4) Cutting speeds affect the maximum cutting forces and the maximum cutting torque.
Cutting forces increase with increasing cutting speed.
However, the maximum cutting torque decreases with increasing cutting speed.
6) Conventional milling direction yields the best performance in terms of tool failure under both dry and cryogenic cooling conditions.
7) Cryogenic cooling by spraying LN2 to cutting zone has no remarkable advantage over dry milling with this tool-workpiece pair.