What is your advice on size disparities in meshes?

Hello learning forum!

I have questions regarding my meshes involved in an interaction between a rotating cylinder sample and a small tool. Also if you have any comments as to the way I am approaching this simulation, please feel free to provide your input!

I have attempted to section my models to generate a better hex mesh.

My concern is that the mesh of my tool is finer than my sample. Also, my sample does not have layers at the surface of interaction. Should I consider layers where the sample would be machined?

As a side note, I have the student copy of Ansys and the scale of this analysis is quite small. I am primarily interested in the stresses, strains, and forces in the tool.

I would appreciate your input. 😀

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