How to slice model in equal part in Z for CNC layer preparation

Hello,
I would like to cut a model in several part in Z axis so I can used the CNC with normal lenght drill instead of looking for an extra long one.
How can I get this done in Fusion without doing it by hands, with some mark to get the different layer aligned together once cut by the CNC?

The model is 150mm high, and I would like to used 30mm foam board, then glued them together after machining.

Thanks