Does anyone knows how to model an eccentric reducer as per ASME B16.9?

I have been trying to model an eccentric reducer as per ASME 16.9 dimensions and shape, please, if anyone has the guidelines how to do it; is much appreciated, thanks in anticipation!


They have several eccentric reducers with cad model downloads for free.
They also have the drawings, if you’re wanting to try and model it to spec yourself.

As much as I enjoy modeling, if there is a downloadable asset available, I’m more than likely going to use it.

Here’s a simple approach. Note that all dimensions are arbitrary.


In addition to @TigerMike’s solution, you can also try out using guides to your loft to fully control the curvature.

Here’s how: