2026-06-04
Choosing CNC spindle power by kW alone leads to expensive mistakes. This guide explains how material, cutter diameter, working RPM, torque, S1/S6 duty, cutting load, machine rigidity, Z-axis weight, VFD and cooling determine whether 1.5 kW, 2.2 kW, 3 kW, 4.5 kW or 5.5 kW is the right choice.