This mechanism uses a compact bevel-gear mesh to transfer rotation across a sealed wall panel. The blue gear sits on one side and turns the green bevel gear set on the opposite side. Because bevel gears redirect motion at 90 degrees, the yellow output shaft receives clean rotational drive while the wall remains closed except for a small bearing passage.

Components — Blue input gear, green bevel gear set, yellow output shaft, pink alignment pins, white wall panel, bearings, and mounting collars.

How it works — Rotating the blue input gear causes the green bevel gear to spin through their angled tooth engagement. The bevel gear is rigidly fixed to the yellow shaft on the far side of the wall, so the shaft turns in sync with the input. Only a narrow shaft passes through the wall, allowing the mechanical drive to be transmitted without exposing internal components or requiring a large opening. The pink guides help maintain perfect alignment so the bevel mesh runs smoothly.

Applications — Sealed enclosures, food-safe machinery, underwater housings, laboratory equipment, glovebox mechanisms, and any system requiring rotation across a barrier.

Why it matters — This design keeps the internal mechanism protected while still allowing external control. It preserves sealing, reduces contamination risks, and enables flexible layouts where the driving motor or crank must remain outside a closed environment.