3D print a vacuum or hose adapter to size
A hose adapter connects two fittings with different diameters. The key question is not only "35 to 32 mm" but whether each side is an inside socket or an outside spigot. Define both ends separately before designing the adapter.
Measure side A and side B separately
For each end define:
- socket or spigot
- diameter
- insertion depth
Nominal size is not always actual size
Measure the real fitting.
Ribs and barbs
A ribbed surface can help grip flexible hose, but the correct geometry depends on hose material and wall thickness.
Use a smooth transition where useful
Avoid an unnecessarily abrupt internal step where airflow matters.