18mm to 12mm or 8mm inductive/proximity sensor adapter

thingiverse

Here is the rewritten text: Take an existing 18mm hole down to a snug 12mm fit with this simple adapter. To upgrade, I've also added an 18mm to 8mm adapter for even more flexibility. The design has some wiggle room built in to ensure a precise fit every time. The collar on the edge prevents the 18mm section from slipping through, keeping everything secure. For a rock-solid assembly, use two of these adapters, one on top and one at the bottom of your current 18mm bracket, and let the 12/8mm sensor bolts hold it all together. To get the best results, print this adapter at high quality with slow speeds and 100% infill for maximum accuracy and strength. The printing process itself is quick and only requires a minimal amount of material.