4. Milling power and pressure

4.1 Specific cutting pressure

The specific cutting pressure (K _c ) is an important factor in calculating the power required for a milling operation, a factor which gives a measure of the machinability of a given material given the geometry and chip thickness chosen.

Specific cutting pressure is, by definition, the (tangential) force required to detach a chip with a cross-section of 1 square millimeter. In practice, this is the cutting force (F _c ) required, divided by the surface area of the undeformed chip (A ) (figure 19 ). It is measured in N/mm ² ...