5mm (half a cm) is way too big for kerf. Here’s a thread from 5 days ago stating 0.007-0.008in
IDNHMGF(Y) but I do have one of these lying around for kerf testing:
https://www.amazon.com/gp/product/B00T86ADZ4/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
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