery. Like a Shear Pin.

In the role of a mechanical safeguard, a shear pin is a safety device designed to shear in the case of a mechanical overload, preventing other, more expensive parts from being damaged. As a mechanical sacrificial part, it is analogous to an electric fuse.