Ignoramus30138 fired this volley in
:

I thought that it actually is abrasive and also clogs the coolant
pump.


both.

And the statement earlier that "most" woods don't contain much silica is
rife with problems. As wood selections get cheaper, and more and more of
the scrap is salvaged, more bark, root, and knot sections get included in
plywood and press-board products, raising the silica content beyond what
you want on your nice tools.

LLoyd