What the medium-duty rating means for fit
The XCKP2518G11: Medium Duty is the middle tier in the limit-switch classification — heavier than a miniature or subminiature switch (which are for light-position sensing in compact spaces), but not a heavy-duty foundry or washdown-rated switch. For a food-and-beverage plant or a general packaging line, this is the fast mover: robust enough for cam-actuated position sensing on a case erector or a palletizer infeed, without paying for the overbuilt housing of a heavy-duty switch that won't see the abuse. The category tells you the mechanical life and overtravel are spec'd for continuous industrial cycling, not occasional use.