Hi Celso,
A lot of work that reminds me of my knife making machinery.
The belt grinder is very familiar and the buffing wheel is the same one I use.
Only difference is we, that is Sheffield Cutlers, run our polishing wheels in the opposite direction so that the top of the wheel is travelling away from you. That way a fan inlet can be sat behind the wheel to catch the dust and it seems easier to work seated and with the work in front of you than with it standing.
Grinding wheels are run that way too. I'm just used to it now and run most of my wheels that way.
Brilliant work by the way, I made my own hammers from scratch as I could not source any small enough for my needs.
Mick