This 100mm circle was cut using engraving bit included in the kit. (6040)
Cut 2mm deep, 2 passes.
feed speed 8mm per second.
that was too fast, as the point of the bit broke off(about 0.5mm of it snapped off)
Spindle at full speed (9K RPM according to specs)
Will try 5mm per sec feed speed in future.
This machine is strong and solid!